Layered marigold-flower-like CdS/MoS2-reduced graphene oxide nanocomposite as an efficient electrode material for supercapacitor

Abstract

Technological advances have become a fundamental part of everyday life, and the demand for energy-storing devices has grown exponentially. Therefore, the development of energy storage devices is needed to fulfil global energy demands. Consequently, materials and devices for energy storage have long-term clean and renewable energy sources, which are widely accessible owing to their cost-effective and environmentally friendly nature. Transition metal chalcogenides are useful as active electrode materials for enhancing the capacity for energy storage. Considering the requirement of a large surface for energy storage, we have synthesized Marigold flower-like CdS/MoS₂ nanoflowers on rGO nanosheets by simple hydrothermal synthesis. The CdS/MoS₂-rGO nanocomposite symmetric supercapacitor device exhibited increased capacitance of 102 F g⁻¹ at a current density of 0.1 A g⁻¹, and 83.4% of the capacitance was retained up to 16 × 10⁻³ cycles at the current density of 5 A g⁻¹. The resulting CdS/MoS₂- rGO nanocomposite can deliver excellent electrochemical performance. Supercapacitors under study demonstrated high energy storage capabilities, resulting in an efficient device for electrochemical energy storage.