高密度球形LiFePO4的合成及性能

被引：44
作者：
雷敏
应皆荣
姜长印
万春荣
机构：
[1] 清华大学核能与新能源技术研究院
来源：
电源技术 | 2006年 / 01期
关键词：
锂离子蓄电池; 正极材料; LiFePO4; 高密度; 球形; 控制结晶法;
D O I：
暂无
中图分类号：
TM912 [蓄电池];
学科分类号：
摘要：
通过控制结晶法制备球形前驱体FePO4·xH2O,经过预烧得到高密度的FePO4,与Li2CO3和葡萄糖均匀混合,采用碳热还原法合成锂离子蓄电池正极材料球形磷酸铁锂（LiFePO4）。用X光衍射和扫描电镜分析对FePO4和LiFePO4的结构进行了表征。充放电测试表明LiFePO4具有3.4V放电电压平台,在0.1mA/cm2电流密度条件下,首次充电比容量为146.9mAh/g,放电比容量为129.7mAh/g。该球形LiFePO4粉末的振实密度高达1.8g/cm3,首次放电比容量高达233.5mAh/cm3,远高于一般非球形LiFePO4正极材料。
引用
收藏
页码：11 / 13
页数：3
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