Synergistically Driven CoCr-LDH@VNiS₂ as a Bifunctional Electrocatalyst for Overall Water Splitting and Flexible Supercapacitors

Utilizing alternative energy sources to fossil fuelshas remaineda significant issue for humanity. In this context, efficient earth-abundantbifunctional catalysts for water splitting and energy storage technologieslike hybrid supercapacitors have become essential for achieving asustainable future. Herein, CoCr-LDH@VNiS2 was synthesizedby hydrothermal synthesis. The CoCr-LDH@VNiS2 catalystentails 1.62 V cell voltage to reach the current density of 10 mAcm(-2) for overall water splitting. The CoCr-LDH@VNiS2 electrode illustrates a high electrochemical specific capacitance(Csp) of 1380.9 F g(-1) at a current density of 0.2A g(-1) and an outstanding stability with 94.76% retention.Moreover, the flexible asymmetric supercapacitor (ASC) achieved anenergy density of 96.03 W h kg(-1)@0.2 A g(-1) at a power density of 539.98 W kg(-1) with remarkablecyclic stability. The findings provide a new approach toward the rationaldesign and synthesis of bifunctional catalysts for water splittingand energy storage.