In-situ generation of high performance thiol-conjugated solid polymer electrolytes via reliable thiol-acrylate click chemistry
| Autor: | Jiyan Liu, Qingliang You, Yanqing Wang, Xueqing Liu, Shuyu Gao, Qingzhong Guo, Rui Xu, Kun Yang, Zhihong Liu, Ce Xuan, Shaokai Cheng |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Renewable Energy Sustainability and the Environment Ethylene glycol dimethacrylate Energy Engineering and Power Technology Dithiol 02 engineering and technology Electrolyte Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid chemistry.chemical_compound Chemical engineering chemistry Molar mass distribution Ionic conductivity Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Glass transition |
| Zdroj: | Journal of Power Sources. 456:228024 |
| ISSN: | 0378-7753 |
| Popis: | A kind of high performance thiol-conjugated solid polymer electrolytes is in situ generated via a facile thiol-acrylate Michael addition reaction between ethylene glycol dimethacrylate (EGDMA) and 3,6-dioxa-1,8-octane dithiol (DODT) without UV irradiation or thermal initiation. The resulting amorphous linear polymer P(EGDMA-DODT) has a high average molecular weight of 47,000 Da with a low glass transition temperature of −50 °C. The in-situ generated P(EGDMA-DODT) solid polymer electrolyte exhibits room temperature ionic conductivity up to 2.7 × 10 −5 S cm−1 with a high lithium ion transference number above 0.40 and electrochemical stability window up to 4.3 V vs. Li/Li+. Advantages of longer C–S bond length (1.81 A), lower electronegativity (2.58) and moderate coordination facilitate the segment motion and contribute to higher room temperature ionic conductivity. It is demonstrated that the all-solid-state LiFePO4/Li cells using the in-situ generated P(EGDMA-DODT) electrolytes delivers considerable specific capacities, rate capability and excellent cyclic performance at room temperature. These results demonstrate that this thiol-acrylate click chemistry without UV irradiation or thermal initiation is a facile and intriguing strategy for in-situ preparing high performance solid polymer electrolytes. |
| Databáze: | OpenAIRE |
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