Journal
ELECTROCHIMICA ACTA
Volume 52, Issue 7, Pages 2498-2505Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2006.08.061
Keywords
activated carbon; KOH activation; CO2 gasification; surface oxygen functional groups; electric double-layer capacitor
Categories
Ask authors/readers for more resources
The micropores and surface oxygen functional groups of KOH-activated carbons were respectively extended and desorbed by the gasification of CO2 during the activation process of chars derived from pistachio shells. These activated carbons (ACs) were found to exhibit ideal capacitive performances (i.e., a rectangular shape of CVs at a wide range of scan rates, high power property, and excellent reversibility) in aqueous electrolytes for electric double-layer capacitors. Although the specific capacitance of these ACs measured at a low scan rate (25 mV s(-1)) is decreased with reducing the density of surface functional groups, the ideal capacitive characteristics can be maintained at a much higher scan rate (300 mV s(-1)) when the CO2 gasification time is equal to or longer than 30 min because of the relatively high proportion of mesopores. (c) 2006 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available