Fabrication of function-graded proton exchange membranes by electron beam irradiation for polymer electrolyte fuel cells under nonhumidified condition

Ryota Tsuchida, Atsushi Tsukamoto, Satoshi Hiraiwa, Akihiro Oshima, Masakazu Washio

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Function-graded proton exchange membranes (G-PEMs) for polymer electrolyte fuel cells (PEFCs) are fabricated by electron beam (EB) grafting using a heterogeneous energy deposition technique. The fabricated G-PEMs have a water uptake gradient in the direction of the thickness originating from the sulfonic acid group gradient. Normal PEMs (N-PEMs), which have almost no gradient ionic groups in the membrane, are also fabricated to compare with G-PEMs. PEFC operations for comparing the fabricated G-PEMs, normal PEMs (N-PEMs), and Nafion®212 are carried out at 30 C and 60 C with dry H 2/O2 gases. It is expected that the advantages of using dry fuel gases are lower cost and a smaller size system than that is possible with a humid fuel. The fabricated G-PEMs show a higher power density than Nafion®212 and N-PEMs at 30 C, and the deterioration of the performance of fabricated G-PEMs is lower than that of Nafion ®212. These results are thought to be caused by the difference in proton transfer kinetics between the fabricated G-PEMs and those of Nafion ®212. It is therefore considered that G-PEMs not only exhibit higher performance at low temperature under nonhumidified conditions but also cost less than Nafion®212.

本文言語English
ページ(範囲)351-358
ページ数8
ジャーナルJournal of Power Sources
240
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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