Physical and electrochemical properties of supercapacitor electrodes derived from carbon nanotube and biomass carbon

R. Farma, Mohamad Deraman, Awitdrus, I. A. Talib, Ramli Omar, J. G. Manjunatha, M. M. Ishak, N. H. Basri, B. N M Dolah

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

Green monoliths (GMs) were prepared from mixtures of KOH (5% by weight), carbon nanotubes (5%) and self-adhesive carbon grains (90%) from oil palm empty fruit bunch fibers. The GMs were carbonized up to 600, 700 and 800°C under an N2 gas environment, and activated by CO2 gas at 800°C for one hour to produce activated carbon monoliths (ACMs), designated as ACM6, ACM7 and ACM8, respectively. The characterization of the ACMs showed a notable effect of the carbonization temperature on the structure, microstructure, electrical conductivity and porosity of the ACMs. Consequently, three independent methods, galvanostatic charge-discharge, cyclic voltammetry and electrochemical impedance spectroscopy, used for the electrochemical characterization of supercapacitor cells fabricated using the ACMs as their electrodes, consistently found that the ACM7 and ACM8 cells have higher specific capacitance (77 Fg-1 and 85 Fg-1, respectively), specific energy (2.2 Wh kg-1 and 2.1 Wh kg-1, respectively) and specific power (156 W kg-1 and 161 W kg-1, respectively) compared to the ACM6 cell. These results suggest that carbonization should be performed at temperatures closer or equal to the activation temperature for the preparation of supercapacitor electrodes composed of biomass precursors.

Original languageEnglish
Pages (from-to)257-273
Number of pages17
JournalInternational Journal of Electrochemical Science
Volume8
Issue number1
Publication statusPublished - Jan 2013

Fingerprint

Carbon Nanotubes
Electrochemical properties
Activated carbon
Carbon nanotubes
Biomass
Carbon
Physical properties
Electrodes
Carbonization
Gases
Palm oil
Fruits
Electrochemical impedance spectroscopy
Temperature
Cyclic voltammetry
Adhesives
Capacitance
Porosity
Chemical activation
Microstructure

Keywords

  • Activated carbon monolith
  • Carbon nanotube
  • Porosity
  • Self-adhesive carbon grains
  • Supercapacitor electrode

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Physical and electrochemical properties of supercapacitor electrodes derived from carbon nanotube and biomass carbon. / Farma, R.; Deraman, Mohamad; Awitdrus; Talib, I. A.; Omar, Ramli; Manjunatha, J. G.; Ishak, M. M.; Basri, N. H.; Dolah, B. N M.

In: International Journal of Electrochemical Science, Vol. 8, No. 1, 01.2013, p. 257-273.

Research output: Contribution to journalArticle

Farma, R. ; Deraman, Mohamad ; Awitdrus ; Talib, I. A. ; Omar, Ramli ; Manjunatha, J. G. ; Ishak, M. M. ; Basri, N. H. ; Dolah, B. N M. / Physical and electrochemical properties of supercapacitor electrodes derived from carbon nanotube and biomass carbon. In: International Journal of Electrochemical Science. 2013 ; Vol. 8, No. 1. pp. 257-273.
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