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Review  |  Open Access  |  25 Jun 2024

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

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Energy Mater 2024;4:400063.
10.20517/energymater.2023.146 |  © The Author(s) 2024.
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In recent decades, lithium-ion batteries (LIBs) have emerged as a primary focus in the energy-storage field owing to their superior energy and power densities. However, concerns regarding the depletion of non-abundant lithium resources have prompted the exploration and development of emerging energy-storage technologies, such as sodium- (SIBs) and potassium-ion batteries (PIBs). In addition, all-solid-state LIBs (ASSLIBs) have been developed to address the issues of flammability and explosiveness associated with liquid electrolytes. Among the various alloy-based anodes, antimony (Sb) anodes exhibit high energy densities owing to their high theoretical volumetric capacities that are attributable to their high densities. However, Sb anodes exhibit poor cyclabilities owing to excessive volume changes during cycling. To mitigate this issue, researchers have investigated the use of diverse solutions, including solid electrolyte interface control, structural control, and composite/alloy formation. Herein, we review and summarize Sb-based anode materials for LIBs, SIBs, PIBs, and ASSLIBs developed over the past five years (2018-present), focusing on their reaction mechanisms and multiple approaches used to achieve optimal electrochemical performance. We anticipate that this review will provide a comprehensive database of Sb-based anodes for LIBs, SIBs, PIBs, and ASSLIBs, thereby advancing relevant studies in the energy-storage-systems field.


Battery, Li-ion battery, Na-ion battery, Sb-based anode, K-ion battery, all-solid-state battery, anode


The increasing demand for sustainable energy storage has driven research into high-performance battery technologies[1-5]. Lithium-ion batteries (LIBs) currently dominate the secondary battery market but are anticipated to face limitations in the near future owing to unevenly distributed Li reserves and the depletion of Li resources. To address these concerns, new energy storage system (ESS) technologies, such as sodium- (SIBs)[6-10] and potassium-ion batteries (PIBs)[10-16], have emerged as secondary battery systems that utilize Na and K as charge carriers. Because Na and K belong to the same elemental group as Li, they undergo electrochemical reactions similar to Li (-3.04 vs. Li+/Li). Consequently, they offer advantages in terms of adoption in LIB systems, including electrode material selection and analytical methods. Additionally, Na and K are abundantly available, inexpensive, and have standard electrode potentials similar to Li (Na: -2.71 vs. Na+/Na, K: -2.93 vs. K+/K). However, owing to safety concerns regarding liquid-electrolyte-based systems[17-19], all-solid-state LIBs (ASSLIBs) are regarded as next-generation battery technologies owing to the utilization of solid electrolytes, which are more mechanically strong and non-flammable compared to typical carbonate-based liquid electrolytes. ASSLIBs can suppress thermal runaway and deliver higher energy densities than LIBs by eliminating the need for separators and replacing fire-related safety devices[20,21].

Enhancing high-performance anode materials remains a critical challenge. Carbonaceous anode materials (mainly graphite) have long been used in LIBs owing to their cycling stabilities and low costs[17]. However, high-performance anodes need to overcome the inherent limitations of the low theoretical capacities and sluggish rate capabilities of carbonaceous anode materials. Similarly, high-performance anode materials for SIBs and PIBs are also urgently needed[22-24]. Hard carbon is the preferred SIB anode material because the interlayer spacing of graphite is too narrow to accommodate Na ions. However, hard carbon has a limited reversible capacity with a poor initial Coulombic efficiency (ICE). Although various carbonaceous anode materials can be used in PIBs, they exhibit low reversible capacities (279 mAh g-1, KC8). Similarly, during the initial stages of ASSLIB research, a solid electrolyte with a high mechanical strength physically inhibited the growth of Li dendrites, thereby facilitating the direct utilization of lithium metal. However, recent studies have found that the direct use of lithium metal results in self-destructive properties[19,20] that also promote the decomposition of the solid electrolyte at the interface, leading to the growth of Li dendrites. Furthermore, graphite anodes also accelerate solid-electrolyte deterioration due to their low reaction potentials (0-0.2 V vs. Li+/Li) and high electrical conductivities (~103 S/m)[25,26]. Therefore, research into high-performance anode materials applicable to LIBs, SIBs, PIBs, and ASSLIBs with high capacities, long-term cycling stabilities, fast rate capabilities, and that do not form dendrites is required.

Antimony (Sb) is a promising alternative high-performance next-generation anode material candidate that simultaneously meets the aforementioned requirements for LIBs, SIBs, PIBs, and ASSLIBs. Figure 1 shows that an Sb anode exhibits the same high theoretical capacity of 660 mAh g-1 [Table 1 and Figure 1A] in alkali metal-ion batteries (AIBs)[9-16,27-39]. In particular, the Sb anode offers a high theoretical volumetric capacity (Table 1 and Figure 1B, 4,420 mA h cm-3)[27-31], which is attributable to the high density of Sb (6.70 g cm-3 at ambient temperature). Although the theoretical capacity of Sb is high, Sb anodes are poorly cyclable owing to excessive volume change experienced during cycling (Table 1 and Figure 1C; Li3Sb: 134%, Na3Sb: 291%, and K3Sb: 406%). To address the issue of Sb anodes, researchers have explored various strategies based on a comprehensive understanding of their electrochemical reaction mechanisms in AIBs and ASSLIBs. Among numerous studies and strategies, this review focuses on three main strategies for improving the performance of Sb-based anodes. First, solid electrolyte interface (SEI) layer control is a strategy for optimizing the construction and composition of the SEI layer that develops on the electrode surface during cell operation. An ideal SEI layer is chemically stable, ion-conductive, and inhibits excessive electrolyte decomposition, thereby enhancing cycling stability[40,41]. Second, structural control strategy involves tailoring the morphology and nanostructure of the Sb material. Techniques such as creating porous structures, nanoparticles, or nanowires can improve the electrolyte accessibility to the active material and accommodate volume change during the electrochemical reaction, thereby improving the rate capability and reducing capacity degradation[42-44]. Third, composite/alloy formation strategy provides high battery performance by incorporating other elements that can improve the electrical conductivity of Sb anodes and enhance their mechanical stability by suppressing volume change[45-54]. Other improvement strategies, including using protective layers[55,56] and highly conductive additives[57,58], are also available. Unfortunately, the abovementioned improvements only provide temporary performance enhancements, and their abuse can result in undesirable side reactions that degrade performance. On the other hand, binder optimization undeniably improves performance by enhancing the mechanical strength of the active material and its adhesion to the current collector[59]. However, the binder does not directly participate in electrochemical reactions; therefore, the three key-point strategies discussed above are directly related to the electrochemical reaction and significantly affect performance improvement. This review presents recent breakthroughs in Sb-based anodes for AIBs and ASSLIBs reported over the past five years (2018-2023).

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 1. Comparing various anode materials (graphite (C), Si, Sn, and Sb) for LIBs, SIBs, and PIBs. (A) Theoretical gravimetric capacities. (B) Theoretical volumetric capacities. (C) Volume changes during electrochemical reactions. Parameter values were calculated for theoretically fully discharged phases (C: LiC6, NaC64, KC8; Si: Li4.4Si, NaSi, KSi; Sn: Li4.4Sn, Na3.75Sn, KSn; Sb: Li3Sb, Na3Sb, K3Sb).

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 2. Crystallographic schematic of the Li-ion reaction pathway for an Sb anode in LIBs.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 3. Crystallographic schematic of the Na-ion reaction pathway for an Sb anode in SIBs.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 4. Crystallographic schematic of the K-ion reaction pathway for an Sb anode in PIBs.

Table 1

Electrochemical properties of graphite, Si, Sn, and Sb anodes for LIBs, SIBs, and PIBs

Anode materialTheoretically fully
(g cm-3)
Molar mass
(g mol-1)
Molar volume
(cm3 mol-1)
Theoretical capacityVolume change
(mAh g-1)
(mAh cm-3)
Graphite (C)LiC62.2079.03637284112.1
Silicon (Si)Li4.4Si1.1858.6504,1999,786312.1
Tin (Sn)Li4.4Sn1.92149.2789937,259378.7
Antimony (Sb)Li3Sb3.35142.6436604,420134.1


Sb anodes undergo alloying/dealloying with alkali metal ions, especially Li+, Na+, and K+, to form Li3Sb, Na3Sb, and K3Sb during charging and discharging. In addition, Sb has a unique puckered structure, and its interlayer space effectively accommodates the insertion of alkali metal ions. The reported electrochemical reaction mechanism of the Sb anode during discharging and charging in each system (LIBs, SIBs, PIBs, and ASSLIBs) is summarized below.

