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电化学(中英文) ›› 2013, Vol. 19 ›› Issue (2): 189-192.  doi: 10.61558/2993-074X.2112

• 研究简报 • 上一篇    下一篇

壳聚糖单体溶胶凝胶煅烧合成LiFePO4/C正极

徐 嘉1,王艳艳1,王 蕊2,王 博1,潘 越1,曹殿学1,王贵领1*   

  1. 1. 哈尔滨工程大学材料科学与化学工程学院,黑龙江 哈尔滨 150001;2. 哈药集团三精制药有限公司,黑龙江 哈尔滨,150069
  • 收稿日期:2012-01-05 修回日期:2012-02-11 出版日期:2013-04-28 发布日期:2012-02-21
  • 通讯作者: 王贵领 E-mail:wangguiling@hrbeu.edu.cn
  • 基金资助:

    国家自然科学基金项目(No. 20973048)资助

Synthesis of LiFePO4/C Cathode by Sol-gel and Calcining Method with Chitosan Monomer

XU Jia1, WANG Yan-Yan1, WANG Rui2, WANG Bo1, PAN Yue1, CAO Dian-Xue1, WANG Gui-Ling1*   

  1. 1. College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; 2. Harbin Pharm. Group Sanjing Pharmaceutical Shareholding Co., Ltd, Harbin 150069, China
  • Received:2012-01-05 Revised:2012-02-11 Published:2013-04-28 Online:2012-02-21
  • Contact: WANG Gui-Ling E-mail:wangguiling@hrbeu.edu.cn

摘要: 本文以壳聚糖单体为碳源兼凝胶剂,利用溶胶-凝胶煅烧合成了锂离子电池LiFePO4/C正极材料,使用XRD和SEM对合成的材料进行表征. 用恒电流充放电测试了LiFePO4/C电极的电化学性能,当壳聚糖单体与LiFePO4摩尔比为1:1.2时,600 oC煅烧的LiFePO4/C电极性能最佳,其粒径分布均匀(200 ~ 400 nm),该电极0.2C倍率放电比容量为155 mAh.g-1,30周期循环放电比容量仍保持152 mAh.g-1,库仑效率为97.9 %.

关键词: 壳聚糖, 磷酸亚铁锂, 溶胶-凝胶法, 锂离子电池

Abstract: The LiFePO4/C cathode materials for Li-ion battery were synthesized by sol-gel and calcining method using chitosan monomer as a carbon source and a gelating agent. The structures and morphologies were characterized by X-ray diffraction spectroscopy (XRD) and scanning electron microscopy (SEM). The electrochemical performance was investigated by the galvanostatic charge–discharge test. When the molar ratios between chitosan monomer and LiFePO4 were 1:1.2, the LiFePO4/C cathode calcined at 600 oC showed the best performance. The particle sizes ranged 200 ~ 400 nm. The initial discharge capacity of 155 mAh.g-1 was achieved at room temperature with discharge rate of 0.2C, while the capacity of 152 mAh.g-1 could be maintained after 30 charge-discharge cycles. The coulombic efficiency was 97.9%.

Key words: chitosan, LiFePO4/C, sol-gel method, Li-ion battery

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