| Title: | Celtec-V: a polybenzimidazole-based membrane for the direct methanol fuel cell | Authors: | Gubler, Lorenz Kramer, Denis Belack, Jörg Ünsal, Ömer Schmidt, Thomas Justus Scherer, Günther G. |
Language: | eng | Keywords: | direct methanol fuel cells;proton exchange membrane fuel cells;current density | Issue Date: | 30-Jul-2007 | Publisher: | Electrochemical Society (ECS) IOP Publishing |
Document Type: | Article | Journal / Series / Working Paper (HSU): | Journal of the Electrochemical Society : JES | Volume: | 154 | Issue: | 9 | Publisher Place: | Pennington, NJ Bristol |
Abstract: | 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. |
Organization Units (connected with the publication): | Electrochemistry Laboratory, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland | ISSN: | 0013-4651 | Publisher DOI: | 10.1149/1.2754078 |
| Appears in Collections: | 6 - Publication references (without fulltext) of your publications before HSU |
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