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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1149/1.2754078
ISSNs: 0013-4651 (print)
Keywords: direct methanol fuel cells, proton exchange membrane fuel cells, current density

Organisations: Engineering Mats & Surface Engineerg Gp
ePrint ID: 189821
Date :
Date Event
30 July 2007Published
Date Deposited: 13 Jun 2011 10:19
Last Modified: 18 Apr 2017 02:01
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/189821

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