储能科学与技术 ›› 2013, Vol. 2 ›› Issue (2): 103-111.doi: 10.3969/j.issn.2095-4239.2013.02.003

• 特约文章 • 上一篇    下一篇

磷酸亚铁锂材料的研究与发展

费定国1, 2, 林逸全1, 2   

  1. 1 "国立中央大学"化学工程与材料工程系,中国台湾 中坜 32001;
    2 倍特利能源科技股份有限公司,中国台湾 中坜 32001
  • 收稿日期:2012-11-24 修回日期:2013-01-24 出版日期:2013-04-19 发布日期:2013-04-19
  • 作者简介:费定国(1940--),男,博士,教授,长期致力于锂电池科技的研发与推广,倍特利能源科技股份有限公司董事长,"国立中央大学"化材讲座教授,E-mail:gfey@cc.ncu.edu.tw.

A review on lithium iron phosphate cathode materials

FEY Tingkuo1, 2, LIN Yiquan1, 2   

  1. 1 Department of Chemical and Materials Engineering,Central University,Zhongli 32001,Taiwan,China;
    2 Bettery Energy Technology,Inc.,Zhongli 32001,Taiwan,China
  • Received:2012-11-24 Revised:2013-01-24 Online:2013-04-19 Published:2013-04-19

摘要: 目前全球高动力锂离子电池系统的发展主要集中在锂锰电池,锂钴镍锰电池以及锂铁电池,其中磷酸亚铁锂材料具有高电容量,高放电功率,极佳的长循环寿命以及良好的热稳定性与高温性能等优点,已成为动力锂离子电池首选的高安全性正极材料.然而,磷酸亚铁锂材料在工业化量产时,必须解决电池芯加工性差及材料一致性不佳等问题,作者曾结合多项新颖观念与技术于磷酸亚铁锂材料制做过程,在粉体表面涂布碳层,在晶体内部掺杂金属,分别改善材料电导率与锂离子扩散速度以及有效地控制碳含量,粉体比表面积,碳层均匀性,粒径大小与分布,制备出高质量磷酸亚铁锂产品.该文将回顾并探讨上述研发工作的一些重要结果.

关键词: 磷酸亚铁锂, 阴极材料, 锂离子电池

Abstract: Globally, the development of a high-power lithium-ion battery is focused on lithium manganese oxide batteries, lithium cobalt nickel manganese batteries and lithium iron phosphate batteries. Lithium iron phosphate is regarded as a practical and popular cathode material for high power lithium-ion batteries due to its high capacity, high rate capability, long cycle life, superior thermal stability and good high-temperature performance. However, the problems associated with commercial production of lithium iron phosphate material are its difficult manufacturing processes and poor material reproducibility. We combined a number of innovative concepts and techniques in the fabrication processes for high quality lithium iron phosphate. Two methods: carbon coating on the surface of the powders and metal cations doping into the crystal lattice have been used to enhance the electronic conductivity and lithium-ion diffusion of LiFePO4 material, respectively. Moreover, effective control of carbon content, surface area, uniformity of carbon layers, and particle-size distribution of powder materials were also used for the production of LiFePO4 with good reproducibility. In this paper, some pertinent results from the above work will be reviewed and discussed.

Key words: lithium iron phosphate, cathode material, lithium-ion battery

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