高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (7): 1418-1424.doi: 10.7503/cjcu20190169

• 物理化学 • 上一篇    下一篇

碳包覆氟化亚铁纳米复合材料的制备及电化学性能

姚枫楠, 李瑀, 封伟()   

  1. 天津大学材料科学与工程学院, 天津 300072
  • 收稿日期:2019-03-20 出版日期:2019-06-28 发布日期:2019-07-09
  • 作者简介:

    封 伟, 男, 博士, 教授, 博士生导师, 主要从事储能材料研究. E-mail: weifeng@tju.edu.cn

  • 基金资助:
    国家自然科学基金(批准号: 51773147)和国家杰出青年科学基金(批准号: 51425306)资助.

Synthesis and Electrochemical Performance of Carbon-coated FeF2 Nanocomposite

YAO Fengnan, LI Yu, FENG Wei*()   

  1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
  • Received:2019-03-20 Online:2019-06-28 Published:2019-07-09
  • Contact: FENG Wei E-mail:weifeng@tju.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51773147) and the National Natural Science Funds for Distinguished Young Scholars, China(No.51425306).

摘要:

通过高温热分解法制备了碳包覆氟化亚铁纳米复合材料(FeF2/C), 并对其结构、 形貌及电化学性能进行了研究. 结果表明, 该方法对FeF2实现了碳包覆, 且形成部分碳化铁(Fe3C). 电化学性能测试结果表明, 该材料在0.1C倍率下循环100周后的放电比容量达到246.7 mA·h/g, 相比于第2周的容量保持率高达93.6%, 具有良好的循环稳定性.

关键词: 氟化亚铁, 碳包覆, 正极材料, 锂离子电池

Abstract:

A hybrid nanostructure of FeF2 coated by carbon was synthesized through thermal decomposition at high temperature, and its structure and morphology were characterized. The results show that FeF2 is successfully coated by carbon, and Fe3C is partially formed. The electrochemical measurements show the obtained material displays a reversible discharge capacity of 246.7 mA·h/g after 100 cycles at 0.1C, and the capacity retention is up to 93.6% compared with the discharge capacity at the second cycle, exhibiting excellent cycling stability.

Key words: FeF2, Carbon coating, Cathode material, Lithium-ion battery

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