期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 160, 期 11, 页码 A1992-A1996出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.032311jes
关键词
-
资金
- Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory
- DOE by Battelle [DE-AC05-76RL01830]
Lithium-sulfur battery is a very promising energy storage system because of its high specific energy density. However, the dissolution and precipitation of soluble polysulfides during cycling initiate a series of chain reactions that significantly shorten battery lifespan. In order to understand the interfacial reactions occuring on the electrode surfaces, we employ a convenient electrochemical strategy to regulate the nucleation and precipitation of polysulfides on the electrode surface. The accumulation of detrimental Li2S on cathode is largely alleviated thus enabling very stable cycling of Li-S batteries. For example, more than 760 stable cycling are demonstrated with a reversible capacity of 500 mAh g(-1). More importantly, the exposure of new lithium metal surface to the S-containing electrolyte is also greatly reduced through this strategy, largely minimizing the anode corrosion caused by polysulfides. The fundamental findings of this work provide valuable information on the electrochemical redistribution process of sulfur, which is unavoidable, during cycling and the corresponding anode evolutions under different testing conditions. (C) 2013 The Electrochemical Society. 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