The development of materials for carbon double-layer supercapacitors

DesRoches, Derrick (2010) The development of materials for carbon double-layer supercapacitors. Masters thesis, Memorial University of Newfoundland.

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Abstract

The electrochemical properties of porous carbon electrodes were tested by both cyclic voltammetry and impedance spectroscopy. By varying the type/amount of binder (Nafion, Teflon, sol-gel) different capacitance values and mass loadings were observed. As these electrodes were being developed for supercapacitor applications, the mass loading is important (i.e. mass a energy). Also the resistances associated with these electrodes were greatly reduced by a new cell design that almost eliminated the solution resistance. Different forms of carbon were tested including both powders and a fabric variety; the fabric electrodes exhibited a higher surface area, as well as much more mechanical stability. In the carbon powder work, it was found that the carbon Black Pearls 2000 was best for the specific capacitance (321 F/g) and it was optimized (higher specific capacitance, lower resistance) by the addition of 1% Nafion, while the total capacitance was optimized by a combination of 5% Teflon and 5% Nafion.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/9342
Item ID: 9342
Additional Information: Includes bibliographical references.
Department(s): Science, Faculty of > Chemistry
Date: 2010
Date Type: Submission
Library of Congress Subject Heading: Electrodes, Carbon; Supercapacitors

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