Fast and Simple Preparation of Supercapacitor with CoMoO4 as Electrode and Study of Its Photocatalytic Performance

Wang, Jing; Wang, Gang; Hao, Jian; Wang, Shen

doi:10.30492/ijcce.2022.556471.5404

Fast and Simple Preparation of Supercapacitor with CoMoO4 as Electrode and Study of Its Photocatalytic Performance

Document Type : Research Article

Authors

¹ School of Light Industry, Harbin University of Commerce, Harbin, P.R. CHINA

² State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Ningxia, P.R. CHINA

³ MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, P.R. CHINA

10.30492/ijcce.2022.556471.5404

Abstract

In this paper, CoMoO₄ Porous NanoSheets (PNSs) were successfully fabricated on a carbon cloth substrate by a low-temperature water bath method. Through morphological characterization and phase analysis, the synthesized product is CoMoO₄ nanosheet, which has a porous structure with a diameter of about 400 nm and a thickness of about 100 nm. Through the electrochemical performance test, the synthesized product has good electrochemical performance. Under the condition of 1 A/g, the specific capacitance of CoMoO₄ PNSs is 1800 F/g, and after 10000 cycles of charging and discharging, the capacity maintenance rate is 99.6%. CoMoO₄PNSs is a positive electrode, and activated carbon (AC) is a negative electrode. The device is assembled, and its theoretical voltage window reaches 1.6 V. After 8000 cycles of charging and discharging, the specific capacitance decreased from 121 F/g to 113 F/g, retaining 93.38% capacitance. In addition, we further studied the photocatalytic degradation of dyes on the synthetic materials. The degradation rates of Methyl orange (MO), Rhodamine B (RhB), and Congo Red (CR) dyes were 94.2%, 98.1%, and 96.4%, respectively. We further explored the cyclic stability of the material for RhB dye degradation. After 5 cycles of testing, it was found that the stability is very good, and can maintain 98.6%. The excellent electrochemical and photocatalytic properties of CoMoO₄ PNSs are mainly attributed to the special porous sheet structure and CoMoO₄ material. This work provides a new strategy and method for preparing excellent electrode materials and photocatalyst materials.

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References

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