Synergistically Driven CoCr-LDH@VNiS<sub>2</sub> as a Bifunctional Electrocatalyst for Overall Water Splitting and Flexible Supercapacitors
Payal Chauhan, Sohel Siraj, Karunan Joseph, Shweta D. Dabhi, Gopala Ram Bhadu, Parikshit Sahatiya, C.K. Sumesh
Abstract
Utilizing alternative energy sources to fossil fuels has remained a significant issue for humanity. In this context, efficient earth-abundant bifunctional catalysts for water splitting and energy storage technologies like hybrid supercapacitors have become essential for achieving a sustainable future. Herein, CoCr-LDH@VNiS 2 was synthesized by hydrothermal synthesis. The CoCr-LDH@VNiS 2 catalyst entails 1.62 V cell voltage to reach the current density of 10 mA cm –2 for overall water splitting. The CoCr-LDH@VNiS 2 electrode illustrates a high electrochemical specific capacitance (Csp) of 1380.9 F g –1 at a current density of 0.2 A g –1 and an outstanding stability with 94.76% retention. Moreover, the flexible asymmetric supercapacitor (ASC) achieved an energy density of 96.03 W h kg –1 @0.2 A g –1 at a power density of 539.98 W kg –1 with remarkable cyclic stability. The findings provide a new approach toward the rational design and synthesis of bifunctional catalysts for water splitting and energy storage.