Mg-based batteries are attractive energy storage devices that have the potential to disrupt the state-of-the-art Li-ion battery technologies. However, suitable electrolytes for such applications are facing significant challenges. Electrolytes for Mg batteries must facilitate facile Mg deposition-stripping and be resistant to electrochemical oxidation to provide wide electrochemical windows. Moreover, to be compatible with electrophilic electrodes, such as sulfur, the electrolytes must also be non-nucleophilic. To develop the suitable Mg-ion electrolytes, we investigated the properties of electrolytes from single simple Mg salt such as Mg carborane, Mg bis(trifluoromethanesulfonyl)imide, and Mg hexafluorophosphate. The formation and composition of the solid-electrolyte interphase from Mg deposition-stripping of these electrolytes were studied. In addition to the electrolytes, the Mg intercalation reaction of transition metal sulfides and Mg-sulfur conversion reaction were also investigated in this study.

Rechargeable magnesium battery systems: Electrolytes from simple Mg salts and sulfur-based cathodes

255th National Meeting (2018)

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