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Effects of binder type and heat treatment temperature on physical properties of a carbon composite bipolar plate for PEMFCs

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2013, 14(2), pp.110-116
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

강동수 1 Roh, Jae-Seung 2

1금오공과대학교 신소재시스템공학부
2금오공과대학교

Accredited

ABSTRACT

This study investigated a developed process for producing a composite bipolar plate having excellent conductivity by using coal tar pitch and phenol resin as binders. We used a pressing method to prepare a compact of graphite powder mixed with binders. Resistivity of the impregnated compact was observed as heat treatment temperature was increased. It was observed that pore sizes of the GCTP samples increased as the heat treatment temperature increased. There was not a great difference between the flexural strengths of GCTP-IM and CPR-IM as the heat treatment temperature was increased. The resistivity of GPR700-IM, heat treated at 700°C using phenolic resin as a binder, was 4829 μΩ·cm which was best value in this study. In addition, it is expected that with the appropriate selection of carbon powder and further optimization of process we can produce a composite bipolar plate which has excellent properties.

Citation status

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