Celtec-V: a polybenzimidazole-based membrane for the direct methanol fuel cell
Gubler, Lorenz, Kramer, Denis, Belack, Jörg, Ünsal, Ömer, Schmidt, Thomas J. and Scherer, Günther G. (2007) Celtec-V: a polybenzimidazole-based membrane for the direct methanol fuel cell. Journal of The Electrochemical Society, 154, (9), B981-B987. (doi:10.1149/1.2754078).
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Celtec-V is a proton exchange membrane based on polybenzimidazole (PBI) comprising an interpenetrating network of polyvinylphosphonic acid designed for application in the direct methanol fuel cell. The properties and fuel cell performance of Celtec-V are investigated and compared against a Nafion 117 standard. It is shown that with the PBI-based membrane, fuel cell performance can be sustained to higher methanol feed concentration at around half the methanol crossover rate. Above 1.0 M methanol, Celtec-V outperforms Nafion 117. Furthermore, lower water permeation is observed, with Celtec-V having an electro-osmotic drag coefficient of around 1 compared to a value of 4-5 for Nafion 117. Room for improvement is identified in the ohmic resistance of the membrane and the cathode-membrane interface, where higher losses are observed at increasing current density.
|Keywords:||direct methanol fuel cells, proton exchange membrane fuel cells, current density|
|Subjects:||Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TP Chemical technology
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
|Date Deposited:||13 Jun 2011 10:19|
|Last Modified:||13 Jun 2011 10:19|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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