摘要
通过固相合成法合成锂离子电池五极材料ＬｉＮｉｘＣｏ１－ｘＯ２（０≤ｘ≤１），研究了反应温度、时间和配比等因素对合成的影响。实验证明，随合成时间的增长，产物的衍射峰强度增大，结构更完整，电化学性能更好。在６００℃预烧一段时间的条件下，７５０℃恒温合成的产物要比６５０℃和 ８５０℃保温合成的产物层状结构更明显，首次充电容量更高。按镍钴的不同配比，均能合成出结构良好的ＬｉＮｉｘＣｏ１－ｘＯ２，而配比为ｎ（Ｌｉ）：ｎ（Ｎｉ）：ｎ（Ｃｏ）＝１．１５：０．３：０．７（摩尔比）时合成出的产物初始容量较高，达到１５６．１４６ｍＡｈ／ｇ。
The cathode materials LiNixCo1-xo2(0≤x≤l ) for lithium ion battery was prepared in solid phase. The effects of synthesis temperature, heat treatment time and ratio of raw materials on products were discussed. The results showed that the products preheated at 600℃ and then sintered at constant temperature 750℃ were better than those sintered at constant temperature 650℃ or 850℃, their layer structures were more obvious and their initial capacity was higher. The longer the heat-treatment time, the stronger the XRD peaks and the better their structures and electrochemical performance. And the product initial capacity was perfect when n(Li): n(Ni):n(Co) = 1.15:0.3:0.7, the initial capacity of the product was as high as 156. 146mAh/g.
出处
《电池》
CAS
CSCD
北大核心
2001年第3期116-118,共3页
Battery Bimonthly
基金
国家自然科学基金资助项目(50062001)
