Electrochemical Redox Reactions of Lithium Ion on Nickel Electrode in Propylene Carbonate-Based Solutions

Abstract:

This study investigated the effect of a co-solvent on the lithium metal negative electrode to understand the growth of dendritic lithium and the battery performance. An electrolyte was prepared by adding a dimethyl carbonate (DMC) co-solvent in a propylene carbonate (PC) solvent. Adding DMC, considerably improved the unstable and low cyclic efficiency in the PC only electrolyte was considerably improved. Scanning electron microscopy showed that the growth of dendritic lithium was affected by the quantity of DMC. The more DMC was added, the more the dendritic lithium formation was suppressed. Fourier transform infrared spectroscopy revealed that the surface component of the deposited lithium was different, depending on the quantity of DMC added. This study successfully demonstrated that DMC co-solvent could suppress dendritic lithium.

• Periodical: Materials Science Forum (Volume 900)
• Pages: 93-97
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.900.93
• Online since: July 2017
• Authors: Mun Hui Jo, Yong Ho Lee, Soon Ki Jeong*
• Keywords: Co-Solvent, Dendritic Lithium, Lithium Metal Battery, Negative Electrode, Solid Electrolyte Interphase

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