Electrochemical properties of PEDOT/WO3 composite films for high performance supercapacitor application

D.V. Zhuzhelskii, E.G. Tolstopjatova, S.N. Eliseeva, A.V. Ivanov, Shoulei Miao , V.V. Kondratiev

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

28 Цитирования (Scopus)

Аннотация

Tungsten oxide was electrochemically deposited from a metastable acidic solution of isopolytungstate on glassy carbon electrodes coated by the films of a conducting polymer poly-3,4-ethylenedioxythiophene (PEDOT). The formation of PEDOT/WO 3 composite films during electrochemical deposition of tungsten oxide into the polymer matrix was gravimetrically monitored by EQCM. The morphology of WO 3 deposits was studied using SEM, TEM and EDX analysis, including element mapping and depth concentration profile of main elements. SEM and TEM images of PEDOT/WO 3 composites show disperse distribution of WO 3 precipitates in the porous matrix of PEDOT, possessing high surface area and pore volume, effective for charge transport. Electrochemical behavior of PEDOT/WO 3 was investigated in 0.5 M H 2 SO 4 by cyclic voltammetry, galvanostatic charge-discharge method and electrochemical impedance spectroscopy. The WO 3 component in the obtained PEDOT/WO 3 composite electrodes exhibited high specific capacitance of 689 F g −1 in the potential range −0.3–0.0 V. The work presents a simple approach for the synthesis of PEDOT/WO 3 composites with high values of specific capacitance. The obtained results indicate that PEDOT/WO 3 composite could be a promising electrode material for supercapacitor applications.

Язык оригиналаанглийский
Страницы (с-по)182-190
ЖурналElectrochimica Acta
Том299
Ранняя дата в режиме онлайн4 янв 2019
DOI
СостояниеОпубликовано - 10 мар 2019

Предметные области Scopus

  • Химическая технология (все)
  • Электрохимия

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