Lithium-salt-free polyoxovanadates/cellulose acetate-poly(ethylene glycol) nanocomposite solid electrolytes with enhanced electrochemical properties
Abstract Solid polymer electrolytes (SPEs) have been regarded as one of the most encouraging choices for lithium-based cells of the future generation as they further boost battery energy density and do away with any potential safety risks associated with liquid organic electrolytes. Nevertheless, so...
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Nature Portfolio
2025-05-01
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| Online Access: | https://doi.org/10.1038/s41598-025-03169-3 |
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| author | Elmira Kohan Roushan Khoshnavazi Mir Ghasem Hosseini Abdollah Salimi Mehdi Salami-Kalajahi |
| author_facet | Elmira Kohan Roushan Khoshnavazi Mir Ghasem Hosseini Abdollah Salimi Mehdi Salami-Kalajahi |
| author_sort | Elmira Kohan |
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| description | Abstract Solid polymer electrolytes (SPEs) have been regarded as one of the most encouraging choices for lithium-based cells of the future generation as they further boost battery energy density and do away with any potential safety risks associated with liquid organic electrolytes. Nevertheless, solid electrolytes’ restricted ion conductivity hinders their hands-on applications. In this work, lithium-ion conductor SPEs based on polymer/polyoxovanadates nanocomposites are fabricated by a facile cast solution method. Polyoxovanadate Li7[V15O36(CO3)] (LVC) possesses a high diffusion coefficient which acts as lithium salt. The dual function role of polyoxovanadates in the diffusion of Li+ cations and reducing the crystallinity of polymer leads to high ion conductivity of 4.1 × 10−4 S cm−1 at room temperature. Moreover, compared to the routine CA-PEG1000-LiPF6 electrolyte, the SPE with LVC had a broader electrochemical voltage window of more than 5 V. The excellent performance as lithium salt and inorganic filler and its role in reducing the crystallinity of polymers and providing mobile cations in polymer matrix, and acceptable electrochemical properties, including considerable transference number (t +) 0.59, good stability of electrode/electrolye interface after 100 h Li plating/stripping without short-circuiting, and good specific capacity (226 mAh g−1 of LiCoO2/CA-PEG1000-LVC/Gr at 0.1 C) suggest LVC as lithium salt and also as inorganic fillers for designing new SPEs with high performance for next-generation lithium-based batteries. |
| format | Article |
| id | doaj-art-465bcf8ba1e64334ae56e4f37040fb8f |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-05-01 |
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| spelling | doaj-art-465bcf8ba1e64334ae56e4f37040fb8f2025-08-20T03:48:19ZengNature PortfolioScientific Reports2045-23222025-05-0115111710.1038/s41598-025-03169-3Lithium-salt-free polyoxovanadates/cellulose acetate-poly(ethylene glycol) nanocomposite solid electrolytes with enhanced electrochemical propertiesElmira Kohan0Roushan Khoshnavazi1Mir Ghasem Hosseini2Abdollah Salimi3Mehdi Salami-Kalajahi4Department of Chemistry, Faculty of Science, University of KurdistanDepartment of Chemistry, Faculty of Science, University of KurdistanElectrochemistry Research Laboratory, Department of Physical Chemistry, Faculty of Chemistry, University of TabrizDepartment of Chemistry, Faculty of Science, University of KurdistanFaculty of Polymer Engineering, Sahand University of TechnologyAbstract Solid polymer electrolytes (SPEs) have been regarded as one of the most encouraging choices for lithium-based cells of the future generation as they further boost battery energy density and do away with any potential safety risks associated with liquid organic electrolytes. Nevertheless, solid electrolytes’ restricted ion conductivity hinders their hands-on applications. In this work, lithium-ion conductor SPEs based on polymer/polyoxovanadates nanocomposites are fabricated by a facile cast solution method. Polyoxovanadate Li7[V15O36(CO3)] (LVC) possesses a high diffusion coefficient which acts as lithium salt. The dual function role of polyoxovanadates in the diffusion of Li+ cations and reducing the crystallinity of polymer leads to high ion conductivity of 4.1 × 10−4 S cm−1 at room temperature. Moreover, compared to the routine CA-PEG1000-LiPF6 electrolyte, the SPE with LVC had a broader electrochemical voltage window of more than 5 V. The excellent performance as lithium salt and inorganic filler and its role in reducing the crystallinity of polymers and providing mobile cations in polymer matrix, and acceptable electrochemical properties, including considerable transference number (t +) 0.59, good stability of electrode/electrolye interface after 100 h Li plating/stripping without short-circuiting, and good specific capacity (226 mAh g−1 of LiCoO2/CA-PEG1000-LVC/Gr at 0.1 C) suggest LVC as lithium salt and also as inorganic fillers for designing new SPEs with high performance for next-generation lithium-based batteries.https://doi.org/10.1038/s41598-025-03169-3Lithium-ion batteriesSolid polymer electrolytePolyoxometalatesNanocomposites |
| spellingShingle | Elmira Kohan Roushan Khoshnavazi Mir Ghasem Hosseini Abdollah Salimi Mehdi Salami-Kalajahi Lithium-salt-free polyoxovanadates/cellulose acetate-poly(ethylene glycol) nanocomposite solid electrolytes with enhanced electrochemical properties Scientific Reports Lithium-ion batteries Solid polymer electrolyte Polyoxometalates Nanocomposites |
| title | Lithium-salt-free polyoxovanadates/cellulose acetate-poly(ethylene glycol) nanocomposite solid electrolytes with enhanced electrochemical properties |
| title_full | Lithium-salt-free polyoxovanadates/cellulose acetate-poly(ethylene glycol) nanocomposite solid electrolytes with enhanced electrochemical properties |
| title_fullStr | Lithium-salt-free polyoxovanadates/cellulose acetate-poly(ethylene glycol) nanocomposite solid electrolytes with enhanced electrochemical properties |
| title_full_unstemmed | Lithium-salt-free polyoxovanadates/cellulose acetate-poly(ethylene glycol) nanocomposite solid electrolytes with enhanced electrochemical properties |
| title_short | Lithium-salt-free polyoxovanadates/cellulose acetate-poly(ethylene glycol) nanocomposite solid electrolytes with enhanced electrochemical properties |
| title_sort | lithium salt free polyoxovanadates cellulose acetate poly ethylene glycol nanocomposite solid electrolytes with enhanced electrochemical properties |
| topic | Lithium-ion batteries Solid polymer electrolyte Polyoxometalates Nanocomposites |
| url | https://doi.org/10.1038/s41598-025-03169-3 |
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