Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (21): 2632-2636.DOI: 10.6023/A1103312B Previous Articles     Next Articles

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以二甲亚砜水溶液为反应介质低温合成纳米级磷酸亚铁锂

常照荣*,刘瑶,汤宏伟,赵海丽,黄静   

  1. (河南师范大学化学与环境科学学院 新乡 453007)
  • 收稿日期:2011-03-31 修回日期:2011-06-15 出版日期:2011-11-14 发布日期:2011-07-04
  • 通讯作者: 常照荣 E-mail:czr_56@163.com
  • 基金资助:

    低共熔混合锂盐合成高密度锂离子电池正极材料的研究

Low Temperature Synthesis of LiFePO4/C Nanocomposite in DMSO/H2O System

CHANG Zhao-Rong, LIU Yao, TANG Hong-Wei, ZHAO Hai-Li, HUANG Jing   

  1. (College of Chemistry and Environmental Science, Henan Normal University, Xinxiang 453007)
  • Received:2011-03-31 Revised:2011-06-15 Online:2011-11-14 Published:2011-07-04

Nanometer-sized LiFePO4 with a well-developed olivine-type structure was synthesized in the dimethyl sulfoxide (DMSO)/H2O system under ambient pressure and 108 ℃. From IR analysis, less amount of Fe3+ ions were proved to exist in the composite by solution-phased method. The sphere-like LiFePO4/C nanocomposite was obtained by sintering the mixture of nanometer-sized LiFePO4 and glucose at 600 ℃ under inert atmosphere for 3 h. The electrochemical tests showed the specific capacity of LiFePO4/C nanocomposites at discharge rates of 0.2 C was 157.2 mAh/g. A capacity of 126.1 mAh/g at 5 C and 103.4 mAh/g at 10 C was even achievable, with no significant capacity fading after 200 cycles.

Key words: solution-phased method, low temperature synthesis, lithium ion battery, LiFePO4/C, dimethyl sulfoxide (DMSO)