Abstract
Sulfonated polyimide (SPI) membranes have been evaluated as electrolyte membranes in direct methanol fuel cells (DMFCs). The membrane-electrode assembly (MEA) was made by hot-pressing the membrane, an anode and a cathode, catalyzed with PtRu/CB (PtRu dispersed on carbon black) and Pt/CB bound with Nafion® ionomer, respectively. The performance of the cell based on SPI was compared with that of Nafion® 112 in various operation conditions such as cell temperature (Tcell), cathode relative humidity (RH), and methanol concentration (CMeOH). The methanol crossover at the cell based on SPI was a half of Nafion® 112, resulting in the improved cell efficiency. Advantage of the use of SPI became much distinctive from the conventional Nafion® 112 when the DMFC was operated at a higher Tcell or a higher CMeOH.
Original language | English |
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Pages (from-to) | 4497-4504 |
Number of pages | 8 |
Journal | Electrochimica Acta |
Volume | 51 |
Issue number | 21 |
DOIs | |
Publication status | Published - 2006 Jun 1 |
Externally published | Yes |
Keywords
- Direct methanol fuel cell (DMFC)
- Methanol crossover
- Sulfonated polyimide (SPI)
ASJC Scopus subject areas
- Chemical Engineering(all)
- Electrochemistry