Development of Measurement Technique for Mass Diffusion Coefficient of Methanol Aqueous Solutions in Polymer Electrolyte Membrane for Fuel Cell by Soret Forced Rayleigh Scattering

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  • Sakai Tadatsugu
    School of Integrated Design Engineering, Graduate School of Science and Technology, Keio University
  • Hotta Jumpei
    School of Integrated Design Engineering, Graduate School of Science and Technology, Keio University
  • Nagasaka Yuji
    Department of System Design Engineering, Faculty of Science and Technology, Keio University

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Other Title
  • ソーレー強制レイリー散乱法を用いた燃料電池用電解質膜内メタノール水溶液の拡散係数測定法の開発
  • ソーレー キョウセイ レイリー サンランホウ オ モチイタ ネンリョウ デンチヨウ デンカイシツマク ナイ メタノール スイヨウエキ ノ カクサン ケイスウ ソクテイホウ ノ カイハツ

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Abstract

Direct methanol fuel cell (DMFC) using polymer electrolyte membrane (PEM) is gaining recognition as a power source of portable electronics. However certain methanol through the PEM (i.e. methanol crossover) is known to cause the degradation of efficiency and output. Since, it is significant to develop a measurement method of mass diffusion coefficient in PEM. Therefore, we have newly developed the Soret Forced Rayleigh Scattering method (SFRS) using CO2 laser for measuring mass diffusion coefficient in PEM. SFRS is a noncontact and high-speed ( ~100ms) measurement technique. In the present study, we present difficulties and resolutions using heterodyne detection etc. in applying SFRS to solutions in PEM, and report preliminary result of diffusion coefficient of 13 wt% methanol aqueous solutions in Nafion 117 by newly constructed apparatus.

Journal

  • Netsu Bussei

    Netsu Bussei 26 (4), 196-202, 2014

    JAPAN SOCIETY OF THERMOPHYSICAL PROPERTIES

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