Abstract
AbstractMagnesium batteries are promising candidates for post‐lithium energy storage systems due to their low cost, high volumetric energy density, and low risk of dendrite formation. This study reports a new magnesium ion conducting ionogel electrolyte based on a Metal‐Organic Framework (MOF) structure (UiO‐66) impregnated with an ionic liquid, magnesium bis[(trifluoromethyl)sulfonyl]imide in 1‐ethyl‐3‐methylimidazolium bis[(trifluoromethyl)sulfonyl]imide. Comparably high conductivity of 5.7×10−5 S cm−1 can be achieved at room temperature. By employing the prepared MOF‐ionogel electrolyte, a reversible quasi‐solid‐state magnesium battery (QSSMB) is reported. Surface analysis unveils the possible origin of the large overpotential of magnesium plating and stripping. The findings suggest that MOF‐based materials are a promising class of ionogel electrolyte templates for QSSMBs. The results on the magnesium anode will be useful to define optimization strategies for magnesium metal anodes in SSMBs.
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