Facile synthesis of hierarchical NiCo2O4/NiO nanorods for high-performance supercapacitor

A simple approach to prepare NiCo2O4/NiO nanorods assembled from nanoparticles has been explored. The length and width of the nanorods can be easily controlled by adjusting the amount of metal salts. The nanorods present excellent electrochemical performance when used as electrode materials for supercapacitor. The large surface area and the small diameter provide not only rich active sites and high utilization of materials, but also the ability to accommodate volume changes. The materials exhibited a specific capacitance of 1395 F g- 1 (697.5 C g-1, 1 A g- 1) and good cycle stability with the capacitance retention of 123.6% after 5000 cycles.

Automated summary

We explored a simple method to prepare NiCo2O4/NiO nanorods assembled from nanoparticles. The length and width of the nanorods can be easily controlled by adjusting the amount of metal salts. When used as electrode materials for supercapacitors, the nanorods exhibit excellent electrochemical performance. With a specific capacitance of 1395 F g-1 (697.5 C g-1, 1 A g- 1) and a capacitance retention of 123.6% after 5000 cycles, the nanorods show good cycle stability.