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Self-Discharge and Microstructure of Supercapacitors Tested at Room Temperature and at 333 K

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Abstract:

The microstructure, chemical composition and self-discharge of some retail available supercapacitors have been investigated. Standard capacities of 1.0, 0.47 and 0.1 F at a maximum potential of 5.5 V were employed in this study. Self-discharge were carried out at room temperature and close to the nominal maximum working temperature of the supercapacitors (specified for 343 K). Internal resistance of the supercapacitors were calculated using the discharge curve for room temperature and 333 K. The microstructures of the electrode powder material have been investigated using scanning electron microscopy (SEM) and chemical microanalyses employing energy dispersive X-ray analysis (EDX). A compositional and morphological evaluation of these commercial supercapacitors materials has been carried out.

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Periodical:

Materials Science Forum (Volume 802)

Pages:

427-432

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.802.427

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Online since:

December 2014

Authors:

Virgilio Russo Spena Visentini, Lia Maria Carlotti Zarpelon, Rubens Nunes Faria Jr

Keywords:

Energy Storage, Scanning Electron Microscopy, Supercapacitors Self-Discharge

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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