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研究论文

水热还原法合成LiFePO_4及电化学性能研究

  • 邹红丽 ,
  • 张光辉 ,
  • 沈培康
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  • 中山大学光电材料与技术国家重点实验室物理科学与工程技术学院;

收稿日期: 2010-11-28

  修回日期: 2010-11-28

  网络出版日期: 2010-11-28

Hydrothermal Reduction Synthesis of LiFePO_4 and Its Electrochemical Performance

  • ZOU Hong-li ,
  • ZHANG Guang-hui ,
  • SHEN Pei-kang
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  • (The State Key Laboratory of Optoelectronic Materials and Technologies,School of Physics and Engineering,Sun Yat-Sen University,Guangzhou 510275,China

Received date: 2010-11-28

  Revised date: 2010-11-28

  Online published: 2010-11-28

摘要

以可溶性三价铁盐FeCl3为铁源,Fe粉作还原剂,应用水热还原法合成LiFePO4.XRD、红外光谱及SEM形貌表征表明,在水热条件下,铁粉能完全将三价铁还原为二价铁,得到单一相LiFePO4,且其颗粒团聚形成花簇状;而LiFePO4经过葡萄糖的热解包覆碳生成LiFePO4/C后,颗粒转变似球状.电化学性能测试结果表明,虽然单相LiFePO4的放电容量很低,但LiFePO4/C却表现出良好的倍率性能和循环稳定性.

关键词: FeCl3; Fe; 水热还原法; LiFePO4

本文引用格式

邹红丽 , 张光辉 , 沈培康 . 水热还原法合成LiFePO_4及电化学性能研究[J]. 电化学, 2010 , 16(4) : 416 -419 . DOI: 10.61558/2993-074X.2063

Abstract

The cathode materials of LiFePO4 were prepared via a hydrothermal reduction method using FeCl3 as Fe source and iron as a reducing agent.The results showed that ferric salt could be reduced to ferrous salt completely under the hydrothermal condition and pure-phase LiFePO4 was obtained based on the test results of XRD and FTIR.Carbon-coated LiFePO4 was synthesized by pyrolysisng glucose at high temperature.The morphologies of pure LiFePO4 displayed cluster-like while the LiFePO4/C displayed sphere-like particles.The electrochemical test showed that the LiFePO4/C had good rate performance,while LiFePO4 delivered much lower discharge capacity.

参考文献

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