高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (3): 641.

• 研究论文 • 上一篇    下一篇

新型球状磷酸铁锂的合成及电化学性能

张豪杰,王开学,陈接胜   

  1. 上海交通大学化学化工学院, 上海 200240
  • 收稿日期:2010-10-14 修回日期:2011-01-01 出版日期:2011-03-10 发布日期:2011-02-23
  • 通讯作者: 陈接胜 E-mail:chemcj@sjtu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20731003)和国家自然科学基金青年基金项目(批准号: 20901050)资助.

Synthesis and Electrochemical Performance of a New Spherical LiFePO4

ZHANG Hao-Jie, WANG Kai-Xue,  CHEN Jie-Sheng*   

  1. School of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2010-10-14 Revised:2011-01-01 Online:2011-03-10 Published:2011-02-23
  • Contact: CHEN Jie-Sheng E-mail:chemcj@sjtu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20731003)和国家自然科学基金青年基金项目(批准号: 20901050)资助.

摘要: 在水热条件下,制备了水合碱式磷酸铁微球,500 oC焙烧后生成直径为5μm的碱式磷酸铁,接着与碳酸锂一起焙烧后生成了球形磷酸铁锂.我们的方法可以有效地控制所获得产物的尺寸和形貌,同时在产物表面形成均匀碳包覆,改善了磷酸铁锂的电化学性能.

关键词: 锂离子电池, 碳包覆, 磷酸铁锂, 葡萄糖

Abstract: Using glucose as a carbon source, we successfully obtained carbon-coated LiFePO4 spheres with controlled size and morphology. Fe5(PO4)4(OH)3?2H2O spheres with a diameter of about 5μm were first formed through hydrothermal reaction, and the surface of the Fe5(PO4)4(OH)3?2H2O spheres was uniformly coated with glucose. After carbonization at 500 oC, the Fe3(PO4)2(OH)2 spheres coated with carbon were obtained. Upon sintering with Li2CO3, the sphere morphology remains intact whereas the composition of the spheres converts to LiFePO4. The as-prepared LiFePO4 particles exhibit superior electrochemical performance.

Key words: Lithium iron batteries, Carbon-coating, LiFePO4, Glucose

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