Abstract
Hybrid supercapacitors (HSCs) have received a lot of interest because of their excellent stability and energy storage capacity. To design a HSC device, we synthesized cobalt magnesium sulfide (CoMgS) using an easy hydrothermal technique. Thesurface properties, crystallinity, elemental analysis, and homogeneity are analysed. The CNT@CoMgS nanocomposite is demonstrated a considerably improved specific capacity (Qs) of 698.88C/g or 1164.8F/g compared to the other samples. The CNT@CoMgS//AC-based HSC revealed a high Qs value of 249.88C/g and an energy density of 70 Wh/kg with an astonishing power density of 880 W/kg. In photoelectrochemical activity, the CNT@CoMgS electrode exhibited a fast response and recovery time with good photoactivity, which is used to perform excellent photo switching. Hence, the CNT@CoMgS@AC electrode demonstrated extraordinary performance because of its largesurface area, quick transport of charge carriers, and extraordinary rate capability, which emphasizes its promise for electrochemical energy storage applications.
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