Sb-anode reaction mechanism in LIBs

Various studies have examined the electrochemical reaction mechanisms associated with Sb anodes in LIBs[60-62]. Park et al. demonstrated the reaction mechanism of an Sb anode using ex-situ X-ray diffraction (XRD)[60]. During discharging (lithiation), rhombohedral Sb alloys with Li form an intermediate crystalline hexagonal Li2Sb phase and then transform into a fully discharged cubic Li3Sb phase. In contrast, during charging (delithiation), cubic Li3Sb is directly converted into rhombohedral Sb without involving an intermediate phase. Shin et al. demonstrated the same electrochemical reaction mechanism using in-situ time-domain thermoreflectance analysis[61]. The asymmetric behavior of the Sb anode during discharging and charging was also elucidated by Chang et al. using first-principles calculations and nuclear magnetic resonance (NMR) spectroscopy[62]. These researchers insisted that the higher nucleation driving force associated with Sb results in a single-step reaction pathway in which Li3Sb is directly recovered to Sb without forming a thermodynamically stable Li2Sb intermediate phase during the charging process. Therefore, the suggested reaction mechanism for the Sb anode in LIBs during discharging/charging is summarized by equations (1) and (2), along with the crystallographic schematic shown in Figure 2.

During discharging:

$$ \begin{equation} \begin{aligned} \mathrm{Sb}\left(\text {Rhombohedral) } \rightarrow \mathrm{Li}_{2} \mathrm{Sb} \text { (Hexagonal) } \rightarrow \mathrm{Li}_{3} \mathrm{Sb}\right. \text { (Cubic) } \end{aligned} \end{equation} $$

During charging

$$ \begin{equation} \begin{aligned} \mathrm{Li}_{3} \mathrm{Sb}(\text {Cubic) } \rightarrow \mathrm{Sb}(\text { Rhombohedral) } \end{aligned} \end{equation} $$

Sb-anode reaction mechanism in SIBs

The Sb anode in SIBs exhibits a symmetric reaction mechanism during discharging (sodiation) and charging (desodiation), unlike the behavior observed in LIBs[63-67]. Darwiche et al. reported that rhombohedral Sb alloyed with Na forms an amorphous intermediate NaxSb (x < 3) phase during the discharge reaction[63] owing to the sluggish kinetics associated with the crystallization of NaSb into the monoclinic structure. Subsequently, amorphous NaxSb is transformed into hexagonal Na3Sb. Conversely, during charging, Na3Sb is transformed back into amorphous NaxSb, which is recovered as rhombohedral Sb. Although XRD clearly identified Na3Sb, the NaxSb phase was not detected owing to its amorphous nature. Recent first-principles calculations performed by Caputo and Yu et al. demonstrated that the NaxSb phase corresponds to monoclinic NaSb, which is the most thermodynamically stable phase[64,65]. This theoretical prediction was further supported by the experimental results, which are demonstrated using extended X-ray absorption fine structure analysis by Yu et al., and in-situ XRD by Tian et al.[66,67]. Therefore, the suggested reaction mechanism for the Sb anode in SIBs during discharging/charging is summarized by equations (3) and (4), along with the crystallographic schematic shown in Figure 3.

During discharging:

$$ \begin{equation} \begin{aligned} \mathrm{Sb} \text { (Rhombohedral) } \rightarrow \mathrm{NaSb}(\text {Monoclinic) } \rightarrow \mathrm{Na}_{3} \mathrm{Sb} \text { (Hexagonal) } \end{aligned} \end{equation} $$

During charging:

$$ \begin{equation} \begin{aligned} \mathrm{Na}_{3} \mathrm{Sb} \text { (Hexagonal) } \rightarrow \mathrm{NaSb} \text { (Monoclinic) } \rightarrow \mathrm{Sb} \text { (Rhombohedral) } \end{aligned} \end{equation} $$

Sb-anode reaction mechanism in PIBs

Several studies have reported the K-ion reaction pathway for an Sb anode in PIBs during discharging (potassiation) and charging (depotassiation)[68-70]. The Sb reaction mechanism was investigated by Gabaudan et al. using operando XRD[68]. During discharging, rhombohedral Sb is alloyed with K to form an intermediate amorphous KxSb (x < 3) phase, which then transforms into cubic K3Sb and hexagonal K3Sb. In contrast, during charging, both cubic and hexagonal K3Sb transform back into amorphous KxSb, which is then recovered as rhombohedral Sb. To identify the amorphous KxSb phases, Zheng et al. conducted first-principles calculations based on the K-Sb binary phase diagram and cyclic voltammetry[69], while Ko et al. performed first-principles calculations along with in-situ XRD[70]. These studies demonstrated that the KSb phase is the most stable among the various intermediate KxSb phases (KSb2, KSb, and K5Sb4); however, all the three phases are difficult to crystallize due to their low phase stabilities. Notably, in-situ XRD revealed only rhombohedral Sb and cubic K3Sb, without any peaks corresponding to KxSb observed. However, the identification of the KxSb phase remains uncertain. Additionally, although the hexagonal K3Sb phase is thermodynamically stable under ambient conditions, Sb is transformed into cubic K3Sb during electrochemical testing. The proposed reaction mechanism for the Sb anode in PIBs during discharging and charging is summarized by equations (5) and (6), along with the crystallographic schematic shown in Figure 4.

During discharging:

$$ \begin{equation} \begin{aligned} \mathrm{Sb} \text { (Rhombohedral) } \rightarrow \mathrm{K}_{\mathrm{x}} \mathrm{Sb} \rightarrow \mathrm{K}_{3} \mathrm{Sb} \text { (Cubic) } \end{aligned} \end{equation} $$

During charging:

$$ \begin{equation} \begin{aligned} \mathrm{K}_{3} \mathrm{Sb}\left(\text {Cubic) } \rightarrow \mathrm{K}_{\mathrm{x}} \mathrm{Sb} \rightarrow \mathrm{Sb}\right. \text { (Rhombohedral) } \end{aligned} \end{equation} $$


Owing to its high theoretical gravimetric and volumetric capacities, Sb exhibits significant potential as an anode material for LIBs, SIBs, and PIBs [Figure 1A and B]. However, the alloying reaction with Li induces substantial volume changes and internal stresses in the Sb particles [Figure 1C], which leads to pulverization. Consequently, pulverized Sb particles inevitably form an additional SEI layer through further reactions with the electrolyte during repeated cycling, resulting in irreversible side reactions[55,71]. Therefore, researchers have proposed various strategies to address the challenges associated with excessive volume changes, including SEI layer control, structural control, and composite/alloy formation, to achieve highly stable cycling and rate capabilities [Figure 5]. This section systematically presents recent research progress focused on overcoming such drawbacks from the perspectives of SEI layer control, structural control, and composite/alloy formation.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 5. Schematic showing various strategies employed to engineer Sb anodes for LIBs, SIBs, PIBs, and ASSLIBs.

Sb-based anodes for LIBs

Sb is considered a competitive anode owing to its abundance, metallic properties, high theoretical capacity (Li3Sb: 660 mAh g-1), and moderate potential (0.5-0.8 V vs. Li+/Li). However, Sb-based anodes undergo excessive volume changes (~134%), and the continuous formation and destruction of the SEI layer result in capacity degradation and electrolyte starvation. To address these issues, recent advances in SEI layer control, structural control, and composite/alloy formation of Sb-based anode for LIB applications have been reported.

