Preparation of highly porous binderless activated carbon electrodes from fibres of oil palm empty fruit bunches for application in supercapacitors
Autor: | Ibrahim Abu Talib, Awitdrus Awitdrus, Mohamad Deraman, Rakhmawati Farma, B.N.M. Dollah, S. A. Hashmi, M. M. Ishak, Jamballi G. Manjunatha, Erman Taer, N. H. Basri |
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Rok vydání: | 2012 |
Předmět: |
Environmental Engineering
Materials science Time Factors Nitrogen chemistry.chemical_element Bioengineering Arecaceae medicine Electrochemistry Specific energy Biomass Monolith Waste Management and Disposal Electrodes Supercapacitor geography geography.geographical_feature_category Waste management Renewable Energy Sustainability and the Environment General Medicine Carbon Dioxide Carbon Dielectric spectroscopy Chemical engineering chemistry Dielectric Spectroscopy Fruit Electrode Cyclic voltammetry Activated carbon medicine.drug |
Zdroj: | Bioresource technology. 132 |
ISSN: | 1873-2976 |
Popis: | Fibres from oil palm empty fruit bunches, generated in large quantities by palm oil mills, were processed into self-adhesive carbon grains (SACG). Untreated and KOH-treated SACG were converted without binder into green monolith prior to N2-carbonisation and CO2-activation to produce highly porous binderless carbon monolith electrodes for supercapacitor applications. Characterisation of the pore structure of the electrodes revealed a significant advantage from combining the chemical and physical activation processes. The electrochemical measurements of the supercapacitor cells fabricated using these electrodes, using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge techniques consistently found that approximately 3h of activation time, achieved via a multi-step heating profile, produced electrodes with a high surface area of 1704m(2)g(-1) and a total pore volume of 0.889cm(3)g(-1), corresponding to high values for the specific capacitance, specific energy and specific power of 150Fg(-1), 4.297Whkg(-1) and 173Wkg(-1), respectively. |
Databáze: | OpenAIRE |
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