Construction and Performance of ZnFe2O4//rGH Aqueous Photo-assisted Charging Supercapacitor

doi:10.15541/jim20250074

Abstract

Abstract: The 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 the hydrothermal method and employed as the supercapacitor photoanode, while reduced graphene oxide hydrogel (rGH) was 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 study of the synthesized products, including phase composition, microscopic morphology, chemical structure, light absorption properties, and the photoelectrochemical performance of the supercapacitor, show that under the photoelectrical synergistic charging conditions (current density of 0.2 A·g^-1 and light intensity of 95 mW·cm^-2), the specific capacity of supercapacitor reaches 148 F·g^-1, 17% higher than that with only electric charging conditions. The capacity retention rates of the device are 80% and 90% for 10000 cycles under only electric charging and photoelectric synergistic charging, respectively. 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.

Key words: ZnFe₂O₄, rGH, supercapacitor, photoelectric performance

CLC Number:

O646

WANG Yu, BASSANYIN Christopher, LIU Xin, WANG Yanxiang, LI Jiake. Construction and Performance of ZnFe₂O₄//rGH Aqueous Photo-assisted Charging Supercapacitor[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250074.

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Construction and Performance of ZnFe₂O₄//rGH Aqueous Photo-assisted Charging Supercapacitor

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