Abstract
Designing of efficient electrode material for the enhancement of energy density with extended cycle life for supercapacitors is a crucial factor. Transition metal oxides (TMOs) and Mixed TMOs are such nanomaterials which has been explored extensively due to its cost-effective and earthly abundance. But the low specific capacitance with electrochemical and structural instabilities obstructs TMOs from its practical application. To address this challenge, a low-cost nanocomposite with a delafossite-type (CuCrO2(CCO)) and perovskite-type (CuZrO3(CZO)) crystal structure has been developed which displayed an enhanced electrochemical activity and prolonged cycle life for charge storage applications. This nanocomposite demonstrated remarkable charge storage capability, delivering maximum capacity value of 179.5 C/g (373.12 F/g) in 2 M potassium hydroxide (KOH) at 0.5 A/g, and sustaining cycle life of 5000 GCD runs at 5 A/g. Furthermore, we constructed a hybrid supercapacitor (HSC) device that revealed high power and energy density of 600 W/kg and 24 Wh/kg at 1 A/g, and preserved 80 % of its capacitance with a minimal loss in coulombic efficiency. Additionally, to ascertaining the potential sustainability in energy storage applications, we have integrated them with a commercially available photovoltaic (PV) module and demonstrated the device’s capability to power a standard light emitting diode (LED).
