Taming Solvent-Solute Interaction Accelerates Interfacial Kinetics in Low-Temperature Lithium-Metal Batteries
© 2022 Wiley-VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 3 vom: 05. Jan., Seite e2208340 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2023
|
| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article Li-metal batteries interfacial kinetics low-temperature electrolytes solvent-solute interaction |
| Zusammenfassung: | © 2022 Wiley-VCH GmbH. Lithium (Li)-metal batteries promise energy density beyond 400 Wh kg-1 , while their practical operation at an extreme temperature below -30 °C suffers severe capacity deterioration. Such battery failure highly relates to the remarkably increased kinetic barrier of interfacial processes, including interfacial desolvation, ion transportation, and charge transfer. In this work, the interfacial kinetics in three prototypical electrolytes are quantitatively probed by three-electrode electrochemical techniques and molecular dynamics simulations. Desolvation as the limiting step of interfacial processes is validated to dominate the cell impedance and capacity at low temperature. 1,3-Dioxolane-based electrolyte with tamed solvent-solute interaction facilitates fast desolvation, enabling the practical Li|LiNi0.5 Co0.2 Mn0.3 O2 cells at -40 °C to retain 66% of room-temperature capacity and withstand remarkably fast charging rate (0.3 C). The barrier of desolvation dictated by solvent-solute interaction environments is quantitatively uncovered. Regulating the solvent-solute interaction by low-affinity solvents emerges as a promising solution to low-temperature batteries |
|---|---|
| Beschreibung: | Date Completed 20.01.2023 Date Revised 20.01.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202208340 |