TY - JOUR

T1 - Vanadium Oxide-Poly(3,4-ethylenedioxythiophene) Nanocomposite as High-Performance Cathode for Aqueous Zn-Ion Batteries: The Structural and Electrochemical Characterization

AU - Волков, Филипп Сергеевич

AU - Елисеева, Светлана Николаевна

AU - Каменский, Михаил Александрович

AU - Волков, Алексей Игоревич

AU - Толстопятова, Елена Геннадьевна

AU - Глумов, Олег Владимирович

AU - Fu, Lijun

AU - Кондратьев, Вениамин Владимирович

N1 - Publisher Copyright: © 2022 by the authors.

PY - 2022/11/4

Y1 - 2022/11/4

N2 - In this work the nanocomposite of vanadium oxide with conducting polymer poly(3,4-ethylenedioxythiophene) (VO@PEDOT) was obtained by microwave-assisted hydrothermal synthesis. The detailed study of its structural and electrochemical properties as cathode of aqueous zinc-ion battery was performed by scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction analysis, X-ray photoelectron spectroscopy, thermogravimetric analysis, cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy. The initial VO@PEDOT composite has layered nanosheets structure with thickness of about 30–80 nm, which are assembled into wavy agglomerated thicker layers of up to 0.3–0.6 μm. The phase composition of the samples was determined by XRD analysis which confirmed lamellar structure of vanadium oxide V 10O 24∙12H 2O with interlayer distance of about 13.6 Å. The VO@PEDOT composite demonstrates excellent electrochemical performance, reaching specific capacities of up to 390 mA∙h∙g −1 at 0.3 A∙g −1. Moreover, the electrodes retain specific capacity of 100 mA∙h∙g −1 at a high current density of 20 A∙g −1. The phase transformations of VO@PEDOT electrodes during the cycling were studied at different degrees of charge/discharge by using ex situ XRD measurements. The results of ex situ XRD allow us to conclude that the reversible zinc ion intercalation occurs in stable zinc pyrovanadate structures formed during discharge.

AB - In this work the nanocomposite of vanadium oxide with conducting polymer poly(3,4-ethylenedioxythiophene) (VO@PEDOT) was obtained by microwave-assisted hydrothermal synthesis. The detailed study of its structural and electrochemical properties as cathode of aqueous zinc-ion battery was performed by scanning electron microscopy, energy dispersive X-ray analysis, X-ray diffraction analysis, X-ray photoelectron spectroscopy, thermogravimetric analysis, cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy. The initial VO@PEDOT composite has layered nanosheets structure with thickness of about 30–80 nm, which are assembled into wavy agglomerated thicker layers of up to 0.3–0.6 μm. The phase composition of the samples was determined by XRD analysis which confirmed lamellar structure of vanadium oxide V 10O 24∙12H 2O with interlayer distance of about 13.6 Å. The VO@PEDOT composite demonstrates excellent electrochemical performance, reaching specific capacities of up to 390 mA∙h∙g −1 at 0.3 A∙g −1. Moreover, the electrodes retain specific capacity of 100 mA∙h∙g −1 at a high current density of 20 A∙g −1. The phase transformations of VO@PEDOT electrodes during the cycling were studied at different degrees of charge/discharge by using ex situ XRD measurements. The results of ex situ XRD allow us to conclude that the reversible zinc ion intercalation occurs in stable zinc pyrovanadate structures formed during discharge.

KW - aqueous zinc-ion battery

KW - cathode

KW - composite

KW - electrochemical performance

KW - energy storage

KW - poly(3,4-ethylenedioxythiophene)

KW - vanadium oxide

UR - https://www.mdpi.com/2079-4991/12/21/3896

UR - https://www.mendeley.com/catalogue/fbb9cae4-a125-3f01-b306-46958132811f/

UR - http://www.scopus.com/inward/record.url?scp=85141842702&partnerID=8YFLogxK

U2 - 10.3390/nano12213896

DO - 10.3390/nano12213896

M3 - Article

C2 - 36364672

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 21

M1 - 3896

ER -