ZnFe2O4//rGH水系光辅助充电超级电容器的构建与性能研究OA

Synergistic innovation of solar energy collection and storage technology provides an important direction for constructing a new type of self-supply system,in which photo-assisted charging supercapacitor has become a research hotspot due to their unique photo-induced charge storage mechanism and fast charging/discharging characteristics with high power density and fast charging/discharging characteristics,which provides an efficient,environmentally friendly,and sustainable new strategy for energy harvesting and storage in wearable electronic devices and other related products.In this work,ZnFe2O4 was synthesized by hydrothermal method and employed as the supercapacitor photoanode,while reduced graphene oxide hydrogel(rGH),prepared using an improved Hummers method followed by hydrothermal treatment,served as the cathode,and Zn(CF3SO3)2 aqueous solution was used as the electrolyte to construct an aqueous photo-assisted charging supercapacitor.The results from the synthesized products,including phase composition,microscopic morphology,chemical structure,light absorption properties,and photoelectrochemical performance of the supercapacitor,show that under the photoelectrical synergistic charging conditions(a current density of 0.2 A·g–1 and a light intensity of 95 mW·cm–2),specific capacity of supercapacitor reaches 148 F·g–1,17%higher than that under only electric charging conditions.The capacity retention rates of the device are 80%and 90%after 10000 cycles under only electric charging and photoelectric synergistic charging,respectively.Based on all above results,the constructed aqueous photo-assisted charging supercapacitor exhibits high specific capacity and excellent cycling stability,demonstrating promising potential for applications in wearable electronics and related fields.