A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries
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 bes...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Batteries |
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| Online Access: | https://www.mdpi.com/2313-0105/9/9/452 |
| _version_ | 1797581274749075456 |
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| author | Wenting Chen Yikun Yi Feng Hai Zhendi Wu Jingyu Guo Xiaolu Tian Xin Gao Wei Tang Mingtao Li |
| author_facet | Wenting Chen Yikun Yi Feng Hai Zhendi Wu Jingyu Guo Xiaolu Tian Xin Gao Wei Tang Mingtao Li |
| author_sort | Wenting Chen |
| collection | DOAJ |
| description | 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 high energy density and safety at the same time. In this paper, a flexible and self-healing ionic gel electrolyte was prepared using a 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 remarkable self-healing ability. An ionic conductivity of 9.06 × 10<sup>−4</sup> S cm<sup>−1</sup> at room temperature was achieved. Moreover, the lithium-ion transference number was increased to 0.312. The ionic gel electrolyte has a self-healing function which guarantees long-term tolerance during charging and discharging. The capacity retention rate of the Li//LiFePO<sub>4</sub> battery was 96% after 155 cycles at 0.1 C at 60 °C. 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 gave rise to a good rate performance. |
| first_indexed | 2024-03-10T23:02:02Z |
| format | Article |
| id | doaj.art-08dbf660d3e94240bb01d0805423903d |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-03-10T23:02:02Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-08dbf660d3e94240bb01d0805423903d2023-11-19T09:33:37ZengMDPI AGBatteries2313-01052023-09-019945210.3390/batteries9090452A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal BatteriesWenting Chen0Yikun Yi1Feng Hai2Zhendi Wu3Jingyu Guo4Xiaolu Tian5Xin Gao6Wei Tang7Mingtao Li8Shaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaShaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaShaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaShaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaShaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaShaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaShaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaShaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaShaanxi Key Laboratory of Energy Chemical Process Intensification, School of Chemical Engineering and Technology, Xi’an Jiaotong University, No. 28, Xianning West Road, Xi’an 710049, ChinaIonic 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 high energy density and safety at the same time. In this paper, a flexible and self-healing ionic gel electrolyte was prepared using a 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 remarkable self-healing ability. An ionic conductivity of 9.06 × 10<sup>−4</sup> S cm<sup>−1</sup> at room temperature was achieved. Moreover, the lithium-ion transference number was increased to 0.312. The ionic gel electrolyte has a self-healing function which guarantees long-term tolerance during charging and discharging. The capacity retention rate of the Li//LiFePO<sub>4</sub> battery was 96% after 155 cycles at 0.1 C at 60 °C. 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 gave rise to a good rate performance.https://www.mdpi.com/2313-0105/9/9/452flexible electrolyteflame-retardantself-healinggel electrolytelithium metal batteries |
| spellingShingle | Wenting Chen Yikun Yi Feng Hai Zhendi Wu Jingyu Guo Xiaolu Tian Xin Gao Wei Tang Mingtao Li A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries Batteries flexible electrolyte flame-retardant self-healing gel electrolyte lithium metal batteries |
| title | A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries |
| title_full | A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries |
| title_fullStr | A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries |
| title_full_unstemmed | A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries |
| title_short | A Flexible and Self-Healing Ionic Gel Electrolyte Based on a Zwitterion (ZI) Copolymer for High-Performance Lithium Metal Batteries |
| title_sort | flexible and self healing ionic gel electrolyte based on a zwitterion zi copolymer for high performance lithium metal batteries |
| topic | flexible electrolyte flame-retardant self-healing gel electrolyte lithium metal batteries |
| url | https://www.mdpi.com/2313-0105/9/9/452 |
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