Synthetic poly-dioxolane as universal solid electrolyte interphase for stable lithium metal anodes
| Autor: | Jing Wan, Haiping Wu, Lin Sun, Yucheng Zhang, Chao Wang, Mengxue Li, Rui Wen, Lili Chen, Tao Chen, Yuncong Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Electrolyte engineering.material 010402 general chemistry 01 natural sciences law.invention Metal Coating law Electrochemistry Dissolution 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Anode Fuel Technology chemistry Chemical engineering visual_art visual_art.visual_art_medium engineering Lithium 0210 nano-technology Faraday efficiency Energy (miscellaneous) |
| Zdroj: | Journal of Energy Chemistry. 62:172-178 |
| ISSN: | 2095-4956 |
| Popis: | Lithium (Li) metal is a promising anode for the next generation high-energy–density batteries. However, the growth of Li dendrites, low coulombic efficiency and dramatic volume change limit its development. Here, we report a new synthetic poly-dioxolane (PDOL) approach to constructing an artificial 'elastic' SEI to stabilize the Li/electrolyte interface and the Li deposition/dissolution behavior in a variety of electrolytes. By coating PDOL with optimized molecular weights and synthetic routes on Li metal anode, the 'elastic' SEI layer could be maintained on top of the Li metal anode to accommodate the Li deposition/dissolution. No dendrite formation was observed during the cycling process, and the interfacial side reactions were reduced significantly. Consequently, we successfully achieved 330 cycles with a CE of 98.4% in ether electrolytes and 90 cycles with a CE of 94.3% in carbonate electrolytes. Simultaneously, the Li-metal batteries with LiFePO4 as cathodes also exhibited improved cycling performance. This strategy could promote the development of dendrite-free metal anodes toward high-performance Li-metal batteries. |
| Databáze: | OpenAIRE |
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