Modified Polyethylene Oxide Solid-State Electrolytes with Poly(vinylidene fluoride-hexafluoropropylene)
Lithium-ion batteries are restricted in development due to safety issues such as poor chemical stability and flammability of organic liquid electrolytes. Replacing liquid electrolytes with solid ones is crucial for improving battery safety and performance. This study aims to enhance the performance...
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MDPI AG
2025-05-01
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| author | Jinwei Yan Wen Huang Tangqi Hu Hai Huang Chengwei Zhu Zhijie Chen Xiaohong Fan Qihui Wu Yi Li |
| author_facet | Jinwei Yan Wen Huang Tangqi Hu Hai Huang Chengwei Zhu Zhijie Chen Xiaohong Fan Qihui Wu Yi Li |
| author_sort | Jinwei Yan |
| collection | DOAJ |
| description | Lithium-ion batteries are restricted in development due to safety issues such as poor chemical stability and flammability of organic liquid electrolytes. Replacing liquid electrolytes with solid ones is crucial for improving battery safety and performance. This study aims to enhance the performance of polyethylene oxide (PEO)-based polymer via blending with poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)). The experimental results showed that the addition of P(VDF-HFP) disrupted the crystalline regions of PEO by increasing the amorphous domains, thus improving lithium-ion migration capability. The electrolyte membrane with 30 wt% P(VDF-HFP) and 70 wt% PEO exhibited the highest ionic conductivity, widest electrochemical window, and enhanced thermal stability, as well as a high lithium-ion transference number (0.45). The cells assembled with this membrane electrolyte demonstrated an excellent rate of performance and cycling stability, retaining specific capacities of 122.39 mAh g<sup>−1</sup> after 200 cycles at 0.5C, and 112.77 mAh g<sup>−1</sup> after 200 cycles at 1C and 25 °C. The full cell assembled with LiFePO<sub>4</sub> as the positive electrode exhibits excellent rate performance and good cycling stability, indicating that prepared solid electrolytes have great potential applications in lithium batteries. |
| format | Article |
| id | doaj-art-503dfa3e53db4c698418f1bbcf662174 |
| institution | DOAJ |
| issn | 1420-3049 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj-art-503dfa3e53db4c698418f1bbcf6621742025-08-20T03:11:19ZengMDPI AGMolecules1420-30492025-05-013011242210.3390/molecules30112422Modified Polyethylene Oxide Solid-State Electrolytes with Poly(vinylidene fluoride-hexafluoropropylene)Jinwei Yan0Wen Huang1Tangqi Hu2Hai Huang3Chengwei Zhu4Zhijie Chen5Xiaohong Fan6Qihui Wu7Yi Li8Xiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Key Laboratory of Energy Cleaning Utilization, Development, College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, ChinaJiangsu Key Laboratory of Advanced Functional Polymer Materials, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, ChinaJiangsu Key Laboratory of Advanced Functional Polymer Materials, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, ChinaXiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Key Laboratory of Energy Cleaning Utilization, Development, College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, ChinaXiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Key Laboratory of Energy Cleaning Utilization, Development, College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, ChinaXiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Key Laboratory of Energy Cleaning Utilization, Development, College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, ChinaXiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Key Laboratory of Energy Cleaning Utilization, Development, College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, ChinaXiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Key Laboratory of Energy Cleaning Utilization, Development, College of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, ChinaJiangsu Key Laboratory of Advanced Functional Polymer Materials, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, ChinaLithium-ion batteries are restricted in development due to safety issues such as poor chemical stability and flammability of organic liquid electrolytes. Replacing liquid electrolytes with solid ones is crucial for improving battery safety and performance. This study aims to enhance the performance of polyethylene oxide (PEO)-based polymer via blending with poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)). The experimental results showed that the addition of P(VDF-HFP) disrupted the crystalline regions of PEO by increasing the amorphous domains, thus improving lithium-ion migration capability. The electrolyte membrane with 30 wt% P(VDF-HFP) and 70 wt% PEO exhibited the highest ionic conductivity, widest electrochemical window, and enhanced thermal stability, as well as a high lithium-ion transference number (0.45). The cells assembled with this membrane electrolyte demonstrated an excellent rate of performance and cycling stability, retaining specific capacities of 122.39 mAh g<sup>−1</sup> after 200 cycles at 0.5C, and 112.77 mAh g<sup>−1</sup> after 200 cycles at 1C and 25 °C. The full cell assembled with LiFePO<sub>4</sub> as the positive electrode exhibits excellent rate performance and good cycling stability, indicating that prepared solid electrolytes have great potential applications in lithium batteries.https://www.mdpi.com/1420-3049/30/11/2422PEOP(VDF-HFP)solid-state electrolytelithium-ion batteries |
| spellingShingle | Jinwei Yan Wen Huang Tangqi Hu Hai Huang Chengwei Zhu Zhijie Chen Xiaohong Fan Qihui Wu Yi Li Modified Polyethylene Oxide Solid-State Electrolytes with Poly(vinylidene fluoride-hexafluoropropylene) Molecules PEO P(VDF-HFP) solid-state electrolyte lithium-ion batteries |
| title | Modified Polyethylene Oxide Solid-State Electrolytes with Poly(vinylidene fluoride-hexafluoropropylene) |
| title_full | Modified Polyethylene Oxide Solid-State Electrolytes with Poly(vinylidene fluoride-hexafluoropropylene) |
| title_fullStr | Modified Polyethylene Oxide Solid-State Electrolytes with Poly(vinylidene fluoride-hexafluoropropylene) |
| title_full_unstemmed | Modified Polyethylene Oxide Solid-State Electrolytes with Poly(vinylidene fluoride-hexafluoropropylene) |
| title_short | Modified Polyethylene Oxide Solid-State Electrolytes with Poly(vinylidene fluoride-hexafluoropropylene) |
| title_sort | modified polyethylene oxide solid state electrolytes with poly vinylidene fluoride hexafluoropropylene |
| topic | PEO P(VDF-HFP) solid-state electrolyte lithium-ion batteries |
| url | https://www.mdpi.com/1420-3049/30/11/2422 |
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