多元醇法合成纳米LiCoPO4及其电化学性能

doi:10.13208/j.electrochem.130355

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (6): 585-589. doi: 10.13208/j.electrochem.130355

• 锂离子电池近期研究专辑 (厦门大学杨勇教授主编) • 上一篇下一篇

多元醇法合成纳米LiCoPO₄及其电化学性能

王飞^1,2，杨军^2*

1. 淮北师范大学化学与材料科学学院，安徽淮北 235000；2. 上海交通大学化学化工学院，上海 200240

收稿日期:2013-05-08 修回日期:2013-05-25 出版日期:2013-12-28 发布日期:2013-12-23
通讯作者: 杨军 E-mail:yangj723@sjtu.edu.cn
基金资助:
安徽省自然科学基金项目(No. 1308085QB41)和上海市科研计划项目(No. 11DZ1100206)资助

Synthesis and Electrochemical Performance of Nano LiCoPO₄by Polyol Method

WANG Fei^1,2，YANG Jun^2*

1. School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, China; 2. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2013-05-08 Revised:2013-05-25 Published:2013-12-28 Online:2013-12-23
Contact: YANG Jun E-mail:yangj723@sjtu.edu.cn

摘要/Abstract

摘要： 采用多元醇法合成了高电位LiCoPO₄正极材料. 以甲苯为碳源，在LiCoPO₄表面化学气相沉积包覆一层厚度约3 nm的导电碳层. 通过XRD、SEM、TEM、CV以及恒流充放电曲线等方法分析、观察和测试样品的晶体结构、微观形貌以及电化学性能. 结果表明，多元醇法合成的样品为纯相LiCoPO₄，碳包覆LiCoPO₄/C电极0.1C倍率首次放电容量达到132 mAh·g^-1，50周期循环容量保持78%. 循环伏安和微分容量曲线表明LiCoPO₄/C电极的充放电过程Li⁺脱出和嵌入均为两步步骤.

关键词: 多元醇法, LiCoPO₄, 化学气相沉积, 碳包覆

Abstract: High potential LiCoPO₄ cathode material was synthesized by polyol method. Carbon layer of ca. 3 nm thick was coated on the LiCoPO4 surfaces by chemical vapor deposition from methylbenzene. Crystalline structure, morphology and electrochemical performance of the sample were studied by XRD, SEM, TEM, CV and galvanostatic charge/discharge curve. The synthesized material via polyol method showed a pure phase of LiCoPO₄. The LiCoPO₄/C electrode delivered a high discharge capacity of 132 mAh·g^-1 and maintained 78% of the initial capacity after 50 cycles at 0.1C rate. The two-step extraction/insertion behavior of Li⁺ in LiCoPO4/C was observed from cyclic voltammogram and differential capacitance curves.

Key words: polyol method, LiCoPO4, chemical vapor deposition, carbon coating

中图分类号:

O646

王飞，杨军*. 多元醇法合成纳米LiCoPO₄及其电化学性能[J]. 电化学（中英文）, 2013, 19(6): 585-589.

WANG Fei，YANG Jun*. Synthesis and Electrochemical Performance of Nano LiCoPO₄by Polyol Method[J]. Journal of Electrochemistry, 2013, 19(6): 585-589.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.130355

https://electrochem.xmu.edu.cn/CN/Y2013/V19/I6/585

参考文献

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多元醇法合成纳米LiCoPO₄及其电化学性能

Synthesis and Electrochemical Performance of Nano LiCoPO₄by Polyol Method

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