fig4

Figure 4. Electrochemical performance of H-TBA/ZHP/MoO₃ all-solid-state proton battery. (A) Device schematic; (B) GCD curves at different current densities; (C) Rate performance; (D and E) GCD profiles for full battery at various temperatures; (F) Comparison with reported systems; (G) Cycling GCD profiles at 1,000 mA·g^-1; (H-J) Cyclability and coulombic efficiency of the battery at 1,000 mA·g^-1 at room temperature (H), at 1,000 mA·g^-1 at 40 °C (I), and at 100 mA·g^-1 at -30 °C (J). H-TBA: Pre-protonated Turnbull’s blue analogue; ZHP: zirconium hydrogen phosphate; GCD: galvanostatic charge/discharge; PBA: Prussian blue analogue; MSA: methanesulfonic acid; ZIF: zeolitic imidazolate framework; MeSA: methylsulfonic acid; PBI: polybenzimidazole; COF: covalent organic framework.