Microwave-assisted vanadium interpolated cobalt-MOF cathode assembled 3 V high performing asymmetric supercapacitor with ionic liquid gel polymer electrolyte

To ameliorate energy storage and conversion, metal synergy, and structural stability, bimetal-assembled metal–organic frameworks (MOFs) are delved into. Augmented surface area, pseudo capacitance, and the ability to alter the MOF edifice of layered oxide have drawn interest in MOF-based oxide layered structures. Simple microwave and hydrothermal techniques use dimethyl formamide and water as solvents and annealing methods to generate the bimetallic organic framework’s Co₃V₂O₈ and Co₃VO₄ cathode material. Those customized shapes boost redox sites and reduce ion electron distance. Due to cobalt’s faradaic process and vanadium’s highly layered attributes, supercapacitor electrode response is significant. Co₃V₂O₈ has 1391F/g specific capacitance at 2 mV/s scan rate and 1309F/g at 4 mA/cm² implemented current value. After 10,000 cycles, the cathode material depicts 89 % capacity retention and 98 % coulombic efficiency. Biowaste-derived activated carbon is combined with a Co₃V₂O₈ cathode for asymmetric supercapacitor storage. That device works on 3 V windows with ionic liquid gel polymer electrolyte. With a maximum specific energy of 329.3 Wh/kg and specific power of 15250 W/kg, the achieved galvanometric capacitance is 263.5F/g and 220 mAh/g at the 9 mA/cm² current and showed 88.5 % potential stability after 10,000 cycles. These findings corroborate its use as a supercapacitor cathode.