壳聚糖单体溶胶凝胶煅烧合成LiFePO4/C正极

doi:10.61558/2993-074X.2112

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

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. 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-Ling^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/Abstract

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 LiFePO₄were 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

中图分类号:

O611.4

徐嘉, 王艳艳, 王蕊, 王博, 潘越, 曹殿学, 王贵领. 壳聚糖单体溶胶凝胶煅烧合成LiFePO₄/C正极[J]. 电化学（中英文）, 2013, 19(2): 189-192.

XU Jia, WANG Yan-Yan, WANG Rui, WANG Bo, PAN Yue, CAO Dian-Xue, WANG Gui-Ling. Synthesis of LiFePO₄/C Cathode by Sol-gel and Calcining Method with Chitosan Monomer[J]. Journal of Electrochemistry, 2013, 19(2): 189-192.

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壳聚糖单体溶胶凝胶煅烧合成LiFePO₄/C正极

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

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