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Effect of solvent exchange on the properties of carbon xerogel and carbon xerogel/polypyrrole composites for supercapacitors

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(6), pp.1287-1308
  • DOI : 10.1007/s42823-021-00254-1
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : January 31, 2021
  • Accepted : April 22, 2021
  • Published : December 1, 2021

Samancı Meryem 1 Daş Elif 1 Yurtcan Ayşe Bayrakçeken 1

1Atatürk University

Accredited

ABSTRACT

Carbon xerogels (CXs) with three-dimensional (3D) structure, unusual surface, physical, electrical and mechanical properties and their electrically conductive polymer polypyrrole (PPy) composites were synthesized as electrode materials for supercapacitors. The efect of diferent resorcinol/formaldehyde (R/C) ratios, whether solvent exchange with or without acetone and polypyrrole addition on the physicochemical (FTIR, XRD, BET, SEM and TGA) and electrochemical properties (CV, 1000 cycles) of the synthesized materials were investigated. It was observed that the R/C ratio and the solvent exchange process prior to drying afect the specifc surface areas and the pore size distributions, thereby positively afecting the specifc capacitance. PPy flm thickness was observed to be efective in the specifc capacitance of the electrode in PPy composite synthesis. Among the synthesized materials, the highest specifc capacitance values belong to polypyrrole/carbon xerogel composites. As a result of the analysis and calculations, it was found that the highest specifc capacitance belongs to CX2/PPy composite with 599 Fg−1 at 5 mVs−1. CX2/PPy composite has been found to have a capacitance retention rate of 80.30% at the end of 1000 cycles.

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