Synthesis of Biomass-Based Porous Carbon Materials For Supercapacitors

Ekinci E., Ekinci M. S.

4th Bioenergy Studies Symposium, Ankara, Turkey, 26 - 27 May 2022

  • Publication Type: Conference Paper / Summary Text
  • City: Ankara
  • Country: Turkey
  • Gazi University Affiliated: Yes


Biomass is the most abundant and best utilized renewable carbon resource on earth. The direct conversion of biomass into porous carbon materials offers a promising approach to energy storage applications. Energy storage systems have become more important in recent years in order to address the concerns of fossil energy depletion and global warming. Supercapacitors, as one type of important energy storage device, have become attractive due to their longer cycle life, higher power densities, and shorter charging/discharging time compared to batteries, and exhibit great application potentials in power sources, electric vehicles, portable electronics, and so on. Porous carbon compounds have received considerable attention as electrode materials for supercapacitors.

In this study, porous carbon materials were synthesized from waste tree barks. The synthesis procedure involves four steps; first refinement of the biomass where the precursor washed to remove all impurities and then cut into small pieces, then the hydrothermal step followed by the drying step where the supercritical CO2 drying was used and the last carbonization step. XRD, SEM and FTIR techniques were used for the characterization of the synthesized materials. XRD patterns exhibits a sharp diffraction peak at about 26.6° which corresponds to the aromatic ring carbon. This is supported by the aromatic carbon bonds seen in the FTIR study. The surface appeared to be highly homogenous, according to SEM analyses. When compared to the literature, we may conclude that supercritical CO2 drying contributes significantly to the homogenous surface. Characterization studies have shown that biomass-based porous carbon is promising for supercapacitor applications.