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 NiCo 2 O 4 was synthesized along the nanofibers by a brief hydrothermal method. As-prepared NiCo 2 O 4 /CNF composite holds unique structure with NiCo 2 O 4 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.