Reduced graphene oxide grafted with poly(p-styrenesulfonate) (rGO-g-PSS) was synthesized by in-situ free radical polymerization. The rGO-g-PSS was used to induce formation of polyaniline (PANI) nanorod array and then assembled with MnO2 to form rGO-g-PSS@PANI-MnO2 hybrids. The rGO-g-PSS@PANI-nO(2) hybrids were applied to modify electrodes and the specific capacitance (SC) of the rGO-g-PSS@PANI-MnO2 hybrid reached 425 F/g at the scan rate of 20 mV/s, which was much higher than those of rGO-g-PSS (190 F/g), MnO2 (203 F/g), rGO-g-PSS@PANI (305 F/g) and rGO-MnO2 (295 F/g). In addition, the rGO-g-PSS@PANI-MnO2 hybrid also showed good stability. These good electrochemical performances are due to that rGO-g-PSS@PANI-MnO2 hybrid could make full use of the high SC of PANI and MnO2, high specific surface area and conductivity of rGO, and good interfacial properties of PSS linker. (C) 2015 Elsevier B.V. All rights reserved.