电化学与能源技术分享 http://blog.sciencenet.cn/u/林凡 更新博客 http://blog.sina.com.cn/u/1412040585

博文

[转载]中孔聚苯胺/二氧化钛核壳式结构微球:锂离子电池负极材料

已有 2044 次阅读 2011-1-30 14:02 |个人分类:锂离子电池负极|系统分类:论文交流|关键词:二氧化钛| 二氧化钛 |文章来源:转载

Return your view to full page Focus your view . this article
Journal of Power Sources
Article in Press, Accepted Manuscript - Note to users
doi:10.1016/j.jpowsour.2011.01.077 | How to Cite or Link Using DOI
Copyright © 2011 Published by Elsevier B.V.
  Permissions & Reprints


Mesoporous polyaniline/TiO2 microspheres with core-shell structure as anode materials for lithium ion battery

C. Laia, H.Z. Zhanga, G.R. Lia and X.P. GaoCorresponding Author Contact Information, a, E-mail The Corresponding Author

a Institute of New Energy Material Chemistry, Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China,

Received 7 November 2010; 
revised 7 January 2011; 
accepted 20 January 2011. 
Available online 28 January 2011.

Abstract

Mesoporous polyaniline/anatase TiO2 composite microspheres with the core-shell structure for lithium-ion battery applications are prepared via a facile hydrothermal route. The structure of as-prepared sample is characterized by electron microscopy (TEM), and scanning electron microscopy (SEM), X-ray diffraction (XRD), and Brunauer–Emmett–Teller (BET) surface area. It is suggested that the formation of the core-shell structure can be designated as a two-step assembly process induced by the polymerization of the aniline. The electrochemical tests demonstrate that the discharge capacity of the as-prepared polyaniline/anatase TiO2 microspheres can be stably retained at 157.1 mAh g−1 after 50th cycle at the high current density of 1500 mA g−1. The high rate performance of the as-prepared sample at various current densities from 200 to 2000 mA g−1 is also investigated. The discharge capacity of 123.9 mAh g−1 can be obtained at the high current density of 2000 mA g−1, which is about 73.4% of that at the low current density of 200 mA g−1 upon cycling, indicating that the as-prepared sample can endure great changes of various current densities to retain a good stability due to the core shell mesoporous structure.

Keywords: Lithium-ion batteries; Titanium dioxide; Polyaniline; Mesoporous; Core-shell.



http://blog.sciencenet.cn/blog-49800-409148.html

上一篇:[转载]电化学交流阻抗谱研究气体扩散层压缩率对燃料电池性能的影响
下一篇:[转载]墨西哥城实行混合动力汽车技术评估报告

0

发表评论 评论 (0 个评论)

数据加载中...

Archiver|手机版|科学网 ( 京ICP备14006957 )

GMT+8, 2019-11-20 09:08

Powered by ScienceNet.cn

Copyright © 2007- 中国科学报社

返回顶部