NiCoV@CNT Directly Anchored on Carbon Paper for High- Performance Supercapacitors
The Korean Electrochemical Society, BEXCO Busan, Korea (2025)
Joon Pyo Hong, Yong Yeol Park, Soyeon Han, Dae Hwan Kim, Jun Seok Park, Soo Yeon So, Hyeon Seok Choi, Young Joon Yoo, Yuanzhe Piao, Sang Yoon Park
[Abstract]
Ni–Co–V ternary oxide nanostructures were directly grown on carbon nanotubes (CNTs) supported on carbon paper via a simple hydrothermal method using nickel nitrate hexahydrate (Ni(NO₃)₂·6H₂O), cobalt nitrate hexahydrate (Co(NO₃)₂·6H₂O), urea, and vanadium(III) chloride (VCl₃) as precursors. The urea acted as a slow - releasing source of hydroxyl ions, leading to uniform nucleation of NiCoV hydroxides on the CNT surface. During synthesis, the CNT network provided a conductive scaffold that enabled NiCoV nanostructures to grow homogeneously and firmly anchor onto the carbon paper substrate. After annealing, the NiCoV@CNT electrode exhibited a porous interconnected structure that promoted fast ion diffusion and electron transport.
The NiCoV@CNT/carbon paper electrode delivered an enhanced specific capacitance of 998.0 F/g at 1.0 A/g, outperforming the CNT-free NiCoV electrode (635.6 F/g). Moreover, cyclic voltammetry and charge–discharge measurements confirmed that the electrode maintained its structural integrity without detachment or damage of the active materials during repeated testing. These results highlight the synergistic effect between Ni, Co, and V active sites and the conductive CNT framework, suggesting that the NiCoV@CNT/carbon paper composite is a promising candidate for high-performance supercapacitor electrodes.
Keywords : NiCoV oxide, CNT, Supercapacitor, Electrochemical performance, Hydrothermal synthesis