fig18

Figure 18. (A) Schematic of the designed integrative photothermal evaporator/thermogalvanic cell. (B) Temperature profiles of the upper and bottom surfaces under chopped one sun illumination and corresponding V_oc and I_sc (inset: temperature difference between two surfaces). (C) Discharge polarization curves and related power densities of the thermogalvanic cells using Cu foil or CuO/Cu foil as electrodes. (D) V_oc of this cell with cycle rotation. (E) Schematic of the structure and working principle of the smart thermogalvanic hydrogel. (F) Temperature variation of the battery at different discharging rates with (red) and without (black) thermogalvanic hydrogel on the surface. (G) Schematic of the experiment setup. Inset shows the cross-sectional view. (A-D) Reprint with permission Ref.^[10]. Copyright 2020, Wiley-VCH. (E-G) Reprint with permission Ref.^[70]. Copyright 2020, American Chemical Society.