Researchers have explored the use of various solvents and salts to improve the SEI layer properties of Sb-based anodes[72-74]. Bian et al. reported incorporating fluoroethylene carbonate (FEC) into a propylene carbonate (PC) electrolyte in the LIB system[72]. This approach facilitates the construction of a stable SEI layer on a microsized Sb anode during Li cycling [Figure 6A]. Analysis using first-principles calculations, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) revealed that FEC has a lower LUMO (the lowest unoccupied molecular orbital) energy level (-0.11 eV) compared to PC (0 eV). The FEC additive decomposes ahead of PC to create a LiF-rich SEI layer on the Sb surface that suppresses continuous electrolyte decomposition and contributes to facile ion/electron transfer and structural stability during repeated cycling. Furthermore, the microsized Sb exhibited a high reversible capacity of 575 mAh g-1 and a high ICE of 81% after 70 cycles at a high current rate of 5 A g-1. Sun et al. developed a non-flammable triethyl phosphate (TEP)/1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (HFE) electrolyte to improve the stability of a bulk Sb anode [Figure 6B][73]. The solvation structures formed by lithium bis(fluoroslufonyl)imide (LiFSI)-TEP/HFE exhibited distinct dipole-dipole interactions that provided excellent kinetics and compatibility with the anode material. Therefore, the bulk Sb anode showed a highly reversible capacity of 604 mAh g-1 with a substantial capacity retention of 92% after 100 cycles at a current rate of 500 mA g-1 when evaluated using 1.2 M LiFSI in TEP/HFE as the electrolyte. Cai et al. investigated the effect of LiNO3, as an electrolyte additive, on ether-based electrolytes with the aim of stabilizing the Sb anode [Figure 6C][74]. To determine the effectiveness of the LiNO3 electrolyte additive, the Sb anode and SEI layers on the particles were investigated using SEM, XPS, and electrochemical impedance spectroscopy (EIS), which revealed that NO3- weakens the Li+-DME (dimethoxyethane) interaction, resulting in Li+-2DME-NO3- located away from the surface of the Sb anode, thereby suppressing electrolyte decomposition. The LiNO3 additive decreased the strength of the interaction between the Li ion and the DME solvent molecule and affected the Li-ion solvation/desolvation process. The pristine Sb anode exhibited an ICE of 82.5% and a reversible capacity of 624 mAh g-1 after 100 cycles at a current density of 66 mA g-1. Furthermore, a full cell with a LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode maintained a capacity of 140.8 mAh g-1 over 100 cycles without any apparent capacity loss. Therefore, selecting appropriate solvents and salts is critical for establishing stable SEI layers on Sb-based anodes in LIBs.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 6. (A) Schematic illustration and rate capabilities of microsized Sb using FEC additives[72]. (B) Schematic illustration and cyclabilities of bulk Sb using LiFSI-based electrolytes[73]. (C) Schematic illustration, rate capabilities, and cyclabilities of a pristine Sb anode using LiNO3 additives[74]. This figure is reproduced with permission from Bian et al.[72], Sun et al.[73], and Cai et al.[74].

Porous and multidimensional structural materials with high surface areas have been proposed as high-performance Sb-based anodes for LIBs[75-77]. These structured Sb anodes effectively accommodate volume changes during cycling. Liu et al. synthesized spherical Sb/C composites to address volume change during the charge/discharge process [Figure 7A][75]. The mesoporous Sb/C structure provided more Li-active sites and faster kinetics, which were attributed to the higher surface area that effectively accommodated volume changes due to the buffer effect. Consequently, the spherical Sb/C composite anode exhibited an impressive ICE of 86.7% and maintained a reversible capacity of 590 mAh g-1 after 80 cycles at a current rate of 100 mA g-1. Schulze et al. prepared an Sb/carbon nanotube (CNT) composite film anode without any conductive additive or binder to improve mechanical/electrical connectivity [Figure 7B][76]. SEM revealed that the initial morphology of the prepared film consisted of a porous bead-on-string structure. The film thickness increased by 500% during more than 100 cycles owing to volume expansion and continuous SEI layer formation. However, the Sb/CNT composite film retained mechanical and electrical connections without delamination and exhibited a stable cycling performance of 340 mAh g-1 after 100 cycles at a current rate of 100 mA g-1 without any binder or conductive additives. Luo et al. fabricated a durable LIB anode using Sb/N-C with a unique nanorod-in-nanotube structure [Figure 7C][77] with an internal void capable of accommodating volume changes upon cycling. In addition, the combination of N-doped 1D conductive carbon coating improved electronic conductivity and facilitated Li-ion diffusion. Consequently, the nanorod-in-nanotube Sb/N-C anode delivered an impressive rate capability of 343 mAh g-1 after 45 cycles at a rapid current rate of 20 A g-1. The porous structure provided additional space to accommodate volume changes during discharging and charging, whereas the robust multidimensional structure maintains both mechanical and electrical connections to improve cycling stability.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 7. (A) Schematic illustration and cyclabilities of spherical Sb/C composite anodes[75]. (B) Schematic illustration and cyclabilities of Sb/CNT composite film anodes[76]. (C) Schematic illustration and rate capabilities of a nanorod-in-nanotube-structured Sb/N-C anode[77]. This figure is reproduced with permission from Liu et al.[75], Schulze et al.[76], and Luo et al.[77].

To achieve high-performance Sb-based anodes for LIBs, various strategies involving Sb-based alloys and carbon composites have been proposed for use as high-performance Sb-based anodes in LIBs[78-88]. Zhang et al. developed an Sb/C nanosheet anode to improve cycling and rate performance [Figure 8A][78]. Encapsulating Sb nanoparticles within carbon nanosheets effectively mitigated volume expansion and particle agglomeration during cycling while simultaneously minimizing direct electrolyte exposure. The Sb/C nanosheet anode demonstrated a highly reversible capacity of 598 mAh g-1 after 100 cycles at a current rate of 200 mA g-1. Pan et al. synthesized NiSb/N-C nanosheets that delivered outstanding rates and long-life cycling performance [Figure 8B][79]. The NiSb alloy nanoparticles inserted into a matrix of N-doped carbon nanosheets provided structural stability by inhibiting direct contact between the alloy nanoparticles and the electrolyte and preventing alloy nanoparticle agglomeration during cycling. The NiSb/N-C nanosheets exhibited improved cycling and rate performance, delivering a stable capacity of 401 mAh g-1 after 1,000 cycles at a current rate of 1.0 A g-1. Yu et al. encapsulated Sb nanoparticles derived from MOFs in hollow carbon and titanium dioxide nanotubes (Sb/CTHNs) to suppress volume expansion and enhance Li+ diffusion [Figure 8C][80]. The Sb/CTHNs provide a large surface area and pathways for Li-ion diffusion and electron transport. The robust hollow structure accommodated volume expansion during the alloying/dealloying process, resulting in a stable SEI layer and a high rate capability of 374.1 mAh g-1 at a current rate of 5.0 A g-1. Yang et al. fabricated a CoSb nanocomposite anchored on Swiss-cheese-like nitrogen-doped porous carbon (CS/NPC), which delivered stability and a high rate capability [Figure 8D][81]. The specific structure contributed to enhanced electronic conductivity, a shorter ion-diffusion distance, and suppressed Sb volume changes during repeated cycling. The CS/NPC anode exhibited a high rate capability of 343 mAh g-1 at a current rate of 10 A g-1. The strong metal-N-C bonds formed by the doped heteroatoms provided sufficient active sites for Li ions and strengthened interfacial adhesion between the active materials and the current collector. Coquil et al. reported ternary ZnSnSb2 as a new LIB anode material [Figure 8E][82]. The ZnSnSb2 anode exhibited a reversible capacity of 615 mAh g-1 with a capacity retention of 84.2% after 200 cycles when evaluated galvanostatically at a current rate of 252 mA g-1; this high electrochemical performance is attributable to the distinctive quasi-topotactic reaction mechanism associated with ZnSnSb2 during lithiation/delithiation. Su et al. synthesized a NiSb alloy embedded in N-doped carbon (NiSb/C) to enhance the electrochemical performance of Sb-based anodes for LIBs[83]. The NiSb/C anode exhibited good cycling stability and high rate performance, with the elemental Ni suppressing volume expansion and the N-doped carbon serving as a conductive network with sufficient active sites. Consequently, the NiSb/C anode demonstrated a reversible capacity of 426 mAh g-1 after 450 cycles at a current rate of 2 A g-1. In short, carbon-based composite materials effectively suppress volume expansion and improve electron/ion diffusion characteristics, resulting in enhanced cycling stability and rate capabilities. Alloy materials have also been reported to exhibit less volume expansion during charging and discharging owing to their unique insertion or conversion reaction mechanisms. Regarding the electrolyte, the FEC additive was found to be essential. An unprecedented LiFSI salt was applied to an Sb anode, and its performance was evaluated. Recent LIB studies have transcended simple approaches. Instead of focusing on a single breakthrough, researchers have reported significant performance enhancements by combining multiple effective improvements. This trend highlights the need to engineer complex and advanced anode materials for next-generation LIBs. Regarding the electrolyte, the FEC additive was found to be essential, and a promising LiFSI salt was evaluated with the Sb-based anode. Table 2 summarizes recent advancements in Sb-based LIB anodes.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 8. (A) Schematic illustration and cyclability of an Sb/C nanosheet anode[78]. (B) Schematic illustration and cyclability of a NiSb/N-C nanosheet anode[79]. (C) Schematic illustration and rate capability of an Sb/CTHN anode[80]. (D) Schematic illustration and rate capability of a CS/NPC anode[81]. (E) Schematic illustration and rate capability of a ZnSnSb2 anode[82]. This figure is reproduced with permission from Zhang et al.[78], Pan et al.[79], Yu et al.[80], Yang et al.[81], and Coquil et al.[82].

