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Silica ionogels for proton transport

  • A number of ionogels - silica-ionic liquid (IL) hybrid materials - were synthesized and studied for their ionic conductivity. The materials are based on a sulfonated IL, 1-methyl-3-(3-sulfopropyl-)-imidazolium p-toluenesulfonate, [PmimSO(3)H][PTS], which contains a sulfonic acid/sulfonate group both in the IL anion and in the side chain of the IL cation. By way of the sulfonate-sulfonic acid proton transfer, the IL imparts the ionogel with a high ionic conductivity of ca. 10(-2) S cm(-1) in the as-synthesized state at 120 degrees C and 10(-3) S cm(-1) in the dry state at 120 degrees C. The ionogels are stable up to ca. 150 degrees C in dynamic thermogravimetric analysis. This suggests that these materials, which are relatively cheap and easily fabricated, could find application in fuel cells in intermediate temperature ranges where many other membrane materials are not suitable.

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Author:Emilie Delahaye, Ronald Goebel, Ruben Loebbicke, Regis Guillot, Christoph Sieber, Andreas TaubertORCiDGND
ISSN:0959-9428 (print)
Parent Title (English):Journal of materials chemistry
Publisher:Royal Society of Chemistry
Place of publication:Cambridge
Document Type:Article
Year of first Publication:2012
Year of Completion:2012
Release Date:2017/03/26
First Page:17140
Last Page:17146
Funder:MPG-CNRS; Deutsche Forschungsgemeinschaft [TA571/2-1, 7-1]; University of Potsdam; MPI of Colloids and Interfaces (Colloid Chemistry Department); MPI for Polymer Research
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert