LiFePO4/C正极材料的液相合成及电化学性能研究

功能材料, 2007, 38(8): 1316-1319.

LiFePO4/C正极材料的液相合成及电化学性能研究

徐亮 ^1, , 徐峙晖 ^2, , 赖琼钰 ^3, , 陈联梅 ^4, , 吉晓洋 ^5,

1.四川大学,化学学院,四川,成都,610064

2.四川大学,化学学院,四川,成都,610064

3.四川大学,化学学院,四川,成都,610064

4.四川大学,化学学院,四川,成都,610064

5.四川大学,分析测试中心,四川,成都,610064

基金项目: 高等学校博士学科点专项科研项目(20020610027)

关键词：磷酸亚铁锂 , 磷酸三丁酯 , 正极材料 , 电化学性能

Synthesis and electrochemical properties of LiFePO4 prepared by using tri-n-butyl phosphate as a multi-function agent

采用磷酸三丁酯(TBP)为多功能反应物并添加表面活性剂PEG-4000合成了LiFePO4/C正极材料,利用XRD、SEM、XPS和滴定分析对产品进行了结构、表面形貌和化学组成表征.结果表明在650℃烧结15h所得产物结晶良好,为均匀分布在100nm左右的类球形颗粒.循环伏安曲线显示,该样品具有对称且尖锐的氧化还原电位峰,表明材料具有良好的电化学可逆性.在0.1mA/cm2电流密度下,其首次充放电比容量分别为162和158mAh/g,经100次循环后放电容量损失率仅为3.3%,当充放电密度增加到4mA/cm2时,材料的放电比容量仍然接近100mAh/g,倍率性能优良.

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LiFePO4/C正极材料的液相合成及电化学性能研究

Synthesis and electrochemical properties of LiFePO4 prepared by using tri-n-butyl phosphate as a multi-function agent

参考文献