LiFePO4/C composite with a three-dimensional foam structure constructed via evaporative self-assembly assisted by polyethylene glycol and its improved electrochemical performance

被引：3
|
作者：
Bai, Ningbo [1 ]
Li, Chunlong [1 ]
Lu, Huayu [1 ]
Xiang, Kaixiong [1 ]
Chen, Han [1 ]
机构：
[1] Hunan Univ Technol, Sch Met Engn, Zhuzhou 412007, Peoples R China
来源：
MATERIALS LETTERS | 2014年 / 137卷
基金：
中国国家自然科学基金;
关键词：
Composite materials; Crystal structure; LiFePO4; Cathode materials; Evaporative self-assembly; LITHIUM; ELECTRODE;
D O I：
10.1016/j.matlet.2014.09.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Three-dimensional foam structure LiFePO4/C composite has been successfully synthesized via evaporative self-assembly assisted by polyethylene glycol. The morphologies, structures and properties of bare LiFePO4 and LiFePO4/C are investigated by X-ray diffractometer, scanning electron microscope, and transmission electron microscope. LiFePO4/C composite exhibits high capacity of 150 mA h g(-1) at the 1 C rate, and excellent rate performance (120 mA h g(-1) at the 20 C rate). The improved properties can be attributed to a unique three-dimensional foam structure constructed by facile evaporative self-assembly. Furthermore, the unique structure can increase the electrochemical reaction surface, enhance the electrochemical conductivity and promote lithium ion diffusion. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：237 / 240
页数：4
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