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Solvation Rule for Solid‐Electrolyte Interphase Enabler in Lithium‐Metal Batteries

Journal Article · · Angewandte Chemie
 [1];  [1];  [2];  [3];  [4];  [5]
  1. Chemical Sciences and Engineering Division Argonne National Laboratory 9700 S. Cass Avenue Lemont IL 60439 USA
  2. Chemical Sciences and Engineering Division Argonne National Laboratory 9700 S. Cass Avenue Lemont IL 60439 USA, Department of Chemical and Environmental Engineering University of California-Riverside Riverside CA 92521 USA
  3. Materials Science Division Argonne National Laboratory 9700 S. Cass Avenue Lemont IL 60439 USA
  4. Program of Materials Science and Engineering University of California-Riverside Riverside CA 92521 USA
  5. Chemical Sciences and Engineering Division Argonne National Laboratory 9700 S. Cass Avenue Lemont IL 60439 USA, Material Science and Engineering Stanford University Stanford CA 94305 USA, IRMC, Imam Abdulrahman Bin Faisal University (IAU) Dammam 34212 Saudi Arabia
Abstract

Despite the exceptionally high energy density of lithium metal anodes, the practical application of lithium‐metal batteries (LMBs) is still impeded by the instability of the interphase between the lithium metal and the electrolyte. To formulate a functional electrolyte system that can stabilize the lithium‐metal anode, the solvation behavior of the solvent molecules must be understood because the electrochemical properties of a solvent can be heavily influenced by its solvation status. We unambiguously demonstrated the solvation rule for the solid‐electrolyte interphase (SEI) enabler in an electrolyte system. In this study, fluoroethylene carbonate was used as the SEI enabler due to its ability to form a robust SEI on the lithium metal surface, allowing relatively stable LMB cycling. The results revealed that the solvation number of fluoroethylene carbonate must be ≥1 to ensure the formation of a stable SEI in which the sacrificial reduction of the SEI enabler subsequently leads to the stable cycling of LMBs.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NONE; AC02-06CH11357
OSTI ID:
1647407
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 41 Vol. 132; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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