熔融碳酸盐燃料电池阴极材料的导电性  

Conductivity of cathode materials for molten carbonate fuel cell

作　　者：钱大伟[1] 李建玲[1] 张志超[2] 王新东[1] 

机构地区：[1]北京科技大学理化系,北京100083 [2]北京航空航天大学材料学院,北京100083

出　　处：《电源技术》2003年第3期270-273,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金资助(50074003);国家教育部优秀青年教师基金资助(无编号)

摘　　要：通过交流阻抗方法研究了熔融碳酸盐燃料电池阴极材料锂镍氧化物、锂钴氧化物和锂铁氧化物的导电性能。结果表明:锂镍氧化物电极的导电性最好,锂钴氧化物电极的导电性次之,锂铁氧化物电极的导电性最差;它们的导电性都随着温度的升高而按指数规律增加;在合成锂钴氧化物(或锂铁氧化物)的过程中,使Li2CO3轻微过量,可以提高锂钴氧化物(或锂铁氧化物)电极的导电性,而且在同一温度下,随着nLi∶nCo(或nLi∶nFe,摩尔比)值的增大,锂钴氧化物(或锂铁氧化物)电极的导电性显著增加。The conductivity of cathode materials for molten carbonate fuel cell (MCFC), such as lithium nickel oxide, lithium cobalt oxide and lithium ferrite oxide, was studied by AC impedance measurement. The results show that the lithium nickel oxide has the highest conductivity followed by the lithium cobalt oxide, and the lithium ferrite oxide has the lowest conductivity. Conductivity of the three materials is increased with the elevating of temperature. Conductivity of the lithium cobalt oxide (or the lithium ferrite oxide) can be improved by making Li2CO3 excessive slightly in the course of preparation. The con ductivity is also significantly increase d with the increasing of the value of nLi∶nFe(molar ratio).

关 键 词：熔融碳酸盐燃料电池 阴极材料 导电性 交流阻抗方法 锂镍氧化物 锂钴氧化物 锂铁氧化物 

分 类 号：TM911.4[电气工程—电力电子与电力传动]