摘要
通过改变处理溶液中铜的含量和ｐＨ值等包覆条件，考查了ＡＢ５型贮氢合金酸性包覆铜处理方法和相应金属氢化物电极的放电性能。研究表明该方法具有经济易操作的特点，处理溶液的ｐＨ值对铜包覆速度和电极初期放电性能有很大影响。通过循环伏安实验和紫外可见光谱技术研究了包覆铜层的稳定性，实验结果表明电极表面包覆层能通过形成氧化物，以ＣｕＯ２－２的形式溶解到电解液中，并且溶解在电解液中的铜离子对氧化镍正极的电极性能产生不良影响。
The coating conditions of copper on AB 5 type hydrogen storage alloy and the electrochemical performance of copper coated metal hydride electrodes have been investigated through changing the concentration of copper ions and pH value of the treatment solution.The results showed that the copper coating treatment improved the initial electrochemical performance of metal hydride electrodes,and the pH value of treatment solution was important to increase the coating rate of copper and improve the initial discharging behavior of electrodes.Furthermore,the stability of copper coated layer on metal hydride electrode also have been studied with the help of cyclic voltammetry and UV visible spectrophotometer.It was demonstrated that the copper coated layer was oxidized and dissolved into the electrolyte in the form of cupric oxide,and the redox behavior of nickel hydroxide/oxyhydroxide electrode is affected by the copper ions dissolved in the electrolyte.
出处
《电源技术》
CAS
CSCD
北大核心
1998年第5期188-191,共4页
Chinese Journal of Power Sources
基金
国家"863"计划
国家自然科学基金
关键词
铜包覆
金属氢化物电极
电化学性能
碱性蓄电池
Ni MH battery,copper coating,electrochemical performance,electrochemical stability
