Unraveling the electrochemical properties of CuCo₂S₄ nanoflakes adorned on multi-walled carbon nanotubes for high-performing aqueous asymmetric supercapacitor

Bimetallic transition metal sulfides have come into sight as viable materials for future-oriented supercapacitors owing to their ability to concurrently assure high conductivity and stability during electrochemical processes. Therefore, in the present work, CuCo₂S₄ nanoflakes are prepared by feasible hydrothermal technique. The prepared material is characterized by numerous characteristic techniques. Further, the electrochemical characteristics of CuCo₂S₄ nanoflakes are investigated. The CuCo₂S₄ nanoflakes electrode exhibits 800 F g⁻¹ of specific capacitance at 1 A g⁻¹. Further, the capacitance of CuCo₂S₄ is boosted by adding up a modest quantity of multi-walled carbon nanotubes (MWCNTs), and enhanced specific capacitance of 1086 F g⁻¹ is attained at 1 A g⁻¹ from MWCNT/CuCo₂S₄ nanocomposite. Finally, asymmetric supercapacitor (ASC) is fabricated by MWCNT/CuCo₂S₄ and activated carbon (AC). Further, 34.08 W h kg⁻¹ of energy density is observed with power density 775 W kg⁻¹ from MWCNT/CuCo₂S₄//AC. Furthermore, different color light-emitting diodes (LEDs), kitchen timer and small motor fan are powered by two MWCNT/CuCo₂S₄//AC connected in series.