Suppression of radical attack in polymer electrolyte membranes using a vinyl polymer blend interlayer with low oxygen permeability

Zulfi Al Rasyid Gautama, Yasir Arafat Hutapea, Byungchan Hwang, Junko Matsuda, Albert Mufundirwa, Takeharu Sugiyama, Miho Ariyoshi, Shigenori Fujikawa, Stephen Matthew Lyth, Akari Hayashi, Kazunari Sasaki, Masamichi Nishihara

研究成果: ジャーナルへの寄稿学術誌査読

抄録

Decomposition of polymer electrolyte membranes (PEMs) by radical species is a significant issue related to the chemical durability of polymer electrolyte fuel cells (PEFCs). A major contributor to radical formation is the oxygen crossover through the membrane from cathode to anode. Therefore, suppression of oxygen diffusion through the PEM is predicted to effectively mitigate the chemical degradation via radical formation. To confirm this, a simple high oxygen barrier PEM is prepared by sandwiching a thin gas barrier interlayer in between two Nafion 211 membranes. The interlayer consists of poly (vinyl alcohol) (PVA) and poly (vinyl sulfonic acid) (PVS) with various molar ratio. The sandwich PEM can show 286 times lower oxygen permeability than Nafion 212 membrane, which corresponds to 1.7 times longer survival time than Nafion 212 in a chemically accelerated stress test for PEMs known as open circuit voltage (OCV) holding test. Furthermore, the SEM image of the sandwich PEM cross-section shows that the interlayer could survive the OCV holding test despite its lower resistance against radical attack. The results in this study indicate that the addition of high oxygen barrier interlayer can reduce radical formation in PEFC and improve chemical durability.

本文言語英語
論文番号120734
ジャーナルJournal of Membrane Science
658
DOI
出版ステータス出版済み - 9月 15 2022

!!!All Science Journal Classification (ASJC) codes

  • 生化学
  • 材料科学(全般)
  • 物理化学および理論化学
  • ろ過および分離

フィンガープリント

「Suppression of radical attack in polymer electrolyte membranes using a vinyl polymer blend interlayer with low oxygen permeability」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル