电解质支持型固体氧化物燃料电池的制备及其工作稳定性

摘要

利用固相反应法制备固体氧化物燃料电池(SOFC)的复合阳极材料 NiO-ScSZ 和复合阴极材料(La0.8 Sr0.2)0.98 MnO3(LSM)，并对组装的电解质支持型单电池 NiO-ScSZ-LSM进行I-V性能测试，其输出电压每0.2 A为0.9 V.在外加恒定电流密度(0.2 A/cm2)的条件下，利用电化学测试仪测试该电池的总电压为每1000 h衰减0.02 V.电流遮断法解析表明，该单电池电压衰减主要为阴极过电压所致.%Cermet anode material NiO-ScSZ and cathode material (La0.8 Sr0.2 )0.98 MnO3 (LSM)were prepared via solid state reaction method. The performance electrolyte-supported single cell of NiO-ScSZ-LSM exibited an output voltage of 0.9 V at 0.2 A described by current-voltage characterized curve.The investigation on the endurance of the single cell indicates that the whole voltage decay is 0.02 V per 1 000 h (at a current density of 0.2 A/cm2 )by electro-chemical measurement.The main resource of it comes from cathodic over-voltage by galvanic current interruption method.