LiNiO_2的制备及其在充放电过程中的结构变化  

Synthesis of LiNiO_2 cathode material and its structure change during charge-discharge cycling

作　　者：李凯慧[1] 张少文[2] 

机构地区：[1]华北水利水电学院环境工程系,河南郑州450008 [2]洛阳大学环境与化学工程系,河南洛阳471023

出　　处：《郑州轻工业学院学报（自然科学版）》2006年第2期26-28,96,共4页Journal of Zhengzhou University of Light Industry:Natural Science

摘　　要：采用流变相合成新方法,用LiOH.H2O和Ni(OH)2合成了锂离子电池正极材料LiNiO2.通过SEM和XRD等手段研究了产物的结构及其在充放电过程中的结构变化,采用Neware电池测试系统对其电化学性能进行了测试.结果表明,在氧气存在的气氛中合成的材料具有纳米团聚结构,在充放电过程中始终保持三方结构.常温下材料的初始充、放电容量分别达250 mAh/g,198 mAh/g(3.0 V^4.35 V,25 mA/g).LiNiO2 cathode material was synthesized using LiOH·H2O and Ni（OH）2 as starting material by a newly developed rheological phase reaction method. It was characterized by SEM, XRD and electrochemical measurements. Netware battery testing system is applied to check its electrochemistry capacity. The material can only be formed in the atmosphere where oxygen exists. Its structure maintains hexagonal all the time during charge-discharge cyclying. LiNiO2 delivers an initial discharge capacity of 250 mAh/g and 198 mAh/g （3.0V～4.35 V, 25 mA/g） respectively, and shows good capacity retention.

关 键 词：LINIO2 正极材料 流变相反应法 纳米团聚材料 锂离子二次电池 

分 类 号：TM912.2[电气工程—电力电子与电力传动] TM912.206