Examining Electrolyte Compatibility on Polymorphic MnO Cathodes for Room-Temperature Rechargeable Magnesium Batteries.

Rechargeable magnesium batteries are promising candidates for post-lithium-ion batteries, owing to the large source abundance and high theoretical energy density. However, there remain few reports on constructing practical cells with oxide cathodes and Mg anodes at room temperature. In this work, we compare the reaction behavior of various MnO polymorph cathodes in two representative electrolytes: Mg[TFSA]/G3 and Mg[Al(hfip)]/G3.