One dimensional nickel oxide-decorated cobalt oxide (Co3O4) composites for high-performance supercapacitors

One dimensional porous NiO-decorated Co3O4 composites were synthesized via a two-step solution-based method. The composites were detected by X-ray photoelectron spectroscopy (XPS), and it shows that the atomic ratio of nickle is about 1.74% in the composite. The obtained NiO-decorated Co3O4 composite yields a high specific capacitance of 1112 F g(-1) at a current density of 2 A g(-1), exhibits perfect rate and cycling stability. Furthermore, the specific capacitance of the composite can still keep a good retention of 97% after 1000 cycles at 2 A g(-1), demonstrating the excellent long-term electrochemical stability of the composite. (C) 2015 Elsevier B.V. All rights reserved.