Investigation of direct methanol fuel cell performance of sulfonated polyimide membrane

Jung Min Song, Kenji Miyatake, Hiroyuki Uchida, Masahiro Watanabe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


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 languageEnglish
Pages (from-to)4497-4504
Number of pages8
JournalElectrochimica Acta
Issue number21
Publication statusPublished - 2006 Jun 1
Externally publishedYes


  • Direct methanol fuel cell (DMFC)
  • Methanol crossover
  • Sulfonated polyimide (SPI)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry


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