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Effect of oxygen-containing functional groups on specific capacitance of carbon nanotube electrochemical capacitors

Aria, Adrianus I. and Guittet, Mélanie and Gharib, Morteza (2011) Effect of oxygen-containing functional groups on specific capacitance of carbon nanotube electrochemical capacitors. In: 242nd National Meeting of the American-Chemical-Society (ACS), Aug. 28–Sept. 1, 2011, Denver, CO. http://resolver.caltech.edu/CaltechAUTHORS:20130918-153901066

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Abstract

Electrochem. capacitors have numerous applications, ranging from large scale hybrid vehicles to small scale consumer electronics, with very high power d. at the cost of relatively low energy storage. A lot of works have been devoted to increase power and energy capacity as well as lifetime of such capacitors, and the use of functionalized carbon nanotube array is considered the most visible way to achieve that. We report here an approach to increase the specific capacitance of an electrochem. capacitor by simply increasing the no. of oxygenated functional groups that are attached to the carbon nanotubes. This finding shows an augmentation of nearly five orders of magnitude in the specific capacitance when the oxidn. level (oxygen /carbon at. ratio) of the nanotubes is increased from 2.5% to 7.5%. While this behavior was assessed in an aq. potassium hydroxide electrolyte, the totally opposite behavior with non polar and/or aprotic solvent is expected.


Item Type:Conference or Workshop Item (Paper)
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http://abstracts.acs.org/chem/242nm/meetingview.php?page=divisionPublisherConference Website
Additional Information:© 2011 American Chemical Society.
Group:GALCIT
Record Number:CaltechAUTHORS:20130918-153901066
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130918-153901066
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41403
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:18 Sep 2013 22:51
Last Modified:30 Sep 2016 17:35

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