Synthesis of graphene-MnO₂-poly (2,2’-dithiodianiline) composite for high performance electrochemical electrode materials

Abstract

Abstract In this study, a hybrid graphene/manganese dioxide/poly(2,2’-dithiodianiline) (graphene/MnO 2 /PDTDA) composite material was in-situ prepared by chemical oxidative polymerization of PDTDA in graphene/MnO 2 and applied as supercapacitor electrode materials in alkaline electrolyte. The morphology, structure, and particularly the electrochemical performances of such graphene/MnO 2 /PDTDA composite was characterized by XRD, SEM, FTIR, and electrochemical tests. The results showed that the graphene/MnO 2 /PDTDA ternary composite possessed the advantages of both double-layer capacitance and Faraday’s pseudocapacitance behaviours, thus leading to the highest specific capacitance of 96.35 F·g −1 as compared to the binary MnO 2 /PDTDA electrode material (35.26 F·g −1 ) at a current density of 10 mA·cm −1 , implying potential candidate in future supercapacitor electrode materials.