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

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%. CoMoO4 PNSs 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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