Development of a measurement technique for current-density in PEFC using planar surface coil as a NMR signal detector (1st report, one-dimensional measurement of current-density generating in PEFC)

Yasuo Yokouchi, Kuniyasu Ogawa, Tornoyuki Haishi, Kohei Ito

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In a polymer electrolyte fuel cell (PEFC), current density through polymer electrolyte membrane (PEM) would be distributed along the electrode on membrane electrode assembly (MEA). To increase the electric power density of a PEFC, it is needed to find out some low-current density areas where electric power generation decrease due to a lack of hydrogen, flooding and so on. Therefore. a monitoring method of local current density in PEFC is required to achieve higher current density operation of a PEFC. We developed the new method to estimate the spatial distribution of current flowing through MEA in a PEFC using Nuclear-Magnetic Resonance (NMR) signal detector. The magnetic field strength induced by the current through MEA generating electric power is acquired as the frequency shift of the NMR signal by NMR signal detector. The one dimensional spatial distribution of frequency shift changing along the MEA was measured. In order to verify the method, under the assumption that the current through MEA was uniform, magnetic field strength induced by the current through GDL in a IEFC was analyzed theoretically. And then, the frequency shift at the each NMR signal detector was calculated as functions of the geometry of GDL, current and the position of the NMR signal detector. In these studies, the experimental results agree with the theoretical results.

Original languageEnglish
Pages (from-to)839-846
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume75
Issue number752
DOIs
Publication statusPublished - 2009 Apr

Keywords

  • Current measurement
  • Fuel cell
  • Measurement
  • Nuclear magnetic resonance
  • Planar surface coil
  • Polymer electrolyte fuel cell

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Development of a measurement technique for current-density in PEFC using planar surface coil as a NMR signal detector (1st report, one-dimensional measurement of current-density generating in PEFC)'. Together they form a unique fingerprint.

  • Cite this