A Novel Zwitterionic Ionic Liquid-Based Electrolyte for More Efficient and Safer Lithium-Sulfur Batteries

Zhang，Zhijun1; Zhang，Peng2,3; Liu，Zhenjie2; Du，Binyang1; Peng，Zhangquan2

2020-03-11

10.1021/acsami.9b21655

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

The shuttle effect of polysulfide and the flammability of the conventional electrolyte are the two major obstacles restricting the development progress of lithium-sulfur batteries. Exploring highly efficient electrolyte components coupled with the conventional electrolyte is a reliable strategy to solve these issues. However, the current electrolyte components usually relieve these issues at the expense of the sacrificed electrochemical performance. Herein, a novel zwitterionic ionic liquid named as TLTFSI is reported, which exhibits a high ionic conductivity of 3.7 × 10 S cm, a wide electrochemical potential window from 1.51 to 4.82 V at 25 °C, and a high thermal decomposition temperature of 275 °C. The optimized TLTFSI-based electrolyte is nonflammable and performs superior electrochemical performance in terms of larger capacity, better rate capability, and longer cyclic life compared with the conventional organic electrolyte. The robust performance is attributed to the high intrinsic ionic conductivity, the suppressed polysulfide dissolution/diffusion, and the high interface compatibility toward the lithium anode of the TLTFSI-based electrolytes. This present work represents the first demonstration of the zwitterionic ionic liquid to efficiently improve the overall electrochemical performance and the safety of lithium-sulfur batteries.

electrolyte lithium-sulfur battery long cyclic life nonflammability zwitterionic ionic liquid

SCI ; EI

英语

其他

Open Research Fund of State Key Laboratory of Polymer Physics and Chemistry[201601]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000526609100033

AMER CHEMICAL SOC

20201308355708

Lithium sulfur batteries ; Polysulfides ; Ionic liquids ; Ionic conductivity ; Lithium batteries ; Decomposition

Electric Batteries and Fuel Cells:702 ; Primary Batteries:702.1.1 ; Secondary Batteries:702.1.2 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Synthetic Rubber:818.2.1

2-s2.0-85081945280

Scopus

1.MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou,310027,China
2.Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,130022,China
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Zhang，Zhijun,Zhang，Peng,Liu，Zhenjie,et al. A Novel Zwitterionic Ionic Liquid-Based Electrolyte for More Efficient and Safer Lithium-Sulfur Batteries[J]. ACS Applied Materials & Interfaces,2020,12(10):11635-11642.

Zhang，Zhijun,Zhang，Peng,Liu，Zhenjie,Du，Binyang,&Peng，Zhangquan.(2020).A Novel Zwitterionic Ionic Liquid-Based Electrolyte for More Efficient and Safer Lithium-Sulfur Batteries.ACS Applied Materials & Interfaces,12(10),11635-11642.

Zhang，Zhijun,et al."A Novel Zwitterionic Ionic Liquid-Based Electrolyte for More Efficient and Safer Lithium-Sulfur Batteries".ACS Applied Materials & Interfaces 12.10(2020):11635-11642.