Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode Integration
Solid polymer electrolytes (SPEs) have attracted much attention due to their excellent flexibility, strong interfacial adhesion, and good processibility. However, the poor interfacial contact between the separate solid polymer electrolytes and electrodes leads to large interfacial impedance and, thu...
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MDPI AG
2025-01-01
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| Series: | Molecules |
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| author | Zehua Chen Mianrui Li Shengguang Qi Li Du |
| author_facet | Zehua Chen Mianrui Li Shengguang Qi Li Du |
| author_sort | Zehua Chen |
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| description | Solid polymer electrolytes (SPEs) have attracted much attention due to their excellent flexibility, strong interfacial adhesion, and good processibility. However, the poor interfacial contact between the separate solid polymer electrolytes and electrodes leads to large interfacial impedance and, thus, hinders Li transport. In this work, an ionic liquid-modified comb-like crosslinked network composite solid-state electrolyte with an integrated electrolyte/cathode structure is prepared by in situ ultraviolet (UV) photopolymerization. Combining the enhanced interfacial contact and the introduction of ionic liquid, a continuous and fast Li<sup>+</sup> transport channel at the electrolyte–cathode interface is established, ultimately enhancing the overall performance of solid-state lithium batteries. The composite solid electrolytes (CSEs) exhibit an ionic conductivity of 0.44 mS cm<sup>−1</sup> at 60 °C. LiFePO<sub>4</sub>//Li cells deliver a high discharge capacity (154 mAh g<sup>−1</sup> at 0.5 C) and cycling stability (with a retention rate of more than 80% at 0.5 C after 200 cycles) at 60 °C. |
| format | Article |
| id | doaj-art-613d6f568f824a3691be1f41d5131578 |
| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2025-01-01 |
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| series | Molecules |
| spelling | doaj-art-613d6f568f824a3691be1f41d51315782025-01-24T13:43:54ZengMDPI AGMolecules1420-30492025-01-0130239510.3390/molecules30020395Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode IntegrationZehua Chen0Mianrui Li1Shengguang Qi2Li Du3Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, ChinaGuangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, ChinaGuangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, ChinaGuangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, ChinaSolid polymer electrolytes (SPEs) have attracted much attention due to their excellent flexibility, strong interfacial adhesion, and good processibility. However, the poor interfacial contact between the separate solid polymer electrolytes and electrodes leads to large interfacial impedance and, thus, hinders Li transport. In this work, an ionic liquid-modified comb-like crosslinked network composite solid-state electrolyte with an integrated electrolyte/cathode structure is prepared by in situ ultraviolet (UV) photopolymerization. Combining the enhanced interfacial contact and the introduction of ionic liquid, a continuous and fast Li<sup>+</sup> transport channel at the electrolyte–cathode interface is established, ultimately enhancing the overall performance of solid-state lithium batteries. The composite solid electrolytes (CSEs) exhibit an ionic conductivity of 0.44 mS cm<sup>−1</sup> at 60 °C. LiFePO<sub>4</sub>//Li cells deliver a high discharge capacity (154 mAh g<sup>−1</sup> at 0.5 C) and cycling stability (with a retention rate of more than 80% at 0.5 C after 200 cycles) at 60 °C.https://www.mdpi.com/1420-3049/30/2/395integrated electrolyte/cathode structurein situ UV photopolymerizationcomposite solid electrolytelithium metal batteriesionic liquid |
| spellingShingle | Zehua Chen Mianrui Li Shengguang Qi Li Du Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode Integration Molecules integrated electrolyte/cathode structure in situ UV photopolymerization composite solid electrolyte lithium metal batteries ionic liquid |
| title | Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode Integration |
| title_full | Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode Integration |
| title_fullStr | Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode Integration |
| title_full_unstemmed | Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode Integration |
| title_short | Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode Integration |
| title_sort | enhanced interfacial contact and lithium ion transport in ionic liquid polymer electrolyte via in situ electrolyte cathode integration |
| topic | integrated electrolyte/cathode structure in situ UV photopolymerization composite solid electrolyte lithium metal batteries ionic liquid |
| url | https://www.mdpi.com/1420-3049/30/2/395 |
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