“…The most popular electrode materials for supercapacitors are transition metal oxides (TMOs), 14–17 which include NiO, 18 CuO, 19 MnO 2 , 20 Fe 3 O 4 , 21 Co 3 O 4 , 22 and others. These materials offer several benefits, including rich oxidation states, great mechanical stability, and outstanding electrochemical activity.…”