摘要
采用微波法制备锂离子电池正极材料LiFePO4,通过X射线衍射(XRD)、扫描电镜(SEM)、循环伏安和恒电流充放电测试等方法对材料的结构、表观形貌及电化学性能进行表征,考察了葡萄糖、导电碳黑等不同碳源对目标材料性能的影响。结果表明,采用微波法能快速简便地制备出均相LiFePO4;于0.1 C倍率下,以葡萄糖作为碳源的正极材料首次放电比容量可达131.1 mA.h/g,充放电30次循环后,容量损失率为2.1%;以导电炭黑作为碳源的正极材料首次放电比容量为118.3 mA.h/g,充放电30次循环后,容量损失率为5.2%。
The anode material of olivine LiFePO4 is prepared by microwave heating. The structure,morphology of particles and electrochemical performance of the samples were investigated by X-ray diffraction, scanning electron microscopy,cyclic voltammetry and constant current charge-discharge test. The effect of different carbon sources, e. g. dextrose and conductive carbon black is studied. The results show that the single phase LiFePO4 powder can prepared by this method at a low discharging rate,the initial specific discharge capacity of the anode material with dextrose as carbon sources is 131. 1 mA · h/g the circulating performance is good with only 2.1 % capacity fading after 30 discharge-charge circles. The specific discharging capacity of the anode material with conductive carbon black as carbon sources is 118. 3 mA · h/g the circulate performance is good with only 5.2% capacity fading after 30 discharge-charge circles.
出处
《稀有金属与硬质合金》
CAS
CSCD
2007年第1期10-13,共4页
Rare Metals and Cemented Carbides
基金
辽宁省科技厅攻关项目(2003224005)
关键词
锂离子电池
正极材料
LIFEPO4
微波法
碳源
lithium-ion battery ； anode material； LiFePO4 ； microwave heating ； carbon source
作者简介
冯宏波（1982-），男，硕士研究生，研究方向为锂离子电池正极材料的制备。
