Formulation of Hierarchical Nanowire-Structured CoNiO₂ and MoS₂/CoNiO₂ Hybrid Composite Electrodes for Supercapacitor...

Hierarchical porous nanowire-like MoS₂/CoNiO₂ nanohybrids were synthesized via the hydrothermal process. CoNiO₂ nanowires were selected due to the edge site, high surface/volume ratio, and superior electrochemical characteristics as the porous backbone for decoration of layered MoS₂ nanoflakes to construct innovative structure hierarchical three-dimensional (3D) porous NWs MoS₂/CoNiO₂ hybrids with excellent charge accumulation and efficient ion transport capabilities. Physicochemical analyses were conducted on the developed hybrid composite, revealing conclusive evidence that the CoNiO₂ nanowires have been securely anchored onto the surface of the MoS₂ nanoflake array. The electrochemical results strongly proved the benefit of the hierarchical 3D porous MoS₂/CoNiO₂ hybrid structure for the charge storage kinetics. The synergistic characteristics arising from the MoS₂/CoNiO₂ composite yielded a notably high specific capacitance of 1340 F/g at a current density of 0.5 A/g. Furthermore, the material exhibited sustained cycling stability, retaining 95.6% of its initial capacitance after 10 000 long cycles. The asymmetric device comprising porous MoS₂/CoNiO₂//activated carbon encompassed outstanding energy density (93.02 Wh/kg at 0.85 kW/kg) and cycling stability (94.1% capacitance retention after 10 000 cycles). Additionally, the successful illumination of light-emitting diodes underscores the significant potential of the synthesized MoS₂/CoNiO₂ (2D/1D) hybrid for practical high-energy storage applications.