Electrode for a Supercapacitor Based on Electrochemically Synthesized Multilayer Graphene Oxide

• Published in: Russian journal of applied chemistry Vol. 94; no. 3; pp. 370 - 378
• Main Authors: Gorshkov, N. V., Yakovleva, E. V., Krasnov, V. V., Kiselev, N. V., Artyukhov, D. I., Artyukhov, I. I., Yakovlev, A. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.03.2021; Springer Nature B.V
• Subjects: Anodizing; Applied Electrochemistry and Metal Corrosion Protection; Charge transfer; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Current density; Electrode materials; Electrodes; Graphene; Industrial Chemistry/Chemical Engineering; Maximum power; Multilayers; Oxidation; Supercapacitors; Synthesis; multilayer graphene oxide; electrode; impedance; anodic oxidation; supercapacitor
• ISSN: 1070-4272; 1608-3296
• DOI: 10.1134/S1070427221030149

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 μm with an area of more than 100 μm 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.