The composite material was obtained by the polymerization of aniline in the presence of graphene oxide nanosheets. The resulting composite containing polyaniline (72%) and graphene oxide nanosheets (28%) was investigated by XPS, TGA, Raman and IR spectroscopy. A partial reduction of graphene oxide was observed in the process of polymerization. The specific capacitance of the polyaniline/graphene oxide composite electrode in H2SO4 (1 M concentration), corresponding to its discharge from 0.700 to 0.052 V, was found to be 547 F g(-1). (c) 2012 Elsevier B.V. All rights reserved.