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Nanoporous carbon-based electrodes for high strain ionomeric bending actuators
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry. (strukturkemi)
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2009 (English)In: Smart materials and structures (Print), ISSN 0964-1726, E-ISSN 1361-665X, Vol. 18, no 9, 095028- p.Article in journal (Refereed) Published
Abstract [en]

Ionic polymer metal composites (IPMCs) are electroactive material devices that bend at low applied voltage (1–4 V). Inversely, a voltage is generated when the materials are deformed, which makes them useful both as sensors and actuators. In this paper, we propose two new highly porous carbon materials as electrodes for IPMC actuators, generating a high specific area, and compare their electromechanical performance with recently reported RuO2 electrodes and conventional IPMCs. Using a direct assembly process (DAP), we synthesize ionic liquid (Emi-Tf) actuators with either carbide-derived carbon (CDC) or coconut-shell-based activated carbon-based electrodes. The carbon electrodes were applied onto ionic liquid-swollen Nafion membranes using a direct assembly process. The study demonstrates that actuators based on carbon electrodes derived from TiC have the greatest peak-to-peak strain output, reaching up to 20.4 mε (equivalent to>2%) at a 2 V actuation signal, exceeding that of the RuO2 electrodes by more than 100%. The electrodes synthesized from TiC-derived carbon also exhibit significantly higher maximum strain rate. The differences between the materials are discussed in terms of molecular interactions and mechanisms upon actuation in the different electrodes.

Place, publisher, year, edition, pages
IOP Publishing , 2009. Vol. 18, no 9, 095028- p.
National Category
Chemical Sciences
Research subject
Inorganic Chemistry
URN: urn:nbn:se:uu:diva-120131DOI: 10.1088/0964-1726/18/9/095028ISI: 000269158500028OAI: oai:DiVA.org:uu-120131DiVA: diva2:302630
Available from: 2010-03-08 Created: 2010-03-08 Last updated: 2016-05-15Bibliographically approved

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Brandell, Daniel
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