Electrode for a Supercapacitor Based on Electrochemically Synthesized Multilayer Graphene Oxide

Multilayer graphene oxide was synthesized by anodic oxidation of dispersed graphite, and the efficiency of its use as an electrode material for a supercapacitor was shown. In an alcohol suspension, the thickness of multilayer graphene oxide particles is less than 0.1 mu m with an area of more than 100 mu m(2). The multilayer graphene oxide electrode has a high specific capacity of 107 F g(-1) and a high charge retention rate of 97% after 5000 cycles at a current of 2 A g(-1). The multilayer graphene oxide electrode demonstrated a maximum specific energy of 8.7 W h kg(-1) at a current density of 0.1 A g(-1) and a maximum power of 2291.1 W kg(-1) at a current density of 4 A g(-1). The impedance data at various DC voltages showed that after 5000 cycles, the charge transfer resistance increases by 26%. It was found that multilayer graphene oxide synthesized by the electrochemical method is a promising electrode material for producing a symmetric supercapacitor.