Preparation and Study of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)-Based Composite Solid Electrolytes
Solid-state electrolytes are widely anticipated to revitalize lithium-ion batteries with high energy density and safety. However, low ionic conductivity and high interfacial resistance at room temperature pose challenges for practical applications. This study combines the rigid oxide electrolyte LLZ...
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MDPI AG
2024-11-01
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| Online Access: | https://www.mdpi.com/2073-4352/14/11/982 |
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| author | Meihong Huang Lingxiao Lan Pengcheng Shen Zhiyong Liang Feng Wang Yuling Zhong Chaoqun Wu Fanxiao Kong Qicheng Hu |
| author_facet | Meihong Huang Lingxiao Lan Pengcheng Shen Zhiyong Liang Feng Wang Yuling Zhong Chaoqun Wu Fanxiao Kong Qicheng Hu |
| author_sort | Meihong Huang |
| collection | DOAJ |
| description | Solid-state electrolytes are widely anticipated to revitalize lithium-ion batteries with high energy density and safety. However, low ionic conductivity and high interfacial resistance at room temperature pose challenges for practical applications. This study combines the rigid oxide electrolyte LLZTO with the flexible polymer electrolyte poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) to achieve effective coupling of rigidity and flexibility. The semi-interpenetrating network structure endows the PEL composite solid electrolyte with excellent lithium-ion transport capabilities, resulting in an ionic conductivity of up to 5.1 × 10<sup>−4</sup> S cm<sup>−1</sup> and lithium-ion transference number of 0.41. The assembled LiFePO<sub>4</sub>/PEL/Li solid-state battery demonstrates an initial discharge capacity of 132 mAh g<sup>−1</sup> at a rate of 0.1 C. After 100 charge–discharge cycles, the capacity retention is 81%. This research provides a promising strategy for preparing composite solid electrolytes in solid-state lithium-ion batteries. |
| format | Article |
| id | doaj-art-cf4db7c53a2a45ec87dfb56141ce3280 |
| institution | OA Journals |
| issn | 2073-4352 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj-art-cf4db7c53a2a45ec87dfb56141ce32802025-08-20T02:08:03ZengMDPI AGCrystals2073-43522024-11-01141198210.3390/cryst14110982Preparation and Study of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)-Based Composite Solid ElectrolytesMeihong Huang0Lingxiao Lan1Pengcheng Shen2Zhiyong Liang3Feng Wang4Yuling Zhong5Chaoqun Wu6Fanxiao Kong7Qicheng Hu8School of Automotive Engineering, Guangdong Polytechnic of Industry and Commerce, Guangzhou 510510, ChinaGuangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, ChinaGuangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, ChinaSchool of Automotive Engineering, Guangdong Polytechnic of Industry and Commerce, Guangzhou 510510, ChinaSchool of Automotive Engineering, Guangdong Polytechnic of Industry and Commerce, Guangzhou 510510, ChinaSchool of Automotive Engineering, Guangdong Polytechnic of Industry and Commerce, Guangzhou 510510, ChinaCenter for Industrial Analysis and Testing, Guangdong Academy of Sciences, Guangzhou 510650, ChinaKey Laboratory of Metal 3D Printing Technology, Liuzhou Polytechnic University, Liuzhou 545616, ChinaGuangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, ChinaSolid-state electrolytes are widely anticipated to revitalize lithium-ion batteries with high energy density and safety. However, low ionic conductivity and high interfacial resistance at room temperature pose challenges for practical applications. This study combines the rigid oxide electrolyte LLZTO with the flexible polymer electrolyte poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) to achieve effective coupling of rigidity and flexibility. The semi-interpenetrating network structure endows the PEL composite solid electrolyte with excellent lithium-ion transport capabilities, resulting in an ionic conductivity of up to 5.1 × 10<sup>−4</sup> S cm<sup>−1</sup> and lithium-ion transference number of 0.41. The assembled LiFePO<sub>4</sub>/PEL/Li solid-state battery demonstrates an initial discharge capacity of 132 mAh g<sup>−1</sup> at a rate of 0.1 C. After 100 charge–discharge cycles, the capacity retention is 81%. This research provides a promising strategy for preparing composite solid electrolytes in solid-state lithium-ion batteries.https://www.mdpi.com/2073-4352/14/11/982lithium-ion batteriescomposite solid electrolytesLLZTO |
| spellingShingle | Meihong Huang Lingxiao Lan Pengcheng Shen Zhiyong Liang Feng Wang Yuling Zhong Chaoqun Wu Fanxiao Kong Qicheng Hu Preparation and Study of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)-Based Composite Solid Electrolytes Crystals lithium-ion batteries composite solid electrolytes LLZTO |
| title | Preparation and Study of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)-Based Composite Solid Electrolytes |
| title_full | Preparation and Study of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)-Based Composite Solid Electrolytes |
| title_fullStr | Preparation and Study of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)-Based Composite Solid Electrolytes |
| title_full_unstemmed | Preparation and Study of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)-Based Composite Solid Electrolytes |
| title_short | Preparation and Study of Poly(Vinylidene Fluoride-Co-Hexafluoropropylene)-Based Composite Solid Electrolytes |
| title_sort | preparation and study of poly vinylidene fluoride co hexafluoropropylene based composite solid electrolytes |
| topic | lithium-ion batteries composite solid electrolytes LLZTO |
| url | https://www.mdpi.com/2073-4352/14/11/982 |
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