Table 2

Li-storage properties of Sb-based LIB anodes

MaterialElectrolyteBinderICE (%)Cyclability after the Xth cycle
(mAh g-1)
Rate capabilityRef.
(A g-1)
(mAh g-1)
Micro-sized Sb1.0 M LiPF6PC with 10 vol% FECCMC81.0540 (X = 150)5.0575[72]
Bulk Sb1.2 M LiFSITEP:HFE = 1:3 mol%PAA/CMC87.5648 (X = 50)0.5604[73]
Pristine Sb3.0 M LiFSI +
0.4 M LiNO3
DOL:DME = 1:1 vol%PAA/CMC82.5624 (X = 100)3.3487[74]
Spherical Sb/C1.0 M LiPF6EC:DMC = 1:1 vol% with 5 vol% FECAlginate86.7590 (X = 80)1.2535[75]
Sb/CNT composite film1.0 M LiPF6EC:DEC = 3:7 vol%Binder-free78.7340 (X = 100)3.2300[76]
Nanorod-in-nanotube Sb/N-C1.0 M LiPF6EC:DMC:EMC = 1:1:1 vol% with 10 wt% FECCMC78.3346 (X = 3,000)20.0343[77]
Sb/carbon nanosheets1.0 M LiPF6EC:DMC = 1:1 vol%PVDF62.5598 (X = 100)2.0449[78]
NiSb/N-C nanosheets1.0 M LiPF6EC:DMC = 1:1 vol%PTFE71.8401 (X = 1,000)5.0252[79]
Sb/CTHNs1.0 M LiPF6EC:DEC = 1:1 vol% with 5 vol% FECPVDF52.4607 (X = 100)5.0435[80]
CS/NPC1.0 M LiPF6EC:DEC:DMC = 1:1:1 vol%CMC52833 (X = 3,000)10.0343[81]
ZnSnSb21.0 M LiPF6PC:EC:DMC = 1:1:3 vol% with 5 vol% FEC + 1 vol% VCCMC83.0615 (X = 200)0.63650[82]
NiSb/C1.0 M LiPF6EC:DEC = 1:1 vol% with 5 vol% FECAlginate68.5500 (X = 200)2.0426[83]
NiSb/C nanosheets1.0 M LiPF6EC:DEC = 1:1 vol%PVDF64.1405 (X = 1,000)2.0305[84]
Sb/rGO1.0 M LiPF6EC:DMC = 1:1 vol%PVDF52.3798 (X = 200)0.43563[85]
silica-reinforce Sb/CNF1.0 M LiPF6EC:DMC = 1:1 vol%PAA66.4700 (X = 400)1.0468[86]

Sb-based SIB anodes

Sb has been extensively researched as a high energy density SIB anode material due to its high Na-storage capacity (Na3Sb: 660 mAh g-1) and appropriate operating voltage (0.3-0.7 V vs. Na+/Na). However, Sb anodes exhibit drawbacks similar to those of LIBs, including the formation of unstable SEI layers, significant volume changes (~291%), and sluggish charge transfer during discharging and charging, resulting in poor cycling stability. To address these issues, recent advances in SEI layer control, structural control, and composite/alloy formation have been proposed for Sb-based anodes for SIBs.

Electrolyte additives significantly affect the formation of a stable SEI layer, which is closely related to the electrochemical performance of the Sb anode[72,89,90]. Lu et al. investigated the surface structure, composition, and electrochemical performance of Sb-based anodes (SiC-Sb-C) in FEC-free and FEC-containing electrolytes using XPS, Fourier transform infrared spectroscopy (FTIR), EIS, and electrochemical characterization techniques [Figure 9A][89]. Carbonate solvents (EC and DEC) gradually decompose on the SiC-Sb-C particle surface in the FEC-free electrolyte to form an SEI layer composed of Na2CO3, ROCO2Na, and RONa units. The precipitate layers formed from these salts are generally loose, forming thick SEI layers. FEC-containing electrolyte is more reactive than EC or DEC-containing electrolyte; it decomposes first on the particle surface to form a dense and thin SEI layer composed of fluorine (F)-containing salts, such as NaF, F-ROCO2Na, and F-RONa. Although a F-containing SEI film can inhibit the decomposition of EC and DEC to a certain extent, EC and DEC still decompose along with FEC at low potentials (below 0.5 V vs. Na+/Na), resulting in the formation of a double-layer SEI film. The formation of a dense and thin double-layer SEI film improves the electrochemical performance of the Sb anode. Bian et al. investigated the effect of the FEC additive on the Sb anode for SIBs [Figure 9B][72]. The optimal concentration of FEC (10 vol%) provides a stable and NaF-rich SEI layer that alleviates Sb volume changes and inhibits continuous electrolyte decomposition. Consequently, the microsized Sb anode with an FEC-containing electrolyte exhibited a reversible capacity of 540 mAh g-1 with a retention of 85.3% after 150 cycles at 200 mA g-1. Bodenes et al. revealed the role that binders play in determining the thickness, homogeneity, and chemical composition of the SEI layer formed on the surface of the Sb anode in a SIB system using XPS and electrochemical testing[90]. Sb was detected in the Sb 3d XPS spectrum of the Sb-carboxymethyl cellulose (CMC) anode in the fully desodiated state, consistent with the partial redissolution of the SEI layer (dissolution of Na2O/NaOH). In contrast, Sb was not detected on the Sb-PVDF anode in the fully desodiated state because the SEI layer covering the Sb anode was more than 5 nm thick. Therefore, a more uniform and thinner SEI layer was formed in the case of the Sb-CMC anode compared to the Sb-PVDF anode, resulting in superior electrochemical performance [Figure 9C].

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 9. (A) Schematic illustration of the SEI layer formation mechanism and the cyclabilities of Sb-based anodes in FEC-free and FEC-containing electrolytes[89]. (B) Schematic illustration, cyclabilities, and rate capabilities associated with morphological changes experienced by micro-sized Sb anodes in FEC-free and 10 vol% FEC-containing electrolytes[72]. (C) XPS results and cyclabilities of Sb-CMC anodes[90]. This figure is reproduced with permission from Bian et al.[72], Lu et al.[89], and Bodenes et al.[90].

