Vanadium(V) oxide coated by poly(3,4-ethylenedioxythiophene) as cathode for aqueous zinc-ion batteries with improved electrochemical performance

[Display omitted] •V2O5/PEDOT electrodes reach high steady-state capacity without activation processes.•PEDOT coated V2O5 reaches 380 mA⋅h⋅g−1 at 0.3 A⋅g−1 and 344 mA⋅h⋅g−1 at 1 A⋅g−1.•PEDOT layer enhances the properties of the electrode, compared to pristine V2O5. Vanadium(V) oxide was coated by po...

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Bibliographic Details
Published in:Materials letters 2022-02, Vol.308, p.131210, Article 131210
Main Authors: Volkov, F.S., Tolstopjatova, E.G., Eliseeva, S.N., Kamenskii, M.A., Vypritskaia, A.I., Volkov, A.I., Kondratiev, V.V.
Format: Article
Language:English
Subjects:
Aqueous zinc-ion batteries, V2O5
Cathodes
Composite materials
Electrochemical analysis
Electrochemical performance
Electrode materials
Energy storage and conversion
Materials science
Oxidation
Poly(3,4-ethylenedioxythiophene)
Rechargeable batteries
Vanadium pentoxide
Zinc
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Summary:[Display omitted] •V2O5/PEDOT electrodes reach high steady-state capacity without activation processes.•PEDOT coated V2O5 reaches 380 mA⋅h⋅g−1 at 0.3 A⋅g−1 and 344 mA⋅h⋅g−1 at 1 A⋅g−1.•PEDOT layer enhances the properties of the electrode, compared to pristine V2O5. Vanadium(V) oxide was coated by poly(3,4-ethylenedioxythiophene) (PEDOT) by chemical oxidation of EDOT. The obtained composite (V2O5/PEDOT) was studied as cathode material for aqueous zinc-ion batteries. V2O5/PEDOT electrodes demonstrate excellent electrochemical performance in the (0.3–1.4) V (vs. Zn/Zn2+) potential range in comparison to electrodes based on the pristine V2O5. V2O5/PEDOT material provides high specific capacity 380 mA⋅h⋅g−1 at 0.3 A⋅g−1, improved C-rate capability (274 mA⋅h⋅g−1 and 102 mA⋅h⋅g−1 at 5 A⋅g−1 and 20 A⋅g−1, and better stability during long-term cycling (7% capacity fading during 200 cycles at 5 A⋅g−1).
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.131210