Performance of membrane electrode assemblies based on proton exchange membranes prepared by pre-irradiation induced grafting

Jingye Li, Akio Matsuura, Tomoyuki Kakigi, Takaharu Miura, Akihiro Oshima, Masakazu Washio

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Proton exchange membranes (PEMs) were prepared by pre-irradiation induced grafting of styrene (S) or styrene/divinylbenzene (S/DVB) into the radiation-crosslinked polytetrafluoroethylene (RX-PTFE) films and then sulfonated. The thicknesses of the obtained PEMs were lower than 20 μm and the ion exchange capacity (IEC) values were around 2 meq g-1. The surfaces of the PEMs and carbon electrodes were coated with Nafion® dispersion, and then membrane electrode assembles (MEAs) were prepared by hot-pressing them together. A MEA based on a Nafion® 112 membrane was also prepared under same procedure for comparison. The performances of the MEAs in a single cell were tested under different cell temperatures and humidifications. Electrochemical impedance spectra (EIS) were measured with ac frequencies which ranged from 100 kHz to 1 Hz at a dc density of 0.5 A cm-2. The obtained impedance curves in Nyquist representation were semicircular.

Original languageEnglish
Pages (from-to)99-105
Number of pages7
JournalJournal of Power Sources
Volume161
Issue number1
DOIs
Publication statusPublished - 2006 Oct 20

Keywords

  • Fuel cell
  • Membrane electrode assemble
  • Pre-irradiation induced grafting
  • Proton exchange membrane
  • Styrene/divinylbenzene

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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