Effect of H2/Ar Ratio on the Photoanodic Currents of Graphene/MoS2 Films

Abstract

Enhancing advanced solar energy storage in rechargeable batteries is one of the most critical challenges in clean energy technology aimed at reducing air pollution and dependence on fossil fuels. It has been demonstrated that dye-sensitized electrodes, silicon electrodes, and transition metal-based photoelectrodes can be applied in solar-charged rechargeable batteries to effectively capture visible light. However, potential pollution and cost issues limit their large-scale applications. This study aims to reduce the increased charging potential, caused by the high overvoltage due to the dissolution of compounds such as lithium peroxide and lithium carbonate, through photo-assisted charging. To achieve this goal, efficient graphene/MoS2 composites are synthesized with chemical vapor deposition (CVD), and their photoelectrochemical properties are characterized to facilitate efficient photocharging. In this context, by positively altering the carrier gas ratio towards H2 (from 30% to 60%), samples are synthesized at different H2/Ar ratios to investigate the varying ratio's impact on photoanodic currents.