改进Sol-gel法合成LiFePO4正极材料及其电化学性能

被引:2
作者
徐峙晖 [1 ]
徐亮 [1 ]
赖琼钰 [1 ]
吉晓洋 [2 ]
机构
[1] 四川大学化学学院
[2] 四川大学分析测试中心
关键词
磷酸锂铁; sol-gel; 正极材料; 电化学性能;
D O I
10.15961/j.jsuese.2006.05.019
中图分类号
TM912 [蓄电池];
学科分类号
0808 ;
摘要
为了获得颗粒均匀、细小和电化学性能优异的L iFePO4,采用sol-gel方法并添加表面活性剂聚乙二醇(PEG)制备L iFePO4/C。制备样品分别用XRD和SEM进行表征,通过充放电和循环伏安测试电化学性能。结果表明,nPEG/nLFP=1∶1、600℃制得样品颗粒均匀,平均粒径约为100 nm,在2.0~4.0 V(vs.L i)范围内,15 mA/g电流密度下放电,首次放电比容量为158 mAh/g,是理论容量的92.9%。制备样品展现良好的倍率性能和循环性能。
引用
收藏
页码:112 / 116
页数:5
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