TY - JOUR
T1 - EQCM study of redox properties of PEDOT/MnO2 composite films in aqueous electrolytes
AU - Нижегородова, Александра Олеговна
AU - Елисеева, Светлана Николаевна
AU - Толстопятова, Елена Геннадьевна
AU - Láng, G.G.
AU - Zalka, D.
AU - Ujvári, M.
AU - Кондратьев, Вениамин Владимирович
N1 - Funding Information:
Funding information This study received support from the Russian Foundation for Basic Research (grant no. 16-03-00457) and the Hungarian National Research, Development and Innovation Office – NKFI-OTKA (grants nos. K 109036 and VEKOP-2.3.2-16-2017-00013, co-financed by the European Regional Development Fund).
PY - 2018/8
Y1 - 2018/8
N2 - Electrochemical behavior of poly-3,4-ethylenedioxythiophene composites with manganese dioxide (PEDOT/MnO
2) has been investigated by cyclic voltammetry and electrochemical quartz crystal microbalance at various component ratios and in different electrolyte solutions. The electrochemical formation of PEDOT film on the electrode surface and PEDOT/MnO
2 composite film during the electrochemical deposition of manganese dioxide into the polymer matrix was gravimetrically monitored. The mass of manganese dioxide deposited into PEDOT at different time of electrodeposition and apparent molar mass values of species involved into mass transfer during redox cycling of PEDOT/MnO
2 composites were evaluated. It was found that during the redox cycling of PEDOT/MnO
2 composite films with various MnO
2 content, the oppositely directed fluxes of counterions (anions and cations) occur, resulting in a change of the slope of linear parts of the Δf–E plots with changing the mass fraction of MnO
2 in the composite film. Rectangular shape of cyclic voltammograms of PEDOT/MnO
2 composites with different loadings of manganese dioxide was observed, which is characteristic of the pseudocapacitive behavior of the composite material. Specific capacity values of PEDOT/MnO
2 composites obtained from cyclic voltammograms were about 169 F g
−1. The specific capacity, related to the contribution of manganese dioxide component, was about 240 F g
−1.
AB - Electrochemical behavior of poly-3,4-ethylenedioxythiophene composites with manganese dioxide (PEDOT/MnO
2) has been investigated by cyclic voltammetry and electrochemical quartz crystal microbalance at various component ratios and in different electrolyte solutions. The electrochemical formation of PEDOT film on the electrode surface and PEDOT/MnO
2 composite film during the electrochemical deposition of manganese dioxide into the polymer matrix was gravimetrically monitored. The mass of manganese dioxide deposited into PEDOT at different time of electrodeposition and apparent molar mass values of species involved into mass transfer during redox cycling of PEDOT/MnO
2 composites were evaluated. It was found that during the redox cycling of PEDOT/MnO
2 composite films with various MnO
2 content, the oppositely directed fluxes of counterions (anions and cations) occur, resulting in a change of the slope of linear parts of the Δf–E plots with changing the mass fraction of MnO
2 in the composite film. Rectangular shape of cyclic voltammograms of PEDOT/MnO
2 composites with different loadings of manganese dioxide was observed, which is characteristic of the pseudocapacitive behavior of the composite material. Specific capacity values of PEDOT/MnO
2 composites obtained from cyclic voltammograms were about 169 F g
−1. The specific capacity, related to the contribution of manganese dioxide component, was about 240 F g
−1.
KW - Composite materials
KW - Cyclic voltammetry
KW - Electrochemical quartz crystal microbalance
KW - Manganese dioxide
KW - Mass transport
KW - Poly-3,4-ethylenedioxythiophene
KW - Compositematerials
KW - BEHAVIOR
KW - PERFORMANCE
KW - AMORPHOUS MNO2
KW - ELECTRODES
KW - QUARTZ-CRYSTAL MICROBALANCE
KW - POLY-3,4-ETHYLENEDIOXYTHIOPHENE FILMS
KW - SOLVENT
KW - CONDUCTING-POLYMER
KW - ELECTROCHEMICAL CAPACITORS
KW - SUPERCAPACITOR
UR - http://www.scopus.com/inward/record.url?scp=85044306381&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/eqcm-study-redox-properties-pedotmno2composite-films-aqueous-electrolytes
U2 - 10.1007/s10008-018-3950-y
DO - 10.1007/s10008-018-3950-y
M3 - Article
VL - 22
SP - 2357
EP - 2366
JO - Journal of Solid State Electrochemistry
JF - Journal of Solid State Electrochemistry
SN - 1432-8488
IS - 8
ER -