Effects of Dimethoxyethane as a Co-Solvent on Electrochemical Formation of a Surface Film on Graphite in an Ethylene Carbonate-Based Solution

Abstract:

The electrochemical processes occurring at the surface of a highly ordered pyrolytic graphite electrode were investigated, to understand the effects of dimethoxyethane as a co-solvent on the formation of a surface film. In-situ electrochemical atomic force microscopy revealed that a thin film of ~5 nm thickness was formed on the graphite surface after the first potential cycling. There was no evidence of co-intercalation of the solvent molecules. The cyclic voltammetry analysis revealed that a irreversible reduction peak closely related to the film formation was present at ~1.7 V vs. Li⁺/Li.

• Periodical: Key Engineering Materials (Volume 705)
• Pages: 133-137
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.705.133
• Online since: August 2016
• Authors: Soon Ki Jeong*
• Keywords: AFM, Graphite, Lithium-Ion Battery, Surface Film

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DOI: 10.1016/s0378-7753(96)02555-4