用化学氧化法合成了3.40价的钴化合物,X射线衍射分析表明,该化合物的晶体结构与γ-NiOOH相同,属于准六方层状结构.粉末电阻测试表明,这种高价钴化合物的电阻仅为二价Co(OH)3的1/3,添加到氢氧化镍电极中,可以与氢氧化镍颗粒形成一整体的导电网络,不仅能有效地改善充放电过程中电极反应的可逆性和循环性能,而且大大提高正极活性物质利用率和电极活化速度,在0.2C倍率充放电条件下,活性物质利用率经一次循环就能达到100.6%.
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