Carbon materials as a cathode for aluminum-ion battery

Abstract Activated carbon and fine-dispersed flake and spherical graphite were investigated as cathode materials for an aluminum-ion battery with an electrolyte of 1-ethyl-3-methylimidazolium chloride/AlCl 3 (1:2). Cyclic voltammograms and the discharge curves for the activated carbon is fundamentally different from ones for graphite. It is assumed that the mechanism of operation of the activated carbon is based on the charging of the double electric layer, in contrast to graphite, where the main mechanism is the intercalation of the electrolyte ions into the crystal lattice. Specific capacity achieved 117mAh/g for activated carbon and 59 mAh/g for graphite (at 2,5V and 75mA/g)