Nanoneedle-like NiCo2O4 Decorated Carbon Nanofiber Electrodes for Supercapacitors

Abstract

Abstract Flexible electrodes based on carbon fiber with excellent conductivity were utilized in supercapacitor applications. Herein, the nanostuctured NiCo2O4 was synthesized along the nanofibers by a brief hydrothermal method. As-prepared NiCo2O4/CNF composite holds unique structure with NiCo2O4 nanoneedles uniformly grown on every carbon nanofiber, which promised shorter diffusion of electrons and ions. The composite electrode held a high capacitance of 660.41 F g−1 and showed great capacitance retention of 90.95% after 6000 cycles, which could be beneficial in future application of supercapacitors.