Nanostructural design and low-dimensional engineering aimed at accelerating reaction kinetics are considered the most efficient strategies for addressing the abovementioned drawbacks, including the sluggish rate capability and rapid capacity decay associated with the excessive volume change experienced by Sb[67,91-96]. Liu et al. fabricated highly uniform Sb nanotubes (NTs) using a galvanic replacement approach using a Cu2Sb-mediated formation mechanism[91]. The Sb NT anode delivered a reversible capacity of 546 mAh g-1 after 100 cycles with a capacity retention of 98.7% at 0.1 A g-1 and excellent long-term cycling stability at 1.0 A g-1 (342 mAh g-1 after 6,000 cycles with a capacity retention of 74%) [Figure 10A]. The excellent Na-storage performance of the Sb NTs was attributed to the one-dimensional hollow structure, which effectively relieves structural deformation and shortens the ion-diffusion path, thereby improving the Na-ion diffusion kinetics. Tian et al. synthesized two-dimensional few-layer antimonene (2D FLA) nanosheets via liquid-phase exfoliation of β-antimony in a 1:1 mixture of N-methyl pyrrolidone (NMP) and ethanol[67]. The 2D FLA anode maintained a stable capacity of 620 mAh g-1 after 150 cycles at 0.5 C (330 mA g-1) along with a capacity retention of 99.7% from cycles 10 to 150 [Figure 10B]. Fast Na-ion diffusion in 2D FLA was attributed to the small diffusion barrier of 0.14 eV, and its ability to efficiently accommodate anisotropic volume expansion along the a/b plane during cycling, thereby achieving high structural stability. Liu et al. synthesized a yolk-shell Sb/graphdiyne (GDY) nanobox with an inner void space as an anode material using a galvanic replacement reaction [Figure 10C][92]. The voids accommodate Sb volume changes, and the GDY shell, with its intrinsic in-plane cavities, facilitates Na-ion diffusion. This anode delivered a capacity of 593 mAh g-1 at 100 mA g-1, with little loss of capacity observed after 200 cycles. The Sb/GDY nanobox anode was subjected to full-cell testing with Na3V2(PO4)3. The full cell delivered a capacity retention of 75% and a capacity of 354 mAh g-1anode after 500 cycles at 1 A g-1anode. The stable cycling performance of the spherical Sb/C anode is a result of its finely organized nanostructure that effectively accommodates volume changes and inhibits Sb-nanoparticle agglomeration. Li et al. designed a 3D porous carbon matrix containing Sb nanoparticles (Sb/3DPC) through polymer blowing and the use of a galvanic replacement method[93]; this architecture provided an enlarged electrode/electrolyte interface owing to its large pore volume and surface area, which shortened the Na-ion transfer path and inhibited volume expansion. The Sb/3DPC anode showed superior cycling stability, namely, 461 mAh g-1 over 200 cycles at 100 mA g-1 with a capacity retention of ~66% and an excellent rate capability of 346 mAh g-1 at 5 A g-1 [Figure 10D]. Chen et al. prepared yolk-shell-structured Sb@C using a continuous one-pot multistep strategy, with the Sb nanoparticles confined to the N and S co-doped 3D porous carbon microspheres (Sb/NS-3DPCMSs)[94]. Remarkably, the Sb/NS-3DPCMS anode exhibited a specific capacity of 331 mAh g-1 after 10,000 cycles at 20 A g-1 with almost 100% capacity retention [Figure 10E]. The robust yolk-shell structure provided sufficient space to effectively relieve the volume expansion experienced by Sb and stabilized the 3D architecture during long-term cycling. Furthermore, empty carbon boxes with rich hierarchical pores and high conductivities exhibited excellent rate performance by promoting fast Na-ion/electron transfer. Li et al. synthesized various multidimensional Sb nanostructures as SIB anode materials using a chemical dealloying approach[95]. The 0D Sb nanoparticles (Sb-NPs), 2D Sb nanosheets (Sb-NSs), and 3D nanoporous (NP) Sb were synthesized by modifying the dealloying reaction kinetics using different etching solvents. Among the various nanostructures, the Sb-NS anode showed a high reversible capacity of 620 mAh g-1 after 100 cycles, with a capacity retention of 90.2% at 100 mA g-1. Furthermore, the Sb-NS anode delivered high rate capabilities at various current densities in the 100-6,400 mA g-1 range. The excellent electrochemical performance of the 2D nanostructure is ascribable to its high Na-ion availability, robust structural unity, and fast reaction kinetics. Yang et al. also fabricated 0D Sb nanoparticles, 2D antimonene nanosheets, and 3D porous Sb networks by electrochemically delaminating bulk Sb and exploiting varying reaction mechanisms in distinct electrolytes[96]. The 2D antimonene nanosheet anode delivered a high reversible capacity of 572.5 mAh g-1 after 200 cycles at 0.2 A g-1 (capacity retention: 91.5%) and a superior rate capability of 553.6 mAh g-1 at 5 A g-1. Among these multidimensional strategies, the use of 2D shapes is particularly well-suited for accommodating the volume expansion experienced by Sb anodes in SIBs.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 10. (A) TEM images of Cu nanowires as sacrificial templates and the performance of Sb NTs synthesized by galvanic replacement[91]. (B) Schematic illustration and atomic structure of 2D few-layer antimonene, and the cyclability of a 2D few-layer antimonene anode[67]. (C) Schematic illustration, cyclabilities, and rate capabilities of a full cell with a yolk-shell Sb/graphdiyne nanobox anode[92]. (D) Schematic illustration of the fabrication of a 3D porous Sb/C anode and its rate capabilities[93]. (E) Schematic illustration and cyclability of a yolk-shell Sb/NS-3DPCMSs anode[94]. This figure is reproduced with permission from Tian et al.[67], Liu et al.[91],Liu et al.[92], Li et al.[93], and Chen et al.[94].

Sb-based alloys and carbon composites have also been proposed in the SIB system to achieve high performance by effectively mitigating the significant volume changes experienced by Sb during sodiation/desodiation[97-104]. Ma et al. synthesized an ultrafine mesoporous Sb2O3@Sb nanocomposite using a one-step dealloying reaction and a two-phase Mg-Sb precursor[97]. The mesoporous Sb2O3@Sb anode exhibited a high specific capacity of 659 mAh g-1 in the second cycle, long-term cycling stability (a capacity retention of 99.8% after 200 cycles at 0.2 A g-1), and an excellent rate capability (200 mAh g-1 at 29.7 A g-1) [Figure 11A]. Xie et al. developed an Sb@NGA-CMP composite comprising ultrafine Sb nanoparticles uniformly anchored in the pores of a covalent organic framework (COF) using an in-situ synthetic strategy[98]. To facilitate COF formation, Sb3+ was introduced as a catalyst and subsequently immobilized in the COF channels through reduction. This unique architecture provided electronic interactions between Sb nanoparticles and π-conjugated microporous polymers (CMPs) through nitrogen groups, thereby accelerating charge transfer along the COF. The Sb@NGA-CMP composite anode exhibited a high rate capability of 223 mAh g-1 at 2 A g-1, and 188 mAh g-1 at 5 A g-1, and excellent Na storage performance of 320 mAh g-1 after 160 cycles at 0.2 A g-1 [Figure 11B]. Zheng et al. developed a cauliflower-shaped Sb/NiSb composite by an electrodeposition process[99]. The cauliflower-like structure enhanced electron transfer and shortened the Na-ion transport length, while the inactive Ni contributed to high conductivity and suppressed significant volume changes during cycling. These factors collectively contributed to stable cycling performance (521 mAh g-1 after 100 cycles with a capacity retention of 96% at 100 mA g-1) and a high rate capability (above 400 mAh g-1 at 2,000 mA g-1) [Figure 11C]. Ma et al. synthesized a bimetallic single-phase NP SnSb alloy by dealloying a ternary Mg-Sn-Sb precursor[100]. The NP-SnSb-alloy anode delivered a specific capacity of 506.6 mAh g-1 after 100 cycles with a capacity retention of 94.5% at 0.2 A g-1 and 457.9 mAh g-1 after 150 cycles at 1.0 A g-1 (capacity retention: 95.5%); in addition, it exhibited a superior rate capability with a specific capacity of 458.5 mAh g-1 at 10 A g-1 [Figure 11D]. Gao et al. fabricated nanoporous (np) Bi-Sb alloys (Bi2Sb6, Bi4Sb4, and Bi6Sb2) by one-step dealloying ternary Mg-based precursors[101]. The np-Bi2Sb6-alloy anode showed the best cycling stability, exhibiting a specific capacity of 257.5 mAh g-1 after 2,000 cycles at 200 mA g-1, which corresponds to a capacity loss of 0.027% per cycle. Notably, the np-Bi2Sb6 anode exhibited remarkable long-term cycling performance, even at 1 A g-1, maintaining a specific capacity of 150 mAh g-1 after 10,000 cycles with a capacity decay of 0.0072% per cycle [Figure 11E]. The outstanding electrochemical performance of np-Bi2Sb6 is attributable to its NP structure with an optimal Bi/Sb atomic ratio; this structure not only alleviated the volume expansion of the active material but also effectively promoted electrolyte permeation and the transfer of electrons and ions. Pan et al. prepared watermelon-like nanostructures composed of Sb nanocrystals dispersed in amorphous TiPOx (c-Sb@a-TiOx) by hydrolyzing tetrabutyl titanate in the presence of SbPO4 nanorods, followed by calcination[102]. The c-Sb@a-TiOx anode delivered a specific capacity of 147 mAh g-1 after 1,000 cycles at 1.0 A g-1 with a capacity retention of 82%. In a similar manner to that observed for LIBs, composite materials with carbon effectively suppress volume expansion, improve electron/ion diffusion, and enhance cycling stability and rate capability. Alloy materials, with their unique reaction mechanisms (insertion or conversion reactions), also exhibit less volume expansion during charging and discharging. Various approaches that are similar to those used for LIBs have been reported for alleviating the significant volume changes experienced by Sb anodes in SIBs. Recent research revealed that structural engineering and composite/alloy approaches are also effective for SIBs. Additionally, an optimal combination of electrolyte composition and additives, including FEC, was determined to facilitate the formation of a stable SEI layer. Recent advances in Sb-based anodes for SIBs are summarized in Table 3.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 11. (A) Schematic illustration of the fabrication process, cyclability, and rate capability of a mesoporous Sb2O3@Sb nanocomposite anode[97]. (B) Schematic illustration of the fabrication process and rate capability of an Sb@NGA-CMP composite anode[98]. (C) Schematic illustration, XRD patterns, cyclability, and rate capability of an electrodeposited Sb/NiSb composite anode[99]. (D) Schematic illustration of the one-step dealloying process used to prepare the NP-SnSb alloy anode, along with its cyclability and rate capability[100]. (E) Structure and cyclability of a ligament-channel np-Bi-Sb alloys anode[101]. This figure is reproduced with permission from Ma et al.[97], Xie et al.[98], Zheng et al.[99], Ma et al.[100], and Gao et al.[101].

