Comparison of Chloroaluminate Melts for Aluminum Graphite Dual‐Ion Battery Application

Herein, we report a comparison of aluminum graphite dual‐ion cells (AGDICs) electrochemical characteristics employing the conventional 1‐ethyl‐3‐methylimidazolium chloride:aluminum trichloride (EMIMCl : AlCl$_{3}$) electrolyte and two popular deep eutectic solvents (DESs), namely urea : AlCl$_{3}$ and acetamide:AlCl$_{3}$. The three electrolytes′ characteristics have been evaluated in terms of Al‐stripping deposition capability and cycling behavior in AGDICs. The results evidence the EMIMCl : AlCl$_{3}$′s Al‐stripping deposition and rate capability in AGDICs superior characteristics addressed to the lower viscosity and higher conductivity with respect to the urea : AlCl$_{3}$ and acetamide:AlCl$_{3}$. On the other hand, the urea : AlCl$_{3}$ guarantees a much higher columbic efficiency in AGDICs, thanks to the superior electrochemical window stability.