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

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number120734
JournalJournal of Membrane Science
Volume658
DOIs
Publication statusPublished - Sep 15 2022

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Fingerprint

Dive into the research topics of 'Suppression of radical attack in polymer electrolyte membranes using a vinyl polymer blend interlayer with low oxygen permeability'. Together they form a unique fingerprint.

Cite this