应用化学 ›› 2010, Vol. 27 ›› Issue (11): 1356-1358.DOI: 10.3724/SP.J.1095.2010.00185

• 研究简报 • 上一篇    下一篇

新方法合成LiFePO4/C

张静温1,2,张蕾蕾1,2,吴超勇1,2,张新波1,王立民1*   

  1. (1.中国科学院长春应用化学研究所,稀土资源利用国家重点实验室 长春 130022;
    2.中国科学院研究生院 北京)
  • 收稿日期:2010-03-31 修回日期:2010-04-19 出版日期:2010-11-10 发布日期:2010-11-10
  • 通讯作者: 王立民,男,研究员; E-mail:lmwang@ciac.jl.cn; 研究方向:轻金属和电池材料
  • 基金资助:
    国家自然科学基金创新群体资助项目(20921002)

A New Method for the Synthesis of LiFePO4/C

ZHANG Jing-Wen1,2, ZHANG Lei-Lei1,2, WU Chao-Yong1,2, ZHANG Xin-Bo1, WANG Li-Min1*   

  1. (1.State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of
    Applied Chemistry,Chinese Academy of Sciences,Changchun 130022;
    2.Graduate University of the Chinese Academy of Sciences,Beijing)
  • Received:2010-03-31 Revised:2010-04-19 Published:2010-11-10 Online:2010-11-10

摘要:

以Fe(NO3)3·9H2O、LiNO3、NH4H2PO4和蔗糖为原料,在超临界CO2流体中反应合成,进而经二次焙烧制得LiFePO4/C。 结果表明,在超临界CO2流体中经50 ℃反应24 h,在350和600 ℃焙烧后制得粒径分布在0.5~1.0 μm的纯LiFePO4/C,该材料作为锂离子电池正极的放电比容量达156.6 mA·h/g,经50次循环后容量几乎没有衰减。

关键词: 磷酸亚铁锂, 超临界CO2, 锂电池, 正极材料

Abstract:

With Fe(NO3)3·9H2O, LiNO3, NH4H2PO4 and sucrose as raw materials, LiFePO4/C was synthesized by using supercritical carbon dioxide at 50 ℃ for 24 h, and then being annealed at 350 ℃ and 600 ℃. The particle size of synthesized LiFePO4/C is in the range of 0.5~1.0 μm. For the electrochemical performance of LiFePO4/C as the cathode material of lithium ion battery, the initial discharge capacity is 156.6 mA·h/g, and there is no obvious capacity fading after 50 cycles.

Key words: lithium iron phosphate, supercritical carbon dioxide, lithium ion battery, cathode material

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