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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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The effects of temperature on the performance of electrochemical double layer capacitors

Fletcher, S. I. and Sillars, F. B. and Carter, R. C. and Cruden, A. J. and Mirzaeian, M. and Hudson, N. E. and Parkinson, J. A. and Hall, P. J. and Hall, Peter (2010) The effects of temperature on the performance of electrochemical double layer capacitors. Journal of Power Sources, 195 (21). pp. 7484-7488. ISSN 0378-7753

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Abstract

An electrochemical double layer capacitor test cell containing activated carbon xerogel electrodes and ionic liquid electrolyte was tested at 15, 25 and 40 degrees C to examine the effect of temperature on electrolyte resistance (R-S) and equivalent series resistance (ESR) measured using impedance spectroscopy and capacitance using charge/discharge cycling. A commercial 10 F capacitor was used as a comparison. Viscosity, ionic self-diffusion coefficients and differential scanning calorimetry measurements were used to provide an insight into the behaviour of the 1,2-dimethy1-3-propylimdazolium electrolyte. Both R-S and ESR decreased with increasing temperature for both capacitors. Increasing the temperature also increased the capacitance for both the test cell and the commercial capacitor but proportionally more for the test cell. An increase in temperature decreased the ionic liquid electrolyte viscosity and increased the self-diffusion coefficients of both the anion and the cation indicating an increase in dissociation and increase in ionic mobility. (C) 2010 Elsevier B.V. All rights reserved.