Table 3

Na-storage properties of Sb-based anodes for SIBs

MaterialElectrolyteBinderICE (%)Cyclability after the Xth cycle
(mAh g-1)
Rate capabilityRef.
(A g-1)
(mAh g-1)
Sb nanotubes1.0 M NaClO4EC:DMC = 1:1 vol% with 5 vol% FECCMC71.0342 (X = 6,000)0.1546[91]
Few-layer antimonene1.0 M NaClO4EC:DEC = 1:1 vol% with 5 vol% FECCMC64.7620 (X = 150)0.33400[67]
Spherical Sb/C1.0 M NaClO4EC:PC = 1:1 vol% with 5 vol% FECAlginate66.9502 (X = 150)1.2340[75]
Sb/graphdiyne nanobox1.0 M NaClO4EC:DMC = 1:1 vol% with 5 vol% FECCMC45.6325 (X = 8,000)10.0294[92]
3D porous Sb/C1.0 M NaClO4PC with 5 wt% FECPVDF38.0461 (X = 200)5.0349[93]
Yolk-shell Sb/NS-3DPCMSs1.0 M NaClO4PC with 5 wt% FECCMC48.1540 (X = 150)20331[94]
Sb nanosheets1.0 M NaPF6EC:DEC = 1:1 vol% with 5 vol% FECPAA/CMC62.4559 (X = 100)5.0359[95]
2D antimonene nanosheet1.0 M NaPF6EC:DMC = 1:1 vol% with 5 vol% FECCMC77.0642 (X = 200)5.0554[96]
Sb2O3/Sb1.0 M NaClO4PC with 5 vol% FECCMC67.9659 (X = 200)0.3200[97]
Sb/COF1.0 M NaClO4EC:DMC = 1:1 vol% with 5 vol% FECAlginate58.5320 (X = 160)1.0344[98]
Sb/NiSb1.0 M NaClO4EC:PC = 1:1 vol% with 5 vol% FECBinder-free86.0521 (X = 100)2.0400[99]
Nanoporous SnSb1.0 M NaClO4PC with 5 wt% FECPVDF58.0507 (X = 100)1.0458[100]
Bi2Sb61.0 M NaClO4PC with 5 wt% FECCMC69.8258 (X = 2,000)1.0150[101]
Sb/TiPOx1.0 M NaClO4PC with 3 wt% FECAlginate42.3286 (X = 100)1.0147[102]

Sb-based PIB anodes

Sb is accomplished prospective candidate as high-capacity PIB anodes owing to its high theoretical gravimetric and volumetric capacities (660 mAh g-1 and 4,420 mAh cm-3) compared to those of graphite (279 mAh g-1 and 631 mAh cm-3), Si (954 mAh g-1 and 2,223 mAh cm-3), and Sn (226 mAh g-1 and 1,652 mAh cm-3), as summarized in Table 1. However, Sb experiences substantial volume changes of up to 405.7% (K3Sb) in a PIB, which is higher than those of graphite (63.1%, KC8), Si (216.7%, KSi), and Sn (180.8%, KSn). Therefore, alleviating these volume changes is crucial for realizing high-capacity Sb-based anodes. In this section, we briefly summarize recent studies related to various strategies aimed at achieving high-capacity Sb anodes for PIBs, including SEI layer control, structural control, and composite/alloy formation.

To confirm the effects of forming an artificial SEI layer, we introduce several relevant studies based on their high electrochemical performance[105-107]. Zhang et al. reported effective electrolytes, including potassium hexafluorophosphate (KPF6) and potassium bis(fluorosulfonyl)imide (KFSI) salts, using Sb-, Bi-, and Sn-based PIB anodes [Figure 12A][105]. Generally, the KPF6 electrolyte contributes to the formation of an unstable SEI layer, which is incapable of protecting against electrolyte decomposition during repeated cycling. In contrast, the KFSI electrolyte provides a stable SEI layer with superior mechanical and electrical properties on the surface of the active material; this stable SEI layer effectively protects against electrolyte decomposition by reducing side reactions and providing smooth K-ion pathways, which is ascribable to the layers formed on the surfaces of the active materials. Based on the effect of the KFSI electrolyte, the Sb/C anode exhibited stable cycling performance with a reversible capacity of 470 mAh g-1 using 1 M KFSI in EC/DEC as the electrolyte after 50 cycles. Zhou et al. reported an optimal K-ion electrolyte for high-performance Sb in PIB systems, which was obtained by tuning the electrolyte composition (i.e., anion, solvent, and concentration) [Figure 12B][106]. The proposed electrolyte (4 M KFSI in DME) contributed to the excellent cycling performance of the Sb anode, with an extremely high reversible capacity of 628 mAh g-1 obtained after 100 cycles at a current rate of 100 mA g-1. This performance is ascribable to the powerful interaction between FSI- and K+ at the bulk Sb electrode surface in DME. Du et al. proposed an ether-based electrolyte to accommodate the volume change experienced by the Sb anode in a PIB during cycling [Figure 12C][107]. The KFSI electrolyte in ethylene glycol diethyl ether (EGDE) contributed to the outstanding cycling performance owing to its enhanced maximum elastic strain. In addition, the EGDE electrolyte suppressed the pulverization of Sb particles and prevented the formation of an additional SEI layer. Consequently, the Sb anode exhibited a reversible capacity of ~573 mAh g-1 with a capacity retention of nearly 100% after 180 cycles at a current rate of 100 mA g-1 using the EGDE electrolyte. In short, an effective SEI layer was formed by the optimal combination of the KFSI salt and the DME and EGDE solvents, thereby contributing to the excellent cycling characteristics associated with the chemical and mechanical properties of the SEI layer.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 12. (A) Schematic illustration and cyclabilities of an Sb/C anode using KPF6- and KFSI-salt-based electrolytes[105]. (B) Schematic illustration and cyclabilities of a pristine Sb anode using carbonate and ether-based electrolytes[106]. (C) Schematic illustration and cyclability of a commercial Sb anode using an EGDE-based electrolyte[107]. This figure is reproduced with permission from Zhang et al.[105], Zhou et al.[106], and Du et al.[107].

Various approaches involving multidimensional structures have been reported for structural control of Sb-based anodes in PIBs[108-112]. Shi et al. developed a flower-like Sb4O5Cl2 cluster, which was prepared by a hydrothermal method, for PIB use [Figure 13A][108]. The flower-like structure provides diffusion paths for K ions inserted in parallel along its plane. Furthermore, a flower-like Sb4O5Cl2 anode exhibited high reversible capacities of 530, 316, and 150 mAh g-1 at rates of 50, 100, and 150 mA g-1, respectively. Liu et al. suggested the use of honeycomb-like porous microsized layered Sb (porous-Sb) [Figure 13B][109]; the porous Sb was prepared using a template-free hydrothermal method with deionized water. The honeycomb-like porous structure not only provided efficient K-ion transport but also extra space for accommodating volume changes. Based on its structural benefits, porous-Sb exhibited good electrochemical cycling stability with an initial reversible capacity of 655.5 mAh g-1 and a capacity retention of 84% after 80 cycles at a current rate of 50 mA g-1. Imtiaz et al. reported Sb deposited on a Cu15Si4 (Sb/Cu15Si4) nanowire array as an anode, which was synthesized by high-boiling-solvent-mediated vapor-solid-solid growth, with the aim of enhancing the electrochemical performance of Sb [Figure 13C][110]. The Sb/Cu15Si4 nanowire contributed to the outstanding electrochemical performance owing to its mechanically robust, highly stable, and distinctive structure. Furthermore, the Sb/Cu15Si4 nanowire anode exhibited a high initial reversible capacity of 647.9 mAh g-1 at a current rate of 50 mA g-1 and good cycling performance, with a capacity retention of 65% over 1,250 cycles at a high 200 mA g-1 rate. Guo et al. proposed an MXene-based aerogel containing single Sb atoms, quantum dots, and graphene oxide (Sb-SQ@MA) [Figure 13D][111], which was chemically synthesized using few-layered MXene (Ti3C2Tx), graphene oxide (GO), and SbCl3 as precursors. The high electrochemical performance of Sb-SQ@MA was achieved through improved charge-transfer kinetics, enhanced K-storage capability, structural stability, and highly efficient electron transfer. The Sb-SQ@MA anode exhibited a stable capacity retention of 94% with a high reversible capacity of 314 mAh g-1 after 1,000 cycles at a fast current density of 1 A g-1. Consequently, various structural controls have contributed to the stable high rate capability and cycling performance of Sb-based PIB anodes owing to their distinctive structural characteristics that accommodate volume expansion or facilitate K-ion diffusion. He et al. fabricated a 3D macroporous Sb@C composite (Sb@C-3DP) using a simple KCl template [Figure 13E][112]; Sb@C-3DP showed a reversible capacity of 516 mAh g-1 at 50 mA g-1, an ICE of 76.2%, and delivered a capacity retention of 97% after 260 cycles at 500 mAh g-1. A full cell with a Prussian blue cathode delivered a reversible capacity of 508 mAh g-1 (based on anode mass) at a current rate of 0.2 A g-1.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 13. (A) Schematic illustration and cyclability of a flower-like Sb4O5Cl2 PIB anode[108]. (B) Schematic illustration and cyclability of a honeycomb-like porous Sb anode for PIBs[109]. (C) Schematic illustration and cyclability of an Sb/Cu15Si4 nanowire anode for PIBs[110]. (D) Schematic illustration and cyclability of an Sb quantum dot/MXene-based aerogel PIB anode[111]. (E) Schematic illustration, cyclability, and rate capability of a full cell with a 3D macroporous Sb/C composite anode[102]. This figure is reproduced with permission from Shi et al.[108], Liu et al.[109], Imtiaz et al.[110], Guo et al.[111], and He et al.[112].

