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Asymmetric and symmetric supercapacitors based on polypyrrole and activated carbon electrodes
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials. (Nanoteknologi och funktionella material)
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2015 (English)In: Synthetic metals, ISSN 0379-6779, Vol. 203, 192-199 p.Article in journal (Refereed) Published
Abstract [en]

Abstract Supercapacitors were prepared using either two polypyrrole (PPy) composite electrodes or one PPy composite and one activated carbon electrode. The PPy composite electrodes were either freestanding paper-like sheets or PPy films printed on graphite ink coated aluminium/PET laminate substrates, using Cladophora algae derived cellulose as the substrate or binder, respectively. The specific capacitance of the PPy electrodes was found to be about 200 F g−1 depending on the manufacturing method, yielding supercapacitors with capacitances between 0.45 and 3.8 F and energy efficiencies of over 90%. For an asymmetric device with activated carbon positive electrode and PPy negative electrode a capacitance loss of 5% was seen after 14300 cycles.

Place, publisher, year, edition, pages
2015. Vol. 203, 192-199 p.
Keyword [en]
Supercapacitor, Activated carbon, Polypyrrole, Conductive polymer, Asymmetric
National Category
Nano Technology
Research subject
Engineering Science with specialization in Nanotechnology and Functional Materials
URN: urn:nbn:se:uu:diva-246167DOI: 10.1016/j.synthmet.2015.02.034ISI: 000353097600027OAI: oai:DiVA.org:uu-246167DiVA: diva2:792109
Available from: 2015-03-03 Created: 2015-03-03 Last updated: 2015-05-18Bibliographically approved

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Publisher's full texthttp://www.sciencedirect.com/science/article/pii/S0379677915001010

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Sjödin, MartinNyholm, LeifStrömme, Maria
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