fig6

Figure 6. (A) 59 pairs of p-type PVA/(Fe(CN)₆^3-/Fe(CN)₆^4-) (PPF) and n-type PVA/(Fe²⁺/Fe³⁺) (PCF). The polyelectrolytes were sandwiched between two flexible substrates made of polyimide (PI). (B) V_oc as a function of ΔT. (C) I-V curve and the corresponding power density of one pair of p-n series. (D) V_oc and I_sc of 59 pairs of p-n series by using body heat at an ambient temperature of 5 °C. (E) V_oc of capacitors charged by 59 pairs of p-n series in (D). (F) Schematic and photo of 50 pairs of p-type polyurethane-pNIPAm /(I^-/I₃^-) and n-type polyurethane/(I^-/I₃^-). The nanogel in (F) stands for pNIPAm. (G) V_oc as a function of ΔT. (F) I-V curve and the corresponding power density of 50 pairs of p-n series by using body heat at an ambient temperature of 5 °C. (I) V_oc of capacitors charged by 50 pairs of p-n series in (G). (J) Soft and stretchable TGC textiles made of p-type Pam/(Fe(CN)₆^3-/Fe(CN)₆^4-) and n-type Pam/( Fe²⁺/Fe³⁺). (K) V_oc and I_sc at a ΔT = 10 K with different p-n pair numbers. (L) V_oc of the TGC textile worn on the arm in various scenarios. (M) V_oc of a 220 nF capacitor charged by the TGC textile worn on the arm at an ambient temperature of 10 °C. Reprinted with permission Ref.^[39]. Copyright 2016, WILEY-VCH. (F-I) Reprinted with permission Ref.^[52]. Copyright 2019, Elsevier. (J-M) Reprinted with permission Ref.^[57]. Copyright 2021, WILEY-VCH.