CO2 -Induced Melting and Solvation Reconfiguration of Phase-Change Electrolyte
© 2022 Wiley-VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 34(2022), 28 vom: 02. Juli, Seite e2202869 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2022
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| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article CO2 phase-change electrolytes solvation structure |
| Zusammenfassung: | © 2022 Wiley-VCH GmbH. Phase-change materials (PCMs) are a unique and exciting class of materials with bright prospects in wide-ranging sustainable technologies such as thermal and electrochemical energy storage. While impressive, the effect of gaseous species on PCMs remains largely unexplored hitherto. Here, a gaseous co-solvent is reported that can facilitate melting and modulate physical properties such as viscosity and ion conduction of PCMs. Especially for the appealing application of PCMs as electrolytes, gaseous species also have a critical influence on both Li+ -electrolyte structure and resultant solid electrolyte interphase (SEI). Specifically, theoretical simulations and experimental analysis evidence that CO2 can promote melting while reconfiguring the solvation structure of a succinonitrile (SCL)-derived Li+ phase-change electrolyte (Li+ -PCE) model system. Due to the enhanced interaction between Li+ cations and bis(trifluoromethanesulfonyl)imide (TFSI- ) anions in the reconfigured solvation structure, more TFSI- -derived F-rich component and extra CO2 -derived Li2 CO3 form in the upgraded SEI layer, thereby endowing proof-of-concept Li-metal batteries with prolonged cyclability. These findings may stimulate widespread interest in gas leverage to innovate electrolyte chemistry |
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| Beschreibung: | Date Revised 14.07.2022 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202202869 |