1. Hydrothermally Synthesized Zinc Vanadate Rods for Electrochemical Supercapacitance Analysis in Various Aqueous Electrolytes.
- Author
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Suganya, B., Chandrasekaran, J., Maruthamuthu, S., Saravanakumar, B., and Vijayakumar, E.
- Subjects
ZINC electrodes ,SUPERCAPACITOR electrodes ,AQUEOUS electrolytes ,ELECTROCHEMICAL analysis ,FIELD emission electron microscopy ,MATERIALS testing ,ZINC - Abstract
Zinc vanadate (Zn
3 V2 O8 ) rods have been prepared using easy and economical hydrothermal technique and are explored for supercapacitor electrode application. X-ray diffraction (XRD) and Field emission scanning electron microscopy (FESEM) were analysed for the structure and morphology of the sample. The electrochemical performance of the Zn3 V2 O8 electrode was investigated using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge–discharge test. The performance of Zn3 V2 O8 in water soluble electrolytes, such as K2 SO4 , Na2 SO4 and KOH were analysed, and the results demonstrated unique double layer properties of the material. The electrode material tested in 0.5 M K2 SO4 showed good supercapacitive performance in terms of specific capacitance and efficiency when compared to other electrolytes. We have obtained a specific capacitance of 213 F g−1 at current density of 1 A g−1 . This electrode exhibits very less charge transfer resistance (3.3 Ω) in potassium sulphate electrolyte and is lower than other electrolytes. Moreover, Zn3 V2 O8 provided enhanced rate capacity, with (77%) of retention capacity for charge–discharge up to 1000 cycles. [ABSTRACT FROM AUTHOR]- Published
- 2020
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