Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 17, Issue 3, Pages 450-454Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2010.10.025
Keywords
Beer lees; Activated carbon; Adsorption energy distribution; Surface functional groups; Electrical double layer capacitor
Funding
- Korea Research Foundation [2008-2735]
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Beer lees precursor is chosen to prepare activated carbons having different physical and chemical properties. The beer lees-based activated carbons (BL-ACs) are characterized by N-2 adsorption/desorption isotherms, adsorption energy distributions (AEDs), and X-ray photoelectric spectroscopy (XPS). Furthermore the electrochemical properties of the BL-ACs are assessed using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and constant current charge/discharge method. The maximum specific capacitance (about 188 F/g at discharge current of I mA/cm(2)) is obtained in 0.1 M H2SO4 electrolyte solution, which is a relatively low electrolyte concentration. The overall results suggest that the BL-ACs are good candidates for EDLC electrode materials. (C) 2011 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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