Preparation of porous, chemically cross-linked, PVdF-based gel polymer electrolytes for rechargeable lithium batteries
| Autor: | Y.Y. Wang, C.C. Wan, Chia-Liang Cheng |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
chemistry.chemical_classification
Materials science Renewable Energy Sustainability and the Environment technology industry and agriculture Energy Engineering and Power Technology chemistry.chemical_element Polyethylene glycol Electrolyte Polymer Lithium battery chemistry.chemical_compound chemistry Chemical engineering Polymerization Polymer chemistry Ionic conductivity Lithium Electrical and Electronic Engineering Physical and Theoretical Chemistry Ethylene glycol |
| Zdroj: | Journal of Power Sources. 134:202-210 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2004.03.037 |
| Popis: | This study reports the development of a new system of porous, chemically cross-linked, gel polymer electrolytes based on poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF–HFP) copolymer as a polymer matrix, polyethylene glycol (PEG) as a plasticizer, and polyethylene glycol dimethacrylate (PEGDMA) as a chemical cross-linking oligomer. The electrolytes are prepared by a combination of controlled evaporation and thermal polymerization of PEGDMA. PVdF–HFP/PEG/PEGDMA gel polymer electrolytes with a composition of 5/3/2 exhibit both high ambient ionic conductivity, viz., >1 mS cm−1, and a high tensile modulus of 52 MPa, because of their porous and network structures. All the blends of electrolytes are electrochemically stable up to 5 V versus Li/Li+ in the presence of 1 M LiPF6/ethylene carbonate–diethyl carbonate (EC–DEC). With these polymer electrolytes, rechargeable lithium batteries composed of carbon anode and LiCoO2 cathode have acceptable cycleability and a good rate capability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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