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研究论文

LiFePO_4的制备、结构与电性能研究

  • 谢辉
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  • 电子科技大学中山学院化学与生物系,华南理工大学材料科学与工程学院 广东中山528402,华南理工大学材料科学与工程学院广东广州510640,广东广州510640

收稿日期: 2006-11-28

  修回日期: 2006-11-28

  网络出版日期: 2006-11-28

The Synthesis,Structure and Electrochemical Performances of Lithium Iron Phosphate

  • XIE Hui~
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  • (1,2*),ZHOU Zhen-tao~2(1.Department of Chemistry and Biology,Zhongshan Institute,University of Electronic Science & Technology of China,Zhongshan 528402,Guangdong,China,2.College of Material Science & Engineering,South-China University of Technology,Guangzhou 510640,Guangdong,China

Received date: 2006-11-28

  Revised date: 2006-11-28

  Online published: 2006-11-28

摘要

应用高速球磨-高温固相反应法于不同煅烧温度(400~700℃)下合成L iFePO4锂离子电池正极材料,X-射线衍射、扫描电镜和恒电流充放电等测试表明,煅烧温度对合成的L iFePO4晶体结构、表观形貌以及电化学性能均有很大影响;经600℃煅烧得到的L iFePO4样品具有良好的充放电性能,以0.1C倍率充放电,首次放电比容量为128.8 mAh/g,第15次放电比容量为129.1 mAh/g,充放电效率在99.7%以上;其高温充放电性能亦佳.

本文引用格式

谢辉 . LiFePO_4的制备、结构与电性能研究[J]. 电化学, 2006 , 12(4) : 378 -381 . DOI: 10.61558/2993-074X.1756

Abstract

The lithium iron phosphate cathode materials were synthesized by solid-state reaction combined high-rate ball milling under the temperature ranging from 400 ℃ to 700 ℃.The crystalline structure,morphology of particles,and electrochemical performance of the sample were investigated by X-ray diffraction,scanning electron microscopy and charge-discharge test.The results showed that the sintering temperature had great influences on the crystal structure,morphology and electrochemical performances of LiFePO_(4).The sample synthesized under 600℃ showed the best charge-discharge performances with the first specific discharge capacity of(128.8) mAh/g and the 15~(th) specific discharge capacity of 129.1 mAh/g at 0.1C rate,each charge-discharge cycling efficiency being 99.7%.Also the sample showed good electrochemical performances under higher temperatures.

参考文献

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