快速液相法制备板状单晶LiCoO_2正极材料  

Preparation of plate-type LiCoO_2 single crystal cathode materials by facile solution synthesis

作　　者：刘建男 刘颖佳[1] 任文锋[1] 陈剑[1] LIU Jian-nan;LIU Ying-jia;REN Wen-feng;CHEN Jian(Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian Liaoning 116023,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院大学,北京100049

出　　处：《电源技术》2018年第10期1427-1429,1558,共4页Chinese Journal of Power Sources

摘　　要：以乙酸钴和碳酸锂为钴源和锂源,乙二醇和聚乙烯吡咯烷酮(PVP)分别为反应溶剂和表面活性剂,采用液相法制备钴酸锂材料。利用XRD、SEM、TEM等表征了材料的结构和形貌。结果显示,所制得的材料是一种具有单晶结构的板状材料,粒径小于1 mm。与商品钴酸锂材料相比,所制得的材料的晶粒尺寸均一,形貌规整,且在2.8～4.3 V电压范围内,表现出更优的倍率性能。The crystalline LiCoO2 powders were fabricated by a facile solution synthesis using Co(CH3COO)2·H2O and LiNO3as the lithium and cobalt sources,glycol as the solvents,and polyvinylpyrrolidone(PVP)as the surfactant.The structure and morphology of the final products were characterized by XRD,SEM and TEM.It is found that the as-prepared LiCoO2 exhibits plate morphology with single crystal structure.The particle size is less than 1μm.Compared with the commercial LiCoO2,the plate-type LiCoO2 exhibits more uniform grain size and regular morphology,which delivers a higher discharge capacity and more stable cycling performance when charge and discharge in the potential range of 2.8 to 4.3 V.

关 键 词：锂离子电池 正极材料 LICOO2 单晶 

分 类 号：TM912[电气工程—电力电子与电力传动]