Stable interfaces constructed by concentrated ether electrolytes to render robust lithium metal batteries
| Autor: | Peng Shi, Jia-Qi Huang, Tao Li, He Liu, Xiangqun Xu, Rui Xu, Xin-Bing Cheng, Xue-Qiang Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Materials science General Chemical Engineering General Chemistry Electrolyte engineering.material Biochemistry Energy storage Cathode Anode law.invention Metal Coating Chemical engineering law visual_art Electrode visual_art.visual_art_medium engineering Electrical conductor |
| Zdroj: | Chinese Journal of Chemical Engineering. 37:152-158 |
| ISSN: | 1004-9541 |
| DOI: | 10.1016/j.cjche.2021.03.021 |
| Popis: | Lithium metal batteries (LMBs) are highly considered as promising candidates for next-generation energy storage systems. However, routine electrolytes cannot tolerate the high potential at cathodes and low potential at anodes simultaneously, leading to severe interfacial reactions. Herein, a highly concentrated electrolyte (HCE) region trapped in porous carbon coating layer is adopted to form a stable and highly conductive solid electrolyte interphase (SEI) on Li metal surface. The protected Li metal anode can potentially match the high-voltage cathode in ester electrolytes. Synergistically, this ingenious design promises high-voltage-resistant interfaces at cathodes and stable SEI with abundance of inorganic components at anodes simultaneously in high-voltage LMBs. The feasibility of this interface-regulation strategy is demonstrated in Li | LiFePO4 batteries, realizing a lifespan twice as long as the routine cells, with a huge capacity retention enhancement from 46.4% to 88.7% after 100 cycles. This contribution proof-of-concepts the emerging principles on the formation and regulation of stable electrode/electrolyte interfaces in the cathode and anode simultaneously towards the next-generation high-energy–density batteries. |
| Databáze: | OpenAIRE |
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