Abstract
Energy band alignment in ZnO-Sm2O3 was proposed to design promising electrolyte materials for low temperature ceramic fuel cells. The arrangement of energy bands leads to local electric field at the interface, avoiding short-circuit problems and accelerating ion conduction in ZnO-Sm2O3 electrolyte low temperature ceramic fuel cells. The optimized composite electrolyte 7ZnO-3Sm2O3 fuel cell devices an appreciable maximum power density of 790 mW cm−2 and stable power density of 125 mW cm−2 for 40 h at 500 °C.
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