Electrochemical testing of ultraporous membranes as separators in mild aqueous supercapacitors

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DOIResolve DOI: http://doi.org/10.1149/2.020207jes
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TypeArticle
Proceedings titleJournal of the Electrochemical Society
ConferenceMeeting of The Electrochemical Society, May 1–6, 2011, Montreal, QC, Canada
ISSN0013-4651
Volume159
Issue7
PagesA929A936
SubjectBetter performance; Electrochemical techniques; Electrochemical testing; Equivalent series resistance; Frequency ranges; Medium-frequency range; Super capacitor; Synergetic effect; Capacitors; Electric resistance; Pore size; Separators
AbstractSeveral commercially available separators as well as novel ultraporous electrospun nonwovens were evaluated in mild aqueous supercapacitor cells, using conventional electrochemical techniques. A special laboratory test-cell was designed and fabricated to accurately control the pressure applied to the stack. It was shown that the separator layer not only affects the equivalent series resistance (ESR) of the cell (high frequency range) but has also an influence on its time constant (medium frequency range). Both ESR and time constant were found to be directly proportional to the separator thickness. Higher porosity and higher pore size were found to lead to better performance, especially at higher power demand. The electrospun separators outperformed the other separator structures in a disruptive manner, most probably due to a synergetic effect of higher porosity and higher pore size. © 2012 The Electrochemical Society.
Publication date
LanguageEnglish
AffiliationAutomotive and Surface Transportation; National Research Council Canada
Peer reviewedYes
NPARC number21270126
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Record identifier13efdd8f-86d2-4edc-87f5-4eeb0e7e6d66
Record created2014-01-03
Record modified2016-05-09
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