Various strategies, such as alloy or composite formation, have been extensively studied for improving the electrochemical properties of Sb anodes for PIBs[12,69,70,105,110-119]. Zheng et al. designed Sb nanoparticles encapsulated in an interconnected carbon-sphere network (Sb/CSN) via an electrospray-assisted strategy [Figure 14A][69]. The uniformly dispersed nano-Sb within the porous spherical network mitigated the volume change experienced by Sb. In addition, the highly concentrated electrolyte formed a robust KF-rich SEI on the Sb/CSN surface. Synergy between this interesting structure and the robust SEI greatly enhanced the electrochemical performance of the Sb/CSN anode, which maintained a reversible capacity of 504 mAh g-1 after 220 cycles at 200 mA g-1. Shi et al. encapsulated Sb nanoparticles in N-, S-, and F-co-doped carbon skeletons (Sb/NSF-C) using a hydrothermal method, heat treatment, and etching [Figure 14B][113]. Doping changes the electronic configuration, resulting in defects in the carbon layers. This 3D porous structure is highly mechanically strong and contributes to enhancing the electrochemical reaction kinetics. After 200 cycles, the Sb/NSF-C composite retained a reversible capacity of 287 mAh g-1 at a current rate of 1.0 A g-1. Han et al. embedded Sb nanocrystals in an ultrathin carbon nanosheet (Sb/CNS) using a one-step solvothermal reaction [Figure 14C][114]. The mechanical stability of the nanosheet accommodated volume changes and suppressed side reactions involving the electrolytes. Moreover, the large surface area of the nanosheet contributed to fast ionic/electronic diffusion. Consequently, a reversible capacity of 247 mAh g-1 and up to 90% capacity retention were attained after 600 cycles at 200 mA g-1. Cao et al. created a flexible integrated anode by confining Sb nanoparticles in porous carbon nanofibers (Sb/C PNFs) using an electrospin-assisted strategy [Figure 14D][115]. The vessel-like channels in the 3D interconnecting carbon nanofibers promoted electrolyte flow and shortened the the K+ diffusion way of the uniform Sb nanoparticles. The flexible porous carbon nanofibers function as a buffer matrix that mitigates volume expansion while simultaneously providing pathways for rapid electron transfer. As a result, a reversible capacity of 264.0 mAh g-1 was attained after 500 cycles at 2.0 A g-1. Xiong et al. fabricated a BiSb/C composite nanosheet by embedding Bi-Sb alloy nanoparticles inside a porous carbon matrix via freeze-drying and pyrolysis [Figure 14E][116]. The BiSb alloy mitigated volume changes owing to the similar physicochemical properties and infinite miscibility of Bi and Sb. Furthermore, the carbon effectively buffered the volume change of the BiSb alloy nanoparticles during cycling. The BiSb/C anode exhibited a reversible capacity of 320 mAh g-1 with a high capacity retention of 97.5% after 600 cycles at 500 mA g-1. Diverse approaches have been explored to address the substantial volume changes experienced by Sb-based PIB anodes, including SEI layer control, structural control, and composite/alloy formation. Except for SEI layer control, these methods parallel the techniques used for LIBs and SIBs. While FEC additives are well-known for improving the performance LIBs and SIBs, their impact on PIBs remains controversial[120,121]. Using FEC as an additive for an anode in a half-cell system dramatically reduced the ICE while increasing the chemical and cycling stabilities of the system, demonstrating a trade-off relationship. Although a few studies have validated the potential of the FEC additive in various PIB systems, its application to Sb-based anodes remains unexplored. Therefore, the role of FEC in an Sb-based PIB anode requires further investigation. Recent progress in Sb-based PIB anodes is summarized in Table 4.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 14. (A) Schematic illustration, SEM image, and cycling performance of an Sb/CSN PIB anode[69]. (B) Schematic illustration, SEM image, and cycling performance of an Sb/NSF-C PIB anode[113]. (C) Schematic illustration and rate performance of an Sb/CNS PIB anode[114]. (D) Schematic illustration, SEM images, and cycling performance of an Sb/C PNF PIB anode[115]. (E) Schematic illustration, SEM image, and cycling performance of a BiSb/C PIB anode[116]. This figure is reproduced with permission from Zheng et al.[69], Shi et al.[113], Han et al.[114], Cao et al.[115], and Xiong et al.[116].

Table 4

K storage properties of Sb-based PIB anodes

MaterialElectrolyteBinderICE (%)Cyclability after the Xth cycle (mAh g-1)Rate capabilityRef.
(A g-1)
(mAh g-1)
Sb/C1.0 M KFSIEC:DEC = 1:1 vol%CMC64.6470 (X = 50)--[105]
Pristine Sb4.0 M KFSIDMEPAA/CMC74.2628 (X = 100)3.0305[106]
Commercial Sb1.0 M KFSIethylene glycol diethyl etherCMC69.4573 (X = 180)0.5443[107]
Flower-like Sb4O5Cl23.0 M KFSIEC:DEC = 1:1 vol%PVDF27.8190 (X = 40)0.5105[108]
Honeycomb-like porous Sb4.0 M KFSIDMEPAA74.4551 (X = 80)2.0442[109]
Sb/Cu15Si4 nanowire4.0 M KFSIDMEBinder-free76.0250 (X = 1,250)4.0105[110]
Sb QD/ MXene aerogel1.0 M KPF6EC:PC = 1:1 vol%CMC47.7521 (X = 106)3.2246[111]
3D macroporous Sb/C 5.0 M KFSIDMECMC76.2342 (X = 260)6.4176[112]
Nanoporous Sb0.8 M KPF6EC:DEC = 1:1 vol%CMC71.0318 (X = 50)0.5265[12]
Sb/CSN4.0 M KTFSIEC:DEC = 1:1 vol%Alginate61.0551 (X = 100)0.2504[69]
Sb/C/rGO0.8 M KFSIEC:DEC = 1:1 vol%CMC46.3310 (X = 100)1.5110[70]
Sb/NSF-C5.0 M KFSIDMECMC55.1363 (X = 200)1.0287[113]
Sb/CNS1.0 M KPF6EC:DMC = 1:1 vol%CMC48.0247 (X = 600)2.0101[114]
Sb/C PNFs1.0 M KPF6EC:DEC = 1:1 vol%PMMA71.3264 (X = 500)5.0208[115]
BiSb/C5.0 M KFSIDMEAlginate70.2320 (X = 600)2.0152[116]
Sb0.25Bi0.75/C3.0 M KFSIDMEPVDF45.0302 (X = 500)0.5276[117]
Layered Sn-Sb4.0 M KFSIEMCCMC68.0296 (X = 150)5.0118[118]
Sb/rGO0.8 M KPF6EC:DEC = 1:1 vol%CMC49.3300 (X = 40)0.5210[119]

Sb-based ASSLIB anodes

Although solid electrolytes provide significant advantages in terms of rigidity, thermal stability, and nonflammability, the direct utilization of Li-metal anodes can induce dendrite formation resulting in short circuits, which remains a critical challenge for ASSLIB development[122]. To address this issue, alloy-based anodes that do not form dendrites have been considered. Lewis et al. investigated the critical differences in the SEI layer formation dynamics of LIBs and ASSLIBs, emphasizing the potential benefits of alloy anodes[123]. Due to its immobility, the solid electrolyte in an ASSLIB inhibits excessive SEI layer formation and subsequent electrolyte depletion during continuous cycling. Therefore, alloy-based anodes form mechanically and chemically denser and more stable SEI layers compared to those of LIBs.

