Li_2SO_4-Ce_(0.9)Ca_(0.1)O_(1.9)复合电解质中温区电学性能与应用

The Electricity Properties and the Application of Composite Intermediate Electrolyte Li_2SO_4-Ce_(0.9) Ca_(0.1)O_(1.9)

以 Li2 SO4 和 Ce0 .9Ca0 .1O1.9为原料 ,混合制成复合电解质 .实验表明 ,Li2 SO4 -Ce0 .9Ca0 .1O1.9复合电解质在中温区 (50 0～ 650℃ )具有较高的导电率 ,以此材料制成的燃料电池的开路电压可达 1 .0 V左右 ,明显高于以 Ce0 .9Ca0 .1O1.9为电解质的燃料电池的开路电压 ,在 550℃左右具有 1 0 m W/cm2 以上的最大输出功率密度 ,但在更高的温度下性能有所下降 ,且电极性能尚待改进 .

A composite electrolyte was synthesized by using Li 2SO 4 and Ce 0.9 Ca 0.1 O 1.9 as raw material. It shows a high ionic conductivity at intermediate temperatures (500~650 ℃). The fuel cell with this material as electrolyte has an open circuit voltage of about 1.0 V that is higher than that of the fuel cell with Ce 0.9 Ca 0.1 O 1.9 as electrolyte. The maximum output power density of this cell is 10 mW/cm 2 at 550 ℃, but the properties will decrease at a higher temperature and the property of the electrode should be improved.