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Fuel cells offer great promise for portable electricity generation, but their use is currently limited by their low durability, excessive operating temperatures, and expensive precious metal electrodes. It is therefore essential to develop fuel cell systems that can perform effectively using more robust electrolyte materials, at reasonable temperatures, with lower‐cost electrodes. Recently, proton...
The properties of proton conductors determine the operating temperature range of fuel cells. Typically, phosphoric acid (PA) proton conductors exhibit excellent proton conductivity owing to their high proton dissociation and self‐diffusion abilities. However, at low temperatures or high current densities, water‐induced PA loss causes rapid degradation of cell performance. Maintaining efficient and...