文献类型：期刊文献

英文题名：Covalent Organic Frameworks-Enhanced Ionic Conductivity of Polymeric Ionic Liquid-Based Ionic Gel Electrolyte for Lithium Metal Battery

作者：Wang, Zhennan[1];Zheng, Weizhong[1];Sun, Weizhen[1];Zhao, Ling[1,2];Yuan, Weikang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]XinJiang Univ, Sch Chem & Chem Engn, Urumqi 830046, Peoples R China

年份：2021

卷号：4

期号：3

起止页码：2808

外文期刊名：ACS APPLIED ENERGY MATERIALS

收录：;EI(收录号：20211410176679);WOS:【SCI-EXPANDED(收录号:WOS:000636714000085)】；

基金：The financial supported by the fellowship of China Postdoctoral Science Foundation (2020 M681205) and Shanghai Super postdoctoral incentive plan are gratefully acknowledged. Additional support was provided by Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：ionic gel electrolytes; covalent organic frameworks; ionic liquids; molecular dynamics simulation; lithium metal battery

摘要：Ionic gel electrolyte (IGE) is considered as the promising next-generation safe electrolyte for lithium metal battery (LMB). Herein, the stable crystalline porous material TPB-DMTP-COF (TPB, triphenylbenzene; DMTP, dimethoxy terephthaldehyde), added in the polymeric ionic liquid/ionic liquid (PIL/IL)-based IGE was studied as high ionic liquid loading filler, providing a fast ion channel to enhance ionic conductivity for better performance of LMB. The ionic conductivity of the composite PIL/IL-based IGE with TPB-DMTP-COF at 30 degrees C is 0.28 mS cm(-1) , similar to 2.2 times higher than the PIL/IL-based IGE without COF and reaches 1.26 mS cm(-1) at 60 degrees C. The enhanced ionic conductivity can be attributed to the higher content of ILs in the composite IGE with TPB-DMTP-COF, the breaking of Coulombic ordering of ILs, and the faster diffusion of the anions of ILs in the pore center of TPB-DMTP-COF, revealed by molecular dynamics simulation. The better rate performance and long cycle (up to 800 at 1 C) of the composite IGE with COFs was obtained through the charge-discharge test. These findings indicate that the IGE obtained in this work has considerable advantages as promising electrolytes for LMBs.