| Autor: |
Filipp S. Volkov, Svetlana N. Eliseeva, Mikhail A. Kamenskii, Alexey I. Volkov, Elena G. Tolstopjatova, Veniamin V. Kondratiev |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Journal of Electrochemical Science and Engineering (2023) |
| Druh dokumentu: |
article |
| ISSN: |
1847-9286 |
| DOI: |
10.5599/jese.1595 |
| Popis: |
Vanadium oxide composites with conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) were obtained by one-step microwave-assisted hydrothermal synthesis at two different temperatures: 120 and 170 °C (denoted as V-120 and V-170, respectively). The structure and composition of the obtained samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, X-ray photoelectron spectroscopy (XPS), and thermogravimetric (TG) analysis. The detailed study of the electrochemical properties of the composites as cathodes of aqueous zinc-ion battery was performed by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) at different current densities and by electrochemical impedance spectroscopy (EIS). It was shown that V-120 demonstrated excellent electrochemical performance in the 0.3 to 1.4 V vs. Zn/Zn2+ potential range reaching specific capacities of up to 390 mA∙h∙g−1 at 0.3 A∙g−1 with excellent capacity stability after 1000 charge-discharge cycles. Its functional parameters were found to be much better than those of the electrodes based on the V-170 composite obtained at a higher temperature. The effect of the synthesis temperature on the electrochemical properties is discussed in terms of the crystallographic, compositional, and thermogravimetric properties of the samples. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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