Protonic batteries based on chemically synthesized MnO2

Abstract

Synthesis temperature, during air-oxidation of manganese hydroxide, of γ-MnO 2 influences performance of the protonic solid-state battery. X-ray powder diffraction analyses reveal a high degree of De Wolff disorder in samples synthesized at 40 and 60°C, resulting in poor battery performance. The discharge profile of cell with proton-conducting solid electrolyte and composite zinc as anode, recorded at a constant load condition, indicates proton intercalation. MnO 2 synthesized at 80°C exhibits improved battery performance.