Journal
MATERIALS RESEARCH BULLETIN
Volume 70, Issue -, Pages 209-214Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2015.04.044
Keywords
Microporous materials; Nanostructure; Sol-gel chemistry; Energy storage
Categories
Funding
- Energy Efficiency & Resources of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government Ministry of Knowledge Economy [20122020100200]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20122020100200] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Carbon aerogel was prepared by a sol gel polymerization of resorcinol-formaldehyde (RF) method, and it was activated with CO2 to obtain activated carbon aerogel (ACA). A series of modified activated carbon aerogels (MACA-X, X=3, 6, 9, and 12 h) were then prepared by HNO3 oxidation of ACA with a variation of oxidation time (X) in order to investigate the effect of surface oxygen group on their electrochemical performance as supercapacitor electrode material. Electrochemical properties of ACA and MACA-X were measured by cyclic voltammetry, galvanostatic charge/discharge, and EIS (electrochemical impedance spectroscopy) measurements. Among the samples, MACA-6 h showed the best rate capability and the highest specific capacitance. Thus, an optimal HNO3 oxidation condition was required for the highest supercapacitive electrochemical performance of modified activated carbon aerogel. (C) 2015 Elsevier Ltd. All rights reserved.
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