Polymer electrolyte based on chemically stable and highly conductive alkali-doped polyoxadiazole for direct borohydride fuel cell

摘要

Solid electrolyte membranes based on alkali-doped poly (4, 4'-diphenylether-1, 3, 4-oxadiazole) were first introduced into direct borohydride fuel cell (DBFC). The membranes, with outstanding thermal and chemical stability, showed comparable ion conductivity to Nafion? 115 in alkaline solution and peak power density of 146 mW cm~(-2) at the temperature of 40 °C. Furthermore, no weight loss was observed after soaking the membrane in 3 M NaOH solution for 10 days, indicating its excellent chemical stability in alkaline conditions. These results revealed the great potential of alkali-doped polymer for DBFC application.