Chen, W.; Yi, Y.; Hai, F.; Wu, Z.; Guo, J.; Tian, X.; Gao, X.; Tang, W.; Li, M. A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries. Batteries2023, 9, 452.
Chen, W.; Yi, Y.; Hai, F.; Wu, Z.; Guo, J.; Tian, X.; Gao, X.; Tang, W.; Li, M. A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries. Batteries 2023, 9, 452.
Chen, W.; Yi, Y.; Hai, F.; Wu, Z.; Guo, J.; Tian, X.; Gao, X.; Tang, W.; Li, M. A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries. Batteries2023, 9, 452.
Chen, W.; Yi, Y.; Hai, F.; Wu, Z.; Guo, J.; Tian, X.; Gao, X.; Tang, W.; Li, M. A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries. Batteries 2023, 9, 452.
Abstract
Ionic gel electrolyte retains the characteristics of non-volatilization, non-flammability and outstanding electrochemical stability of ionic liquid, and shows good electrochemical performance combined with the excellent characteristics of different matrix materials, which is considered to be the best choice to achieve the high energy density and safety at the same time. In this paper, a flexible and self-healing ionic gel electrolyte is prepared by solvent-assisted method based on a zteric ion (ZI) copolymer. Abundant hydrogen bonds and synergistic interaction of ions in the electrolyte system endowed it with wonderful self-healing ability. The ionic conductivity of 9.06×10-4 S cm-1 at room temperature was achieved. Besides, the tLi+ was also increased to 0.312. The self-healing function of the ionic gel electrolyte ensured the long-term tolerance of the SHIGE. The capacity retention rate of the Li//LiFePO4 battery is 96% after 155 cycles at 0.1 C at 60 oC. This polymer electrolyte is expected to solve the problem of increasing polarization，which is caused by the low lithium ions migration number in ionic liquid electrolyte. And ultimately, it gives rise to a good rate performance.
Keywords
flexible electrolyte; flame-retardant; self-healing; gel electrolyte; lithium metal batteries
Subject
Chemistry and Materials Science, Electrochemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
