Structure and Solution Dynamics of Lithium Methyl Carbonate as a Protective Layer For Lithium Metal

Journal Article · 04 May 2018 · ACS Applied Energy Materials

DOI: https://doi.org/10.1021/acsaem.8b00348 · OSTI ID:1987404

Liu, Haodong ^[1]; Wang, Xuefeng  ^[2]; Zhou, Hongyao ^[2]; Lim, Hee-Dae ^[2]; Xing, Xing ^[2]; Yan, Qizhang ^[2]; Meng, Ying Shirley  ^[2]; Liu, Ping  ^[2]

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1. Univ. of California, San Diego, La Jolla, CA (United States); Univ. of California, San Diego, CA (United States)
2. Univ. of California, San Diego, La Jolla, CA (United States)

Herein, Lithium methyl carbonate (LMC) is synthesized in a single step and investigated as a coating material for Li protection. The LMC layer can be formed in situ during Li plating on Cu foil. The chemical and crystal structure of the ~1 μm thick coating is confirmed, which remains intact during lithium cycling. SEM also confirms the dissolution of the LMC layer after being transferred into the commercial LiPF₆-carbonate electrolyte. Presaturating the electrolyte with LMC powder prevents the dissolution of the LMC coating layer, which improves the Li plating/stripping Coulombic efficiency from 90.5% (bare Cu in commercial electrolyte) to 96.1% at 0.5 mA cm^–2 and 1 mAh cm^–2.

• Research Organization: Univ. of California, San Diego, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); National Science Foundation (NSF)
• Grant/Contract Number: EE0007764
• OSTI ID: 1987404
• Journal Information: ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 5 Vol. 1; ISSN 2574-0962
• Publisher: American Chemical Society (ACS)Copyright Statement
• Country of Publication: United States
• Language: English