Abstract

Although the mechanism of lithium dendritic growth is still under discussion, several researchers have reported that insufficient mass transfer causes dendrite formation. Recently, the synthesis of a single lithium molten salt, lithium (fluorosulfonyl)(trifluoromethylsulfonyl)amide (Li[FTA], m.p. 100°C), was reported, which can be used with a lithium electrode (m.p. 180°C). In this study, we focused on lithium electrodeposition from Li[FTA], where the lithium-ion concentration is constant at any time and location, even during electrodeposition, such that the mass transfer is always sufficient. Consequently, the formation of needle-like dendrites was suppressed using this single lithium molten salt. Thus, results imply that using a molten salt, such as Li[FTA], is a potential solution for the dendrite problem.

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