Investigation on tunable optical properties and structures of graphene quantum dots doped with sulfur heteroatoms

• Key Words:CHALLENGES; ENERGY
• Abstract:The development of photo-assisted lithium-ion batteries (P-LIBs) holds immense promise for enhancing battery performance and enabling self-charging capabilities. However, the realization of these transformative devices hinges on the creation of novel photoelectrodes with exceptional light absorption and electrochemical properties. In this study, we introduce a composite photocathode composed of TiO2 and LiFePO4, demonstrating remarkable dual functionality for light-to-electricity conversion and energy storage. Comparative analysis reveals substantial improvements in the charge/discharge capacity of P-LIBs under sunlight, with enhancements of 6.6 % and 4.6 % at a 0.5 C rate. Our findings attribute these performance gains to rapid Li conduction, facilitating complete valence state transitions between Fe2 and Fe3 under sunlight conditions. This work paves the way for significant advancements in photoelectrode design for P-LIBs.
• Volume:50
• Issue:7
• Translation or Not:no