Document Type thesis Author Name Suarez, Matthew URN etd-121913-200346 Title The Effect of Membrane Thickness on the Performance of PBI-Based High-Temperature Direct Methanol Fuel Cells Degree MS Department Chemical Engineering Advisors Ravindra Datta, Advisor Keywords DMFC PBI membrane thickness Date of Presentation/Defense 2013-12-20 Availability restricted
This project investigates the effect of membrane thickness on the performance and durability of a Direct Methanol Fuel Cell (DMFC) using a commercially available Celtec«P-1000 PBI-based membrane electrode assembly (MEA). The PBI-based membranes tested were the 100Ám, the standard thickness, 200Ám and 250Ám thick. With various methanol feed concentrations and cathode feeds, oxygen and air, the PBI-based MEAs were operated between 160 and 180░C with vaporized methanol feed. Results showed that the DMFC performance increased with temperature and with PBI membrane thickness. The optimal concentration for the 100Ám membrane was at 5M while the best performance with the 200Ám membrane was obtained at 3M. The 250Ám membrane looked like it could have had better performance than the 200Ám, but unfortunately experimental issues didnĺt allow completion of these results.
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