论文部分内容阅读
研究了贮氨合金两种表面化学处理方法对MH电极活化性能及Ni／MH电池IC充放电性能的影响：第一种处理方法是贮氢合金在6th。l·L－’KOH溶液中80T处理sh，第二种处理方法是在含有0．04mol·L－‘KBH4的6mol·L’‘KOH溶液中80t处理sh．通过MH电极的放电容量、充放电过程中电极极化和电化学阻抗谱测试评价了上述化学处理对电极活化性能的影响．电子探针表面分析表明化学处理后贮氢合金表面由于铝元素的优先溶解形成一层具有较高电催化活性的富镍表面层，它是改善电极活化性能的主要原因·以处理的贮氨合金为负极材料的Ni／MH电池具有较高IC充放电循环寿命和1．ZV以上放电容量．
The effects of two surface chemical treatments of storage alloy on the activation performance of MH electrode and charge / discharge performance of Ni / MH battery were investigated. The first treatment method was hydrogen storage alloy at 6th. l · L-’KOH solution 80T treatment sh, the second treatment method is containing 0.04mol · L-’KBH4 6mol · L "KOH solution 80t treatment sh. The influence of the above chemical treatment on the activation performance of the electrode was evaluated by the discharge capacity of the MH electrode, the electrode polarization during electrochemical discharge and the electrochemical impedance spectroscopy. Electron probe surface analysis showed that the chemical treatment of hydrogen storage alloy surface due to the preferential dissolution of aluminum to form a layer of nickel-rich surface layer with higher electrocatalytic activity, which is to improve the electrode activation performance of the main reason to deal with the storage alloy Ni / MH battery with negative electrode material has higher IC charge-discharge cycle life and 1. ZV above discharge capacity.