Li_(1.05)Fe(PO_4)_(1-x)(GeO_3)_x/C正极材料的制备及性能研究  

SYNTHESIS OF THE Li_(1.05)Fe(PO_4)_(1-x)(GeO_3)_x/C CATHODE MATERIALS AND THEIR ELECTROCHEMICAL PERFORMANCE

作　　者：李变云[1] 鲍雨[1] 黄维静[1] 童庆松[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007

出　　处：《华南师范大学学报（自然科学版）》2009年第A02期66-67,78,共3页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20973038);福建省发改委项目(闽发改高技2008[794]);福建省自然科学基金资助项目(2008J0144);福建省科技厅项目(2009I0007)

摘　　要：采用固相烧结法,在惰性气氛下制备了橄榄石型Li1.05Fe(PO4)1-x(GeO3)x/C(x=0.021,0.054,0.086)复合材料.采用X粉末衍射仪、充放电循环、循环伏安和交流阻抗等现代测试手段表征制备的样品的电化学性能.实验结果表明:掺锗可显著改善LiFePO4的大电流放电性能.理论组成为Li1.05Fe(PO4)0.95(GeO3)0.054/C的样品的电化学性能最佳.Li1.05Fe（PO4）1-x（GeO3）x/C （x=0.021,0. 054,0. 086） composites were prepared by using a solid state reaction under inert atmosphere. XRD, charge - discharge cycling, cyclic voltammetry, electrochemical impedance and other advanced techniques were employed to measure the electrochemical performance of the as - prepared samples. The experimental results show that the Ge dopant obviously improves the electrochemical performance of the samples while they discharge at a high rate. TheLi1.05Fe（PO4）1-x（GeO3）x/Csample exhibits the best electrochemical performance in the as -prepared samples.

关 键 词：锂离子电池 掺杂Ge 磷酸亚铁锂 正极材料 

分 类 号：TM912.9[电气工程—电力电子与电力传动]