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  Influence of the size and shape of silica nanoparticles on the properties and degradation of a PBI-based high temperature polymer electrolyte membrane

Ossiander, T., Heinzl, C., Gleich, S., Schönberger, F., Völk, P., Welsch, M. T., et al. (2014). Influence of the size and shape of silica nanoparticles on the properties and degradation of a PBI-based high temperature polymer electrolyte membrane. Journal of Membrane Science, 454, 12-19. doi:10.1016/j.memsci.2013.12.004.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-BBFD-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-6E65-3
Genre: Journal Article

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 Creators:
Ossiander, T.1, Author              
Heinzl, C.2, Author              
Gleich, Stephan3, Author              
Schönberger, Frank4, Author              
Völk, P.4, Author              
Welsch, Markus T.4, Author              
Scheu, Christina5, Author              
Affiliations:
1Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 11, 81377 Munich, Germany , ou_persistent22              
2Department of Chemistry, LMU Munich, Germany , ou_persistent22              
3Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 11, 81377 Munich, Germany, ou_persistent22              
4Elcomax GmbH, Bayerwaldstrasse 3, D-81737 Munich, Germany, ou_persistent22              
5Department of Chemistry, University of Munich (LMU), Butenandtstrasse 5-13, 81377 Munich, Germany, ou_persistent22              

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Free keywords: PEM FUEL-CELLS; COMPOSITE MEMBRANES; NANOCOMPOSITE MEMBRANES; POLYBENZIMIDAZOLE; CONDUCTIVITY; CONDUCTORS; REDUCTIONEngineering; Polymer Science; Polybenzimidazol; Fuel cell; Composite membrane; Durability; Silica nanoparticles;
 Abstract: The life Lime stability of membrane material is one of the major parameters regarding reliability of high temperature polymer electrolyte membrane fuel cells. Present work has improved fuel cell durability and chemical stability by incorporating cross-linked silica particles in phosphoric acid doped poly(2,2`-m-phenylene-5,5'-bibenzimidazole) membranes. Three different silica particle contents were generated in membranes by in-situ sol-gel reaction from the precursor tetraethoxy silane and cross-linked to the polymer chains by using (3-glycidoxypropyl)-methyldiethoxysilane. The size, shape and distribution of the silica nanoparticles were examined by transmission electron microscopy. The amorphous characteristics and the chemical composition of the silica particles were investigated using X-ray diffraction, electron diffraction and energy dispersive X-ray spectroscopy. Detailed statistical analysis showed that by increasing the tetraethoxy silane content, the particle size was reduced while the amount of particles was increased. Ex-situ membrane characterization and in-situ membrane electrode assembly testing revealed a high influence of the silica content on the mechanical stability and start-stop-cycling behavior. The improved lifetime durability of the organic-inorganic composite membrane was proven in comparison to the pure polybenzimidazole membrane in membrane electrode assemblies over 1300 h under constant fuel cell operation in reformate. (c) 2013 Elsevier B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2014-03-15
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Degree: -

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Title: Journal of Membrane Science
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 454 Sequence Number: - Start / End Page: 12 - 19 Identifier: ISSN: 0376-7388
CoNE: https://pure.mpg.de/cone/journals/resource/954925525807