电解质
阳极
电化学
阴极
电池(电)
溶解
离子液体
无机化学
化学
锂硫电池
硫黄
化学工程
储能
熔盐
盐(化学)
锂(药物)
材料科学
电极
有机化学
催化作用
医学
功率(物理)
物理
物理化学
量子力学
工程类
内分泌学
作者
Yueying Peng,Rajashekar Badam,Tejkiran Pindi Jayakumar,Wannaruedee Wannapakdee,Chuchawin Changtong,Noriyoshi Matsumi
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-05-01
卷期号:169 (5): 050515-050515
被引量:8
标识
DOI:10.1149/1945-7111/ac6bc6
摘要
Lithium sulfur (Li–S) battery is an appealing energy storage system due to its high theoretical specific capacity and specific energy. However, two main challenges, lithium polysulfides (LPS) dissolution from the sulfur cathode and the unstable Li anode, impede the practical application of Li–S battery. Developing advanced electrolyte is an effective strategy to tune the stability of both sulfur cathode and Li anode. Here, a concentrated imidazolium-based ionic liquids (IL) electrolyte was explored for Li–S battery with the synergistic advantages of both IL and high concentrated electrolyte. A systematic study was conducted to reveal the effect of salt concentration on the properties of the IL electrolyte and the electrochemical performances of Li–S battery. It is found that an effective suppression of LPS dissolution and improved stability of Li anode can be obtained with increase of salt concentration. As a result, a good cycling stability of the Li–S battery is achieved in the concentrated IL electrolyte, with high capacity retention of 92% after 100 cycles at current density of 0.1 C. The concentrated electrolyte based on IL solvent exhibits good compatibility with both cathode and anode, offering a new opportunity for designing electrolyte to achieve stable electrochemical system.
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