SnS₂@recycled graphene analogs for photoassisted sodium-ion batteries

A bifunctional photoanode, integrating SnS₂ nanosheets with recycled graphene analogs (RGA) into a heterojunction, was developed for photoassisted sodium-ion batteries (PSIBs). Under illumination, the SnS₂@RGA photoanode delivers a 16.7% higher Na-ion storage capacity at 0.5 A g^-1 than in the dark, attributed to accelerated charge-transfer kinetics and enhanced Na⁺ diffusion via photoelectric synergy. Remarkably, the integrated PSIB can be exclusively photo-charged to an open-circuit voltage of 0.6 V, followed by a continuous discharge for 100 minutes, confirming the effective conversion and storage of solar energy.