碱金属热电转换器的电极制备及性能评价  

Preparation and performance evaluation of electrode film for AMTEC

作　　者：马俊平 何虎[1] 李思杰 张浩 罗志福[1] MA Jun-ping;HE Hu;LI Si-jie;ZHANG Hao;LUO Zhi-fu(China Institution of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《电源技术》2018年第10期1550-1552,共3页Chinese Journal of Power Sources

摘　　要：电极是碱金属热电转换器中的重要组成部分,其性能与转换器性能直接相关。在b''-氧化铝管表面沉积具有一定孔隙率、均匀的铑-钨合金薄膜作为电极,并设计高温低压钠蒸汽测试装置对电极性能进行初步评价。结果显示制备的电极薄膜孔隙率约30%;在450℃钠蒸汽条件下,电极的交换电流密度为36 A·K^(1/2)·m^(-2)·Pa^(-1),β''-氧化铝管的钠离子电导率为0.133 6 S/cm。The electrode is an important part in alkali metal thermal to electric converter(AMTEC).The performance of a AMTEC was strongly affected by the electrode.A RhW thin film was deposited onβ"-alumina solid electrolyte(BASE)tubes,and it was uniform and porosity.A test cell was set up in order to investigate the interfacial electrical property between the electrolyte and RhW electrode.The results show that the porosity is 30%.And in a 450℃sodium vapor condition,the temperature independent exchange current of the electrode is up to 36A·K^1/2·m^-2·Pa^-1,the sodium ion conductivity of BASE tube is 0.133 6 S/cm.

关 键 词：电极 孔隙率 交换电流密度 

分 类 号：TM911[电气工程—电力电子与电力传动]