Preparation and performance of NiCo2O4 nanowires-loaded graphene as supercapacitor material

► NiCo2O4@RGO was prepared by a novel facile method without any surfactant. ► NiCo2O4 nanowires with average length of 80 nm and diameter of 10 nm were obtained. ► NiCo2O4 nanowires are uniformly dispersed on the graphene sheets. ► NiCo2O4@RGO exhibits excellent electrochemical performance and cycle stability.