正极材料Li_3V_2(PO_4)_3的合成及其电化学性能  

Synthesis and Electrochemical Properties of the Cathode Material Li_3V_2(PO_4)_3

作　　者：尹周澜[1] 钟胜奎[1] 王志兴[1] 陈启元[1] 

机构地区：[1]中南大学,湖南长沙410083

出　　处：《稀有金属材料与工程》2007年第9期1639-1643,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50302016)资助项目

摘　　要：通过碳热还原法合成了锂离子电池正极材料Li3V2(PO4)3,考察了不同合成温度、时间对产物晶形结构、形貌和电化学性能的影响。结果表明,当合成温度、时间分别为800℃,20h时,所合成的样品属于单斜晶系,且粒度大小分布比较均匀,该材料以0.2C充放电,其首次放电容量为120mAh·g-1,循环30次后其比容量达108mAh·g-1。The cathode material Li3V2（PO4）3 was prepared by carbothermal reduction reaction method. The effects of reaction temperature and time on the crystal structure, morphology and electrochemical properties of products were investigated. The results show that the sample synthesized at 800 ℃ for 20 h has a single monoclinic structure with homogenous distribution of particles, resulting in a initial discharge capacity of 120 mAh·g^-1 at the rate of 0.2 C, kept to be 108 mAh·g^-1 after 30 cycles.

关 键 词：锂离子电池 正极材料 LI3V2(PO4)3 碳热还原法 

分 类 号：TM910.4[电气工程—电力电子与电力传动]