Nuclear magnetic resonance microimaging investigation of membrane electrode assembly of fuel cells: morphology and solvent dynamics

Zhen Wu, Chien Shun Wu, Peter Po Jen Chu, Shangwu Ding

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The structure and solvent (water, methanol, etc.) dynamics of a number of fuel membrane electrode assembly (MEA) samples are studied with nuclear magnetic resonance microimaging with spatial resolution of tens of micrometers. The micrometer-scale inhomogeneity of the samples is observed and confirmed with various weighting methods. In particular, diffusion coefficients at different positions in MEA are clearly differentiated. Furthermore, chemical shift selection imaging enables one to investigate the spatial distribution and dynamics of individual chemical groups. These types of information offer us insights into the working principle of fuel cell and pave the way to in situ studies of operating fuel cells.

Original languageEnglish
Pages (from-to)871-878
Number of pages8
JournalMagnetic Resonance Imaging
Volume27
Issue number6
DOIs
StatePublished - Jul 2009

Keywords

  • Chemical shift selection
  • Diffusion
  • Fuel cell
  • Magnetic resonance microimaging
  • Membrane electrode assembly (MEA)
  • Morphology
  • Relaxation
  • Weighting

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