A Mixed Ether Electrolyte for Lithium Metal Anode Protection in Working Lithium–Sulfur Batteries

Energy & Environmental Materials

article

Wei-Jing Chen¹  Chang-Xin Zhao²  Bo-Quan Li²  Qi Jin²  Xue-Qiang Zhang²  Tong-Qi Yuan¹  Xitian Zhang³  Zhehui Jin⁴  Stefan Kaskel⁵  Qiang Zhang² 

[1] Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University;Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University;Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University;School of Mining and Petroleum Engineering, Department of Civil and Environmental Engineering, University of Alberta;Department of Inorganic Chemistry, Dresden University of Technology;Fraunhofer Institute for Material and Beam Technology

关键词: Newborn;    Respiratory Distress Syndrome;    Brain;    Natriuretic Peptide"/>;   

DOI  :  10.1002/eem2.12073

来源: Wiley

【 摘 要 】

Lithium‒sulfur (Li–S) battery is considered as a promising energy storage system to realize high energy density. Nevertheless, unstable lithium metal anode emerges as the bottleneck toward practical applications, especially with limited anode excess required in a working full cell. In this contribution, a mixed diisopropyl ether-based (mixed-DIPE) electrolyte was proposed to effectively protect lithium metal anode in Li–S batteries with sulfurized polyacrylonitrile (SPAN) cathodes. The mixed-DIPE electrolyte improves the compatibility to lithium metal and suppresses the dissolution of lithium polysulfides, rendering significantly improved cycling stability. Concretely, Li | Cu half-cells with the mixed-DIPE electrolyte cycled stably for 120 cycles, which is nearly five times longer than that with routine carbonate-based electrolyte. Moreover, the mixed-DIPE electrolyte contributed to a doubled life span of 156 cycles at 0.5 C in Li | SPAN full cells with ultrathin 50 μm Li metal anodes compared with the routine electrolyte. This contribution affords an effective electrolyte formula for Li metal anode protection and is expected to propel the practical applications of high-energy-density Li‒S batteries.

【 授权许可】

Unknown