Electrode material based on multilayer graphene oxide for chemical current sources

Abstract

The results of the studies of the electrochemical synthesis of multilayer graphene oxide were presented, and the possibility of using it as an electrode material of the supercapacitor was shown. In an alcohol suspension the thickness of the particles of multilayer graphene oxide was less than 0.1 μm with an area of more than 100 μm2. The graphene oxide-based electrode has a high specific capacity of 107 F⋅g − 1 and a high charge retention rate of 97% after 5000 cycles. It was shown that the graphene oxide electrode had a maximum specific energy of 8.7 W⋅h⋅kg − 1 at the current density of 0.1 A⋅g − 1 and had a maximum power of 2291.1 W⋅kg − 1 at the current density of 4 A⋅g − 1. The application of a lithium-thionyl chloride cell with a multilayer graphene oxide cathode on a nickel grid was tested. It was found that graphene oxide synthesized using the electrochemical method is a promising electrode material for creating a symmetric supercapacitor.

Keywords

• graphene oxide electrochemical synthesis supercapacitor
• chemical current source