采用化学镀的方法在球形Ni(OH)2表面包覆了金属钴,通过比较恒电流充放电实验和循环伏安实验结果,发现球形Ni(OH)2表面镀钴,可以明显提高电极的放电容量、活性物质利用率,增加电极反应的可逆性,用XRD法比较研究了包覆钴和掺钴球形Ni(OH)2正极在充放电过程中相的生成和变化,发现掺钴的球形Ni(OH)2可抑制γ-NiOOH的生成,这有利于提高Ni(OH)2电极的循环寿命.此外,本文还对镀钴层改进Ni(OH)2电极性能的机理进行了讨论.
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