期刊
JOURNAL OF ENERGY CHEMISTRY
卷 51, 期 -, 页码 378-387出版社
ELSEVIER
DOI: 10.1016/j.jechem.2020.03.065
关键词
TiO2; TiN; Electrospinning; Lithium-sulfur batteries; Carbon nanofibers; Yolk-shell structure
资金
- National Natural Science Foundation of China [51972287, 51502269]
- Natural Science Foundation of Henan Province [182300410187]
- Outstanding Young Talent Research Fund of Zhengzhou University [1521320023]
Nanostructure design holds great potential in fabricating sulfur electrodes that host a high sulfur loading and still attain high electrochemical utilization for the developing of high-energy-density lithium-sulfur (Li-S) batteries. In this contribution, we introduce the yolk-shell structure into a freestanding carbon nanofibers film and construct a complete hollow yolk-shell TiO2/carbon nanofibers@void@TiN@carbon (TiO2-CNFs@void@TiN@C) composite. With inherent double conductive network and strong adsorption capability for polysulfides, the TiO2-CNFs@void@TiN@C composite can not only provide sufficient electrical contact for the insulating sulfur, but also effectively entrap polysulfides for prolonged cycle life. As a result, an excellent capacity retention ratio of 60.9% after 1000 cycles at 1 C as well as a high capacity of 688.5 mAh g(-1) at 5 degrees C rate is accomplished with the cells employing TiO2-CNFs@void@TiN@C as a cathode substrate for sulfur. Moreover, the TiO2-CNFs@void@TiN@C composite, with a high S mass loading of 9.5 mg cm(-2), delivers a superb areal capacity of 8.2 mAh cm(-2). (c) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据