V_2O_5复合沉淀的快速制备及其电化学性能  

Synthesis and properties of V_2O_5 composite precipitation for Li-ion battery

作　　者：李海霞[1] 袁华堂[1] 曹建胜[1] 焦丽芳[1] 赵明[1] 王永梅[1] 

机构地区：[1]南开大学新能源材料化学研究所,天津300071

出　　处：《电源技术》2005年第12期808-809,822,共3页Chinese Journal of Power Sources

基　　金：国家重大基础研究项目(2002CB211800)

摘　　要：通过NaVO3酸化沉淀法快速制备出V2O5红色复合沉淀物。根据热重-差热(TG-DTA)和电感耦合等离子体光谱(ICP)的分析可知产物组成为Na0.26V2O5(SO4)0.13·0.85H2O。电化学性能测试表明,在1.5～4.0V范围内,0.5mA·cm-2(C/2.5)放电率下首次放电比容量达242.8mAh·g-1,循环40周期后放电比容量在145.0～176.1mAh·g-1之间。V2O5 red solid was easily and quickly prepared by precipitation from acidified NaVO3 solution. A composition of Na0.26V2O5（SO4）0.13·0.85H2O was derived from TG-DTA and ICP. The electrochemical properties showed that the initial specific discharge capacity of the material is 242.8 mAh·g^-1 and the 40th specific discharge capacity is 145.0-176.1 mAh·g^-1 at 0.5 mA·cm^-2 （C/2.5）and the voltage range of 1.5-4.0 V.

关 键 词：锂离子蓄电池 正极材料 V2O5 

分 类 号：TM912.9[电气工程—电力电子与电力传动]