Journal
MATERIALS
Volume 13, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/ma13204658
Keywords
biomass-derived activated carbons; pyrolysis; activation process; energy storage; electrochemical capacitors
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Funding
- statutory activity funds of Gdansk University of Technology, Earmarked subsidy for maintaining research potential [4914/E-359/S/2018]
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In this work, we present the preparation and characterization of biomass-derived activated carbon (AC) in view of its application as electrode material for electrochemical capacitors. Porous carbons are prepared by pyrolysis of chestnut seeds and subsequent activation of the obtained biochar. We investigate here two activation methods, namely, physical by CO2 and chemical using KOH. Morphology, structure and specific surface area (SSA) of synthesized activated carbons are investigated by Brunauer-Emmett-Teller (BET) technique and scanning electron microscopy (SEM). Electrochemical studies show a clear dependence between the activation method (influencing porosity and SSA of AC) and electric capacitance values as well as rate capability of investigated electrodes. It is shown that well-developed porosity and high surface area, achieved by the chemical activation process, result in outstanding electrochemical performance of the chestnut-derived porous carbons.
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