Hierarchically fabricated nano flakes-rod-like CoMoO–S supported Ni-foam for high-performance supercapacitor electrode material

Abstract

Nano-sized CoMoO has emerged as a gifted contender for renewable energy conversion storage applications. However, the limited stability and unique surface areas of oxide-based materials present challenges in the use of supercapacitors (SCs). In this work, we employed a facile hydrothermal method to hierarchically fabricate nanoflakes-rod-like CoMoO–S materials on nickel foam (NF). The resulting electrodes exhibited remarkable electrochemical activity, attributed to the synergistic properties of the well-allied CoMoO 2D nanorods. Notably, the developed CoMoO–S nanoflakes-rod (3D-2D) composites proved an excellent specific capacitance of 1087 F g−1 at 2 A/g current density, along with excellent rate capabilities surpassing those of single CoMoO nanorods electrodes. Furthermore, the CoMoO–S nanoflakes-rod composites exhibited notable cyclic stability, with a retention rate of 86.3 % above 5000 cycles. The exceptional electrochemical characteristics displayed by electrode materials typically used in batteries provide a hopeful strategy for the advancement of high-performance supercapacitors.