应用喷雾热分解工艺合成了Li[NixC01-2x]O2(x=0.25,0.33,0.4,0.5)系列复合氧化物.采用SEM、XRD、ICP、扣式电池测试等方法对材料的结构和性能进行了表征.测试结果表明,喷雾热分解合成的材料Li-[NixC01-2xMnx]O2为球形形貌,而且化学成分得到很好的控制.Co含量增加后,晶胞参数a、c值减小,而I003/I104值增加,说明Co对层状结构起到了稳定作用,能抑制Li+与Ni2+之间的混排.2025型扣式电池的测试结果显示,高Co含量复合氧化物材料比低CO含量材料的首次充放电比容量稍高,同时倍率性能和循环性能也得到一定的改善.
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