Thermorechargeable battery composed of mixed electrodes

Abstract

A thermorechargeable battery (TB) can be charged by heating or cooling, and hence, converts thermal energy into electric energy. The manufacture of TB, however, requires adjustment of the cathode and anode potentials by pre-oxidation. Here, we demonstrated that application of mixed electrodes composed of reduced and oxidized compounds makes the adjustment process unnecessary. The TB made of mixed electrodes exhibited excellent thermal cycle stability of the thermal voltage $V_{\mathrm{TB}}$ and discharge capacity $Q_{\mathrm{TB}}$ between 20 °C and 50 °C.