Ionic liquid mixtures as energy storage materials: a preliminary and comparative study based on thermal storage density.Fifteen equimolar binary mixtures are synthesized and thermophysically evaluated in this study.  The objective is to compare and elucidate the impact of small structural changes on the thermal properties.  Additionally, due to their higher densities, these mixtures achieve a thermal storage density equivalent to that of mixtures with longer chains.  Moreover, their thermal storage density surpasses that of some conventional materials commonly used for energy storage.
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