Li2FeSiO4/C正极材料的固相合成及电化学性能

孙姣丽; 陈志娇; 李益孝; 程琥

doi:10.13208/j.electrochem.130352

电化学 >

2013 , Vol. 19 >Issue 6: 575 - 578

DOI: https://doi.org/10.13208/j.electrochem.130352

锂离子电池近期研究专辑 (厦门大学杨勇教授主编)

Li₂FeSiO₄/C正极材料的固相合成及电化学性能

孙姣丽 ,
陈志娇 ,
李益孝 ,
程琥

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1. 贵州师范大学化学与材料科学学院，贵州贵阳 550001；2. 厦门大学化学化工学院化学系，福建厦门 361005

收稿日期: 2013-03-05

修回日期: 2013-05-27

网络出版日期: 2013-12-23

基金资助

贵州省重大专项（黔科合重大专项字[2011]6015）及贵州省科学技术基金（黔科合J字[2012]2284）资助

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Synthesis and Electrochemical Property of Li₂FeSiO₄/C Cathode Material by Solid State Method

SUN Jiao-Li ,
CHEN Zhi-Jiao ,
LI Yi-Xiao ,
CHENG Hu

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1. School of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, Guizhou, China; 2. College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China

Received date: 2013-03-05

Revised date: 2013-05-27

Online published: 2013-12-23

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摘要

以偏硅酸锂、草酸亚铁为原料，通过机械球磨-固相烧结法制得了Li₂FeSiO₄/C正极材料. 用X射线衍射（XRD）和扫描电子显微镜（SEM）表征观察材料的结构和形貌.恒流充放电测试电极电化学性能. 结果表明，30 oC下，1.5 V ～ 4.8 V电位范围，于10 mAg^-1电流密度恒流充放电测试，Li₂FeSiO₄/C电极首次放电容量达167 mAhg^-1，有良好的电化学性能.

关键词： Li2FeSiO4; 正极材料; 锂离子电池

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孙姣丽 , 陈志娇 , 李益孝 , 程琥 . Li₂FeSiO₄/C正极材料的固相合成及电化学性能[J]. 电化学, 2013 , 19(6) : 575 -578 . DOI: 10.13208/j.electrochem.130352

Abstract

Li2FeSiO4/C cathode material was synthesized using Li₂SiO₃ and FeC₂O₄ as raw materials by solid state method. The structure and morphology of the material were characterized by XRD and SEM. The electrochemical properties of the material were studied by constant-current cyclic testing. The results show that Li₂FeSiO₄/C has a good electrochemical performance. The first discharge capacity of Li₂FeSiO₄/C cathode material at 30oC reached 167 mAhg^-1 when cycled at 10 mAg^-1 between 1.5 and 4.8 V.

Key words： Li2FeSiO4; cathode material; lithium ion battery

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