期刊
NANO ENERGY
卷 13, 期 -, 页码 467-473出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2015.02.021
关键词
Lithium sulfide; Ionic liquid; Carbon coating; Lithium-sulfur batteries
类别
资金
- DoE ARPA-E [DEAR0000389]
- Maryland NanoCenter and its NispLab
The reversibility and stability of Li2S electrode can be improved by carbon coating on nano sized Li2S. However, how to uniformly coat a dense layer of carbon on nano sized Li2S is still challenge so far. Here, we utilized a novel (Towable ionic liquid (1-Ethyl-3-methylimidazolium dicyana-mide) as a carbon precursor to uniformly coat a dense carbon on Li2S nano-clusters. The carbon coated nano-Li2S cathode displays not only much high active material utilization (826 mAh/g at 0.1 C) due to short lithium ion diffusion distance and low charge transfer resistance, but also long cycling stability (82% of capacity retention after 500 cycles at 1 C) with near 100% Coulombic efficiency due to encapsulation of the lithium polysulfide within the carbon cage. (C) 2015 Elsevier Ltd. 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