Several studies have reported Sb-based anodes for ASSLIBs using oxide- and boride-based solid electrolytes[124-129]. Afyon et al. fabricated an Sb composite anode by dropping a slurry of Sb, Li6.25Al0.25La3Zr2O12 (LLZO), carbon black, and poly(vinylidene fluoride (PVDF) onto the surfaces of LLZO pellets (Sb/LLZO/C) [Figure 15A][124]. The Sb/LLZO/C composite anode exhibited a reversible capacity of 230 mAh g-1 with 99.9% retention after 250 cycles at a rate of 240 mA g-1 and an operating temperature of 95 °C. This study demonstrated the superior cycling stability and fast rate capability of Sb-based anodes in oxide-type ASSLIBs. Sb-based anodes have predominantly been reported for ASSLIBs that use boride-based solid electrolytes. Mo et al. demonstrated that the Sb/LiBH4 solid interfacial contact properties gradually deteriorated owing to the excessive volume change experienced by Sb [Figure 15B][125]. Therefore, a GaSb/LiBH4/C composite anode was designed by introducing liquid Ga metal into the Sb anode to increase interfacial compatibility between the electrode and the solid electrolyte, accommodate volume changes, and promote electron and ion diffusion. The composite anode exhibited a reversible capacity of 400 mAh g-1 with a capacity retention of 98.6% after 400 cycles at a current rate of 1 A g-1 and an operating temperature of 125 °C. Furthermore, a full-cell employing a TiS2 cathode and a GaSb/LiBH4/C composite anode delivered a capacity of 226 mAh g-1 (based on the mass of GaSb) after 1,000 cycles at a current rate of 0.5 A g-1. Long et al. reported the use of liquid Ga metal to induce capacitive behavior and improve the rate capabilities of ASSLIBs [Figure 15C][126]. Liquid Ga was electrochemically introduced from a GaSb anode, and the combination of capacitive behavior and enhanced solid-phase contact was found to promote fast kinetics. The GaSb/LiBH4/C anode demonstrated remarkable cyclability (691 mAh g-1 after 800 cycles at a current rate of 660 mA g-1). Kumari et al. prepared an Sb/LiBH4/acetylene black (AB) composite that delivered stable cyclability with a reversible capacity of 621 mAh g-1 after 50 cycles at a current rate of 150 mA g-1[127]. The buffering effect of LiBH4 and AB on the Sb anode contributed to cycling stability. Sharma et al. reported Sb-based chalcogenides, specifically Sb2X3 (X = S, Se, or Te), as ASSLIB anodes that use LiBH4 as the solid electrolyte[128]. The prepared Sb2X3/LiBH4/AB was evaluated at an operating temperature of 120 °C. While both Sb2Se3 and Sb2Te3 exhibited poor cyclability owing to excessive volume changes, Sb2S3 showed a capacity retention of 80% after 100 cycles. However, all Sb-based chalcogenide anodes exhibited poor ICEs of approximately 50%. Sharma et al. also identified a compatible solid electrolyte by changing the solid electrolyte mixed with the anode composite and controlling the operating temperature [Figure 15D][129]. Electrochemical performance was evaluated using LiBH4 as the solid electrolyte at operating temperatures ranging from 40 to 120 °C. The Sb2S3/80Li2S-20P2S5 (LPS)/AB composite exhibited a high capacity of 1,373 mAh g-1 and high cycling stability (~60% after 100 cycles) at an operating temperature of 120 °C, which is superior to the performance achieved using LPS as the solid electrolyte. Sb-based anodes have been successfully adopted and exhibit high electrochemical performance. To achieve better electrochemical performance of Sb-based anodes for ASSLIBs, further studies focusing on the optimal structure of the Sb-based anode and its compatibility with various solid electrolytes are required. Recent advances in Sb-based anodes for ASSLIBs are summarized in Table 5.

Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries

Figure 15. (A) Schematic illustration of an Sb/LLZO/C composite ASSLIB anode[124]. (B) Schematic illustration, TEM images, and cyclability of a GaSb/LiBH4/C composite ASSLIB anode[125]. (C) Schematic illustration and cyclabilities of Sb/LiBH4/C and GaSb/LiBH4/C ASSLIB anodes[126]. (D) Schematic illustration and cyclability of an Sb2S3/LPS/AB composite ASSLIB anode[127]. This figure is reproduced with permission from Afyon et al.[124], Mo et al.[125], Long et al.[126], and Kumari et al.[127].

Table 5

Electrochemical performance of Sb-based ASSLIB anodes

MaterialSolid electrolyteICE (%)Cyclability after the Xth cycle
(mAh g-1)
Rate capabilityRef.
(A g-1)
(mAh g-1)
Sb/LLZO/CLi6.25Al0.25La3Zr2O1298.0230 (X = 240)0.5240[124]
GaSb/LiBH4/CLiBH497.2400 (X = 400)6.0349[125]
GaSb/LiBH4/CLiBH493.2691 (X = 800)3.3380[126]
Sb/LiBH4/ABLiBH495.0621 (X = 50)--[127]
Sb2S3/LiBH4/ABLiBH465.0448 (X = 100)--[128]
Sb2Se3/LiBH4/ABLiBH468.0267 (X = 100)--[128]
Sb2Te3/LiBH4/ABLiBH452.0236 (X = 100)--[128]
Sb2S3/LPS/ABLiBH459.0774 (X = 100)--[129]


Sb is a promising alternative high-performance anode material for use in LIBs, SIBs, PIBs, and ASSLIBs owing to its high theoretical gravimetric and volumetric capacities. However, the significant volume changes experienced by the Sb anode during cycling result in poor cyclability. To address the significant volume-change issue, various strategies based on a complete understanding of the electrochemical reaction mechanisms of Sb anodes have been explored. These strategies include SEI layer control, structural control, and composite/alloy formation.

SEI layer control: Sb-based anodes form unstable SEI layers, which are repeatedly formed and destroyed due to excessive volume changes during cycling. Controlling the composition and structure of the SEI layer is crucial for achieving high cycling stability and reversible capacities. Various electrolyte additives provide robust and chemically stable SEI layers. These SEI layer control strategies prevent continuous electrolyte consumption, achieve superior cycling stability, and inhibit side reactions that result in high ICEs and reversible capacities.

Structural control: Structural control is important for addressing the volume-change issues associated with Sb-based anodes because bulk Sb particles suffer from pulverization owing to large volumetric expansions/contractions. Various multidimensional nanostructures (0D, 1D, 2D, and 3D) provide large surface areas and improve mechanical stability, thereby effectively suppressing and accommodating large volume changes in Sb anodes during cycling. Therefore, structural control of Sb improves cyclability and rate capabilities compared to bulk Sb.

Composite/alloy formation: Sb-based composites and alloys show significant advantages over pristine Sb as anodes for AIBs and ASSLIBs. Incorporating carbon sources into Sb-based composites effectively suppresses the volume change that occurs during repeated cycling, thereby enhancing structural stability. Additionally, the conductive nature of carbon facilitates electron/ion diffusion and contributes to superior cycling stability and high rate capability. In contrast, pristine Sb has low electronic conductivity, leading to rapid capacity degradation and sluggish rate capability. Furthermore, Sb-based alloy materials have been reported to exhibit smaller volume changes during charging and discharging owing to unique reaction mechanisms that involve insertion or conversion reactions.

The abovementioned strategies have led to significant advances in the electrochemical performance of Sb-based anodes for use in LIBs, SIBs, PIBs, and ASSLIBs. The ongoing exploration of innovative strategies is expected to improve the electrochemical performance of Sb-based anodes in terms of cycling stability, rate capability, and reversible capacity. We trust that this review provides a comprehensive insight and guides future research into Sb-based anodes for next-generation battery systems.


Authors’ contributions

Writing original draft, content curation, investigation: Yoon JM, Kim DG

Content curation, investigation, writing of review: Kim DH, Lee YH

Conceptualization, validation, visualization, funding acquisition, project administration, supervision, and writing of review and editing: Park CM

Availability of data and materials

Not applicable.

Financial support and sponsorship

This research was supported by Kumoh National Institute of Technology (2022~2024).

Conflicts of interest

Park CM is an Editorial Board member of the journal Energy Materials, while the other authors have declared that they have no conflicts of interest.

Ethical approval and consent to participate

Not applicable.

Consent for publication

Not applicable.


© The Author(s) 2024.


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Yoon JM, Kim DG, Kim DH, Lee YH, Park CM. Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries. Energy Mater 2024;4:400063.

AMA Style

Yoon JM, Kim DG, Kim DH, Lee YH, Park CM. Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries. Energy Materials. 2024; 4(6): 400063.

Chicago/Turabian Style

Jeong-Myeong Yoon, Deok-Gyu Kim, Do-Hyeon Kim, Young-Han Lee, Cheol-Min Park. 2024. "Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries" Energy Materials. 4, no.6: 400063.

ACS Style

Yoon, J.M.; Kim D.G.; Kim D.H.; Lee Y.H.; Park C.M. Recent advances in Sb-based anodes for Li/Na/K-ion batteries and all-solid-state Li-ion batteries. Energy Mater. 2024, 4, 400063.

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