共沉淀法制备锂离子电池正极材料LiFePO4及其性能研究

被引：20

作者：

杨威

曹传堂

曹传宝

机构：

[1] 北京理工大学材料科学研究中心

[2] 北京理工大学材料科学研究中心北京

[3] 北京

来源：

材料工程 | 2005年 / 06期

关键词：

锂离子电池; 正极材料; LiFePO4; 共沉淀法;

D O I：

暂无

中图分类号：

TM911.4 [燃料电池];

学科分类号：

0808 ;

摘要：

用共沉淀的方法制备了改性的锂离子电池正极材料LiFePO4,利用X射线衍射(XRD)、扫描电镜(SEM)、傅立叶红外光谱(FTIR)等方法对样品的晶体结构、表观形貌、谱学性质等进行了分析研究,并在表观形貌和电性能上与固相法制备的样品进行比较。结果表明,此种方法制备的LiFePO4为单一的橄榄石型晶体结构,具有3.4V左右的放电电压平台,该材料具有良好的电性能,分别以0.2,0.4mA/cm2的电流密度充放电,首次放电比容量达到142.3,127mAh/g,充放电循环20次后放电比容量仍保持在129.7,105.5mAh/g。

引用

页码：36 / 40

页数：5

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