Structural Battery Electrolytes Based on a Cross‐Linked Methacrylate Polymer and a Protic Ionic Liquid: Is There an Optimal Composition?
Within the development of structural batteries, finding the optimal electrolyte composition, that is, one that offers both high ionic conductivity and mechanical stiffness, is essential. Structural batteries are multifunctional composites able to store electrical energy within load‐bearing elements...
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| Language: | English |
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Wiley-VCH
2025-05-01
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| Series: | Advanced Energy & Sustainability Research |
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| Online Access: | https://doi.org/10.1002/aesr.202500013 |
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| author | Nicole Abdou Achilleas Pipertzis Richa Chaudhary Lars Evenäs Johanna Xu Leif E. Asp Jan Swenson Anna Martinelli |
| author_facet | Nicole Abdou Achilleas Pipertzis Richa Chaudhary Lars Evenäs Johanna Xu Leif E. Asp Jan Swenson Anna Martinelli |
| author_sort | Nicole Abdou |
| collection | DOAJ |
| description | Within the development of structural batteries, finding the optimal electrolyte composition, that is, one that offers both high ionic conductivity and mechanical stiffness, is essential. Structural batteries are multifunctional composites able to store electrical energy within load‐bearing elements of devices. Their use results in a significant mass reduction, thereby improving fuel efficiency and enabling a shift to sustainable energy. In this work, structural battery electrolytes consisting of a methacrylate‐based polymer, 1‐ethylimidazolium bis(trifluoromethylsulfonyl)imide protic ionic liquid, and a lithium salt are investigated. Interestingly, the transport properties of the confined liquid electrolyte seem primarily limited by the percolation of the polymer network. Furthermore, upon confinement, a decrease in the glass transition temperature of the polymer phase and weaker intermolecular interactions are observed, which correlate to faster local dynamics. The self‐diffusivity of the Li ions keeps high with respect to the other diffusing ions and tends to decouple from the anions upon increased temperature. The composite sample with 50 wt% of liquid electrolyte shows an ionic conductivity of ≈0.1 mS cm−1 with a shear storage modulus of ≈150 MPa and was thus selected for proof‐of‐concept tests by electrochemical methods. Overall, this comprehensive study highlights the versatility of these biphasic systems for various applications. |
| format | Article |
| id | doaj-art-49f3c13ba59e46b6ba38775f83796d77 |
| institution | DOAJ |
| issn | 2699-9412 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Energy & Sustainability Research |
| spelling | doaj-art-49f3c13ba59e46b6ba38775f83796d772025-08-20T03:11:22ZengWiley-VCHAdvanced Energy & Sustainability Research2699-94122025-05-0165n/an/a10.1002/aesr.202500013Structural Battery Electrolytes Based on a Cross‐Linked Methacrylate Polymer and a Protic Ionic Liquid: Is There an Optimal Composition?Nicole Abdou0Achilleas Pipertzis1Richa Chaudhary2Lars Evenäs3Johanna Xu4Leif E. Asp5Jan Swenson6Anna Martinelli7Department of Chemistry and Chemical Engineering Chalmers University of Technology 41296 Gothenburg SwedenDepartment of Physics Chalmers University of Technology 41296 Gothenburg SwedenDepartment of Industrial and Materials Science Wallenberg Initiative Material Science for Sustainability Chalmers University of Technology 41258 Gothenburg SwedenDepartment of Chemistry and Chemical Engineering Chalmers University of Technology 41296 Gothenburg SwedenDepartment of Industrial and Materials Science Chalmers University of Technology 41258 Gothenburg SwedenDepartment of Industrial and Materials Science Wallenberg Initiative Material Science for Sustainability Chalmers University of Technology 41258 Gothenburg SwedenDepartment of Physics Chalmers University of Technology 41296 Gothenburg SwedenDepartment of Chemistry and Chemical Engineering Chalmers University of Technology 41296 Gothenburg SwedenWithin the development of structural batteries, finding the optimal electrolyte composition, that is, one that offers both high ionic conductivity and mechanical stiffness, is essential. Structural batteries are multifunctional composites able to store electrical energy within load‐bearing elements of devices. Their use results in a significant mass reduction, thereby improving fuel efficiency and enabling a shift to sustainable energy. In this work, structural battery electrolytes consisting of a methacrylate‐based polymer, 1‐ethylimidazolium bis(trifluoromethylsulfonyl)imide protic ionic liquid, and a lithium salt are investigated. Interestingly, the transport properties of the confined liquid electrolyte seem primarily limited by the percolation of the polymer network. Furthermore, upon confinement, a decrease in the glass transition temperature of the polymer phase and weaker intermolecular interactions are observed, which correlate to faster local dynamics. The self‐diffusivity of the Li ions keeps high with respect to the other diffusing ions and tends to decouple from the anions upon increased temperature. The composite sample with 50 wt% of liquid electrolyte shows an ionic conductivity of ≈0.1 mS cm−1 with a shear storage modulus of ≈150 MPa and was thus selected for proof‐of‐concept tests by electrochemical methods. Overall, this comprehensive study highlights the versatility of these biphasic systems for various applications.https://doi.org/10.1002/aesr.202500013cross‐linked polymersenergy materialsLi ionmechanical propertiesprotic ionic liquidsthermal properties |
| spellingShingle | Nicole Abdou Achilleas Pipertzis Richa Chaudhary Lars Evenäs Johanna Xu Leif E. Asp Jan Swenson Anna Martinelli Structural Battery Electrolytes Based on a Cross‐Linked Methacrylate Polymer and a Protic Ionic Liquid: Is There an Optimal Composition? Advanced Energy & Sustainability Research cross‐linked polymers energy materials Li ion mechanical properties protic ionic liquids thermal properties |
| title | Structural Battery Electrolytes Based on a Cross‐Linked Methacrylate Polymer and a Protic Ionic Liquid: Is There an Optimal Composition? |
| title_full | Structural Battery Electrolytes Based on a Cross‐Linked Methacrylate Polymer and a Protic Ionic Liquid: Is There an Optimal Composition? |
| title_fullStr | Structural Battery Electrolytes Based on a Cross‐Linked Methacrylate Polymer and a Protic Ionic Liquid: Is There an Optimal Composition? |
| title_full_unstemmed | Structural Battery Electrolytes Based on a Cross‐Linked Methacrylate Polymer and a Protic Ionic Liquid: Is There an Optimal Composition? |
| title_short | Structural Battery Electrolytes Based on a Cross‐Linked Methacrylate Polymer and a Protic Ionic Liquid: Is There an Optimal Composition? |
| title_sort | structural battery electrolytes based on a cross linked methacrylate polymer and a protic ionic liquid is there an optimal composition |
| topic | cross‐linked polymers energy materials Li ion mechanical properties protic ionic liquids thermal properties |
| url | https://doi.org/10.1002/aesr.202500013 |
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