固体聚合物电解质水电解池电极的优化研究  

Optimization of membrane electrodes for SPE water electrolysis

作　　者：马霄平[1] 宋世栋[2] 谭忠印[1] 张华民[2] 衣宝廉[2] 

机构地区：[1]辽宁师范大学化学与化工学院,辽宁大连116029 [2]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《电源技术》2006年第8期621-624,640,共5页Chinese Journal of Power Sources

摘　　要：目前固体聚合物电解质(SPE)水电解池的膜电极催化层中各组分的配比普遍以全氟磺酸树脂(Nafion)与催化剂的质量百分比来表征,但是由于催化剂的堆密度不同,对于不同的催化剂如果沿用相同的质量配比会造成催化层中Nafion含量的失调,影响电极的质子与电子传导能力。研究了以Nafion与催化剂的体积比来表征电极催化层的组分配比和结构,并利用交流阻抗、循环伏安、极化曲线等电化学测试方法,对其体积比进行了最优化研究。结果表明,Nafion与阳极催化剂(Pt黑与IrO2混合物)的体积比1∶10时水电解的性能最佳。Nafion content in the catalyst layer is generally expressed as weight ratio of Nafion, if a fixed weight ratio of Nafion is used without consideration of the bulk density of catalyst, it may cause poorly proton or electron conducUvity. The present study indicates that the optimum composition of catalyst layer should change the bulk ratio of Nafion to catalyst. Investigation was made by using electrochemical impedance spectroscopy, cyclic voltammetry and polarization curves. The results showed that the best performance was obtainted when the bulk ratio of Nafion to catalyst was 1 ： 10.

关 键 词：固体聚合物电解质水电解池 催化层 Nation树脂 电化学测试 

分 类 号：TM911.4[电气工程—电力电子与电力传动]