文献类型：期刊文献

英文题名：One-step preparation of epoxy resin-based ionic gel electrolyte for quasi-solid-state lithium metal batteries

作者：Wang, Zhennan[1];Shi, Haobo[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：2022

卷号：524

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20220511582576);WOS:【SCI-EXPANDED(收录号:WOS:000779917800005)】；

基金：Acknowledgments The financial supported by the fellowship of China Postdoctoral Science Foundation (2020M681205 and 2021T140205) are gratefully acknowledged.

语种：英文

外文关键词：Ionic gel electrolytes; Epoxy resin; Ionic liquids; Lithium metal battery

摘要：Quasi-solid-state lithium metal batteries have attracted wide attentions in recent years due to their high energy density, flexibility, and high safety. In this work, a novel epoxy resin-based ionic gel electrolyte (IGE) is synthesized via one-step curing polymerization of epoxy monomer and amine hardener with soft segments in the presence of ionic liquid electrolytes. The morphology and molecular structure of IGE are characterized by scanning electron microscopy, atomic force microscope and attenuated total reflection Fourier transform infrared. The amorphous microstructure and high thermal stability (>= 270 degrees C) are identified by X-ray diffraction and thermogravimetric analysis. The obtained IGEs show high room temperature ionic conductivity from 0.05 mS cm-1 to 1.69 mS cm-1 due to the formation of dual continuous ionic conduction. In addition, the evolution of solid electrolyte interface (SEI) between IGE and lithium metal is investigated by electrochemical impedance spectroscopy, galvanostatic charge-discharge test, and X-ray photoelectron spectroscopy. Finally, the Li/IGE/ LiFePO4 cells can maintain a discharge capacity of 157 mAh g-1 at 0.1 C after 50 cycles at 60 degrees C and 132 mAh g-1 at 0.2 C after 150 cycles at room temperature.