Understanding the capacitance of thin composite films based on conducting polymer and carbon nanostructures in aqueous electrolytes - Publication - Bridge of Knowledge

Your account

login

Search

Understanding the capacitance of thin composite films based on conducting polymer and carbon nanostructures in aqueous electrolytes

Abstract

In this work electrochemical performance of thin composite films consisted of poly(3,4-ethylenedioxythiophene) (PEDOT), graphene oxide (GOx) and oxidized multiwalled carbon nanotubes (oxMWCNTs) is investigated in various sulphates (Li2SO4, Na2SO4, K2SO4, MgSO4) and acidic (H2SO4) electrolytes. Capacitance values, rate capability and cycling stability achieved for the composite layers are correlated with the electrolytes’ properties such as the conductivity, viscosity, cation size and pH. The highest capacitance values are achieved in acidic solution (98.6 mF cm−2 at 1 mA cm−2), whereas cycling stability is better in neutral electrolytes (88.4% of initial capacitance value after 10’000 cycles recorded for symmetric supercapacitor in 0.5 M MgSO4 solution). Diffusion controlled and non-diffusion controlled capacitance contributions are calculated and the results are discussed considering various ranges of sweep rates taken into account in the linear fitting and extrapolation of parameters.

Citations

  • 5 4

    CrossRef

  • 0

    Web of Science

  • 5 2

    Scopus

Authors (4)

Cite as

Full text

download paper
downloaded 346 times
Publication version
Accepted or Published Version
License
Creative Commons: CC-BY-NC-ND open in new tab

Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
ELECTROCHIMICA ACTA no. 383,
ISSN: 0013-4686
Language:
English
Publication year:
2021
Bibliographic description:
Cymann-Sachajdak A., Graczyk-Zajac M., Trykowski G., Wilamowska-Zawłocka M.: Understanding the capacitance of thin composite films based on conducting polymer and carbon nanostructures in aqueous electrolytes// ELECTROCHIMICA ACTA -Vol. 383, (2021), s.138356-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.electacta.2021.138356
Sources of funding:
Verified by:
Gdańsk University of Technology

seen 197 times

Recommended for you

Electrode materials for electrochemical capacitors based on poly(3,4-ethylenedioxythiophene) and functionalized multi-walled carbon nanotubes characterized in aqueous and aprotic electrolytes

2018

Reliable renewable energy – application of electrochemical capacitors for electrical energy storage

2016

Hybrid electrode materials for fast performance devices

2013

Electrochemical and photoelectrochemical properties of the interface between titania nanotubes covered by conducting polymer in aqueous by conducting polymer in aqueous electrolytes – The effect of various geometry and electrolytes concentration

2018
Meta Tags