2022-11-16
钴酸(suan)锂电池(chi)的钴酸(suan)锂化(hua)学式为(wei)LiCoO2，是一(yi)种无机(ji)化(hua)合物，一(yi)般用(yong)作锂离子电池(chi)的正(zheng)极材(cai)料。LiCoO2基本采用(yong)了目前商用(yong)锂离子电池(chi)中层状结(jie)构(gou)的锂离子二(er)次(ci)电池(chi)正(zheng)极材(cai)料 (钴酸(suan)锂) 的液(ye)(ye)相合成工艺。它以聚(ju)乙烯醇 (PVA) 或(huo)聚(ju)乙二(er)醇 (PEG) 水(shui)溶液(ye)(ye)为(wei)溶剂，将锂盐和钻盐分(fen)别溶于PVA或(huo)PEG水(shui)溶液(ye)(ye)中，混合溶液(ye)(ye)加(jia)(jia)热(re)浓(nong)缩形成凝(ning)胶(jiao)，并对生成的凝(ning)胶(jiao)进行加(jia)(jia)热(re)分(fen)解(jie)，然后高(gao)温煅烧(shao)，将烧(shao)结(jie)后的粉(fen)末进行研磨、筛分(fen)，得到钴酸(suan)锂粉(fen)。
LiCoO2广(guang)泛用(yong)于大功率锂离子(zi)电池。层(ceng)状(zhuang)LiCoO2锂离子(zi)在CoO2原(yuan)子(zi)致(zhi)密层(ceng)层(ceng)之(zhi)间二(er)维运动，具(ju)有(you)工作(zuo)电压(ya)高、充放电电压(ya)稳定、比能量高、循环性能好等优(you)点(dian)。
钴酸锂电池充放电过程中(zhong)发生的(de)反应：
充电过程中的反应：
正极：LiCoO2=Li1-xCo02+xLi++xe-
负极：6C+xLi++xe-=LixC6
放电过程中的反应：
正极：Li1-xCoO2+xLi++xe-=LiCoO2
负极(ji)：LixC6=6C+xLi++xe-
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