Journal
CARBON
Volume 43, Issue 6, Pages 1303-1310Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2005.01.001
Keywords
porous carbon; activation; adsorption; electrochemical properties
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A large specific surface area (SSA) of carbon materials used for electrochemical double layer capacitors (EDLC) is the most important parameter leading to a large gravimetric capacitance (C-g). However, for a SSA determined with the differential functional theory (DFT) model above a value of 1200 m(2)/g the plot of C-g versus S-DFT exhibits a plateau. We suggest that this limitation of C-g can be ascribed to a space constriction for charge accommodation inside the pore walls. As a consequence, the use of extremely high surface area carbons for EDLCs may be unprofitable. (c) 2005 Elsevier Ltd. All rights reserved.
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