Fig. 1: Uncovering the overlooked thermogalvanic effect. | Nature Communications

Fig. 1: Uncovering the overlooked thermogalvanic effect.

From: Modulating thermo-diffusion/galvanic coupling via ion speciation engineering enables high-performance ionic thermoelectric cells

Fig. 1: Uncovering the overlooked thermogalvanic effect.The alternative text for this image may have been generated using AI.

The CuCl2 concentrations (x) range from 0.05 to 1.7 M. a Cyclic voltammetry (CV) curves. The inset picture is the enlarged view for the x = 0.05, 0.1, and 0.3 M. b Electrochemical Impedance Spectroscopy (EIS) curves. The inset picture is the enlarged view at high-frequency ranges. c Fitted values of the charge transfer resistance (Rct) and internal resistance (Rs) of PVA-x CuCl2 i-TE cells. The inset picture is the corresponding equivalent circuit. d Combination curves of saturated thermal voltage, short-circuit current density, and instantaneous maximum output power density. The applied temperature difference is 10 K. e Comparison of the normalized output power density and thermopower of the binary PVA-x CuCl2 i-TE cells with other reported ternary n-type thermogalvanic i-TE cells. f Comparison of the thermopower of PVA-0.1 M CuCl2 gel with other reported n-type state-of-the-art multicomponent i-TE gels.

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