Abstract

Magnesium secondary batteries are expected to be one of the popular post-lithium ion batteries due to their high capacity and the bountiful resources of this element. Reversible plating by the reduction of Mg2+ and stripping by the oxidation of Mg metal are critical problems for this battery. In this study, we attempted to investigate the dependence of the Mg plating/stripping behavior on the anion species. Various Mg salts containing perfluoro anions were synthesized and their thermal stabilities were measured by thermogravimetry. For the Mg salts possessing a high thermal stability, Mg molten salt electrolytes were developed with potassium or cesium salts having common anions and their plating/stripping behaviors were investigated.

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