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研究了钴元素分别以Co ,CoO ,Co +CoO三种形式作为添加剂并分别以与Ni(OH) 2 用机械混合的方式添加到电极活性物质中时对镍电极性能的影响 ,用循环伏安法和电化学交流阻抗法对实验结果进行分析 .结果表明 :对于机械混合的添加方式 ,Co ,CoO和Co +CoO三种形式的钴添加剂均可在一定程度上改善镍电极的性能 .其中 ,当钴以CoO的形式添加时镍电极的性能最好 .这是因为三种形式的添加剂均在一定程度上改善了活性物质Ni(OH) 2 的结构、增强了电极中质子的传输能力 ,从而提高了镍电极反应的可逆性 ,强化了镍电极的析氧极化 ,并提高了镍电极的充电效率 ,其中CoO的作用效果最明显 .
The effects of Co, CoO, Co + CoO as additives and the addition of Ni (OH) 2 to the electrode active material on the performance of nickel electrode were studied. The effects of cyclic voltammetry Method and electrochemical impedance spectroscopy were used to analyze the experimental results.The results show that the cobalt additive of Co, CoO and Co + CoO can improve the performance of nickel electrode to some extent, The nickel electrode performs best when cobalt is added in the form of CoO because all three types of additives improve the structure of the active material, Ni (OH) 2, and enhance the proton transport capacity in the electrode The reversibility of the nickel electrode reaction is enhanced, the oxygen evolution polarization of the nickel electrode is strengthened, and the charging efficiency of the nickel electrode is improved, and the effect of CoO is most obvious.