Coating of sulfur particles with manganese oxide nanowires as a cathode material in lithium-sulfur batteries

被引：42
作者：
Lee, Jeongyeon [1 ,2 ]
Hwang, Taejin [1 ,2 ]
Lee, Yongho [1 ,3 ]
Lee, Joong Kee [1 ,2 ]
Choi, Wonchang [1 ,2 ]
机构：
[1] Korea Inst Sci & Technol, Ctr Energy Convergence Res, Seoul 136791, South Korea
[2] Korea Univ Sci & Technol, Dept Energy & Environm Engn, Daejeon, South Korea
[3] Korea Univ, Dept Chem & Biol Engn, Seoul 136701, South Korea
来源：
MATERIALS LETTERS | 2015年 / 158卷
基金：
新加坡国家研究基金会;
关键词：
Lithium-sulfur battery; Sulfur; Metallic oxide; LI-S BATTERIES; PERFORMANCE; COMPOSITE;
D O I：
10.1016/j.matlet.2015.06.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
alpha-MnO2 nanowires were synthesized by a hydrothermal method and then mixed with agglomerated sulfur powders. Homogeneous alpha-MnO2-coated sulfur particles were obtained by utilizing heat treatment intended to melt and recrystallize the sulfur. alpha-MnO2 nanowires lead to the suppression in re-agglomeration of sulfur powders during heat treatment and result in successful coating as well as decreased size in parent sulfur powders. The alpha-MnO2-coated sulfur particles were used as the cathode material for lithium-ion battery applications. Electrochemical evaluation such as the rate capability characteristics and impedance study indicates that the alpha-MnO2 coated sulfur cathode shows lower resistance and improved rate capability compared to a pristine sulfur cathode. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：132 / 135
页数：4
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