贮氢电极合金电化学容量的评价方法  

EVALUATION AND ANALYSIS OF THE ELECTROCHEMICAL CAPACITY OF METAL HYDRIDE ELECTRODE USING HYDROGEN STORAGE ALLOYS IN ALKALINE AQUEOUS SOLUTION

作　　者：江建军[1] 雷永泉[2] 孙大林[2] 吴京[2] 王启东[2] 

机构地区：[1]华中理工大学,武汉430074 [2]浙江大学,杭州310027

出　　处：《金属学报》1997年第7期729-736,共8页Acta Metallurgica Sinica

基　　金：国家863高技术资助!863-715-08-01-02

摘　　要：设计了三种电化学测试系统并进行金属氢化物电极电化学性能对比分析．结果表明，开口式三电极系统测出的放电容量明显高于夹片式和模拟电池系统所测出的放电容量，夹片式电极系统测试的结果和模拟电池系统测试的结果比较一致．作者认为氢化物电极的电化学容量不仅与贮氢合金的本征因素有关，且与电极制备工艺和电极的工作环境密切相关．To determinate an appropriate method measuring the performance of a metal hydride electrode, three different electrochemical apparatus were designed. The results showed that electrochemical capacity of hydride measured by a conventional three-electrode open cell was higher than that determined in a sandwiched and in a sealed Ni/MH test cell.The electrochemical capacity of a hydride electrode measured in a sandwiched Ni/MH cell was very close to that measured in a sealed test cell. In order to optimize the metal hydride electrode alloy and elevalute the discharge capacity of an alloy, the factors affecting the discharge process of an actual hydride electrode were examined theoretically and experimentally. It can be concluded that the electrochemical capacity of a hydride electrode depends not only on the intrinsic properties of a hydrogen storage alloy, but also on the electrode preparation method and its working environment.

关 键 词：金属氢化物 电极 贮氢合金 电化学 放电容量 

分 类 号：TG139.7[一般工业技术—材料科学与工程] O646.54[金属学及工艺—合金]