固体氧化物燃料电池电解质GDC掺杂Li2CO3,SrCO3材料的结构和导电性能研究

Structure and Electrical Conductivity of GDC Doped with Li2CO3, SrCO3 Electrolyte in Solid Oxide Fuel Cell

通过向电解质(GDC)中掺杂不同质量分数(10%、20%、30%)的碳酸盐(Li 2CO 353mol%、SrCO 347mol%),得到复合电解质.通过电导率测试、扫描电镜(SEM)测试对此复合电解质进行电化学性能表征.将此复合电解质与NiO复合得到阳极粉体,将此复合电解质和Li处理过的NiO复合,得到阴极粉体.将制备的阳极、阴极、电解质用干压法压制,得到阳极支撑的单电池片.对单电池的电化学性能进行表征.实验结果表明,含碳酸盐质量分数为20%的GDC作为电解质制备的单电池功率密度最高,在650℃温度下,为100 mW·cm^-2.

Composite electrolytes were prepared by doping carbonates(Li 2CO 353 mol%and SrCO 347mol%)with different mass fractions(10%,20%,30%)into electrolyte(GDC).The electrochemical properties of the composite electrolyte were characterized by conductivity test and scanning electron microscopy(SEM).Anode powder was prepared by doping composite electrolytes into NiO,and the cathode powder was obtained by compounding the composite electrolytes with Li-treated NiO.The anode,cathode and electrolyte prepared above were pressed by dry pressure method to obtain a single cell supported by the anode.The performance of the cell was characterized later.The results of electrochemical performance of single cell show that GDC with 20%carbonate has the highest power density,which is 100 mW·cm^-2 at 650℃.