Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Characterization of Titanium Diboride Composite Bipolar Plate for Polymer Electrolyte Membrane Fuel Cell

전해질 연료전지용 복합분리판의 특성에 미치는 TiB2 첨가효과

  • Park, Jong-Moon (Dept. of Materials Science and Engineering, Kumoh National Institute of Technology (KIT)) ;
  • Sohn, Je-Ha (Advanced Technology Team, Pohang Institute of Metal Industry Advancement (POMIA)) ;
  • Park, Yong-Il (Dept. of Materials Science and Engineering, Kumoh National Institute of Technology (KIT)) ;
  • Lee, Dong-Gu (Dept. of Materials Science and Engineering, Kumoh National Institute of Technology (KIT)) ;
  • Oh, Myung-Hoon (Dept. of Materials Science and Engineering, Kumoh National Institute of Technology (KIT))
  • 박종문 (금오공과대학교 신소재시스템공학부) ;
  • 손지하 (포항금속소재산업진흥원) ;
  • 박용일 (금오공과대학교 신소재시스템공학부) ;
  • 이동구 (금오공과대학교 신소재시스템공학부) ;
  • 오명훈 (금오공과대학교 신소재시스템공학부)
  • Received : 2014.03.14
  • Accepted : 2014.04.03
  • Published : 2014.07.30
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Abstract

The effect of varying amounts of graphite and $TiB_2$ on the electrical conductivity of composite bipolar plates was systematically studied. In this study, Titanium diboride ($TiB_2$) which has a high electrical conductivity, was selected as a filler and a additive material instead of conventional graphite. For proper distribution of the filler and matrix materials, ball milling using alumina balls was conducted for 1h, and then the hot press method was applied for the preparation of composite samples. The results showed a rapid increase in the electrical conductivity of composite bipolar plates at the critical filler content. However, $TiB_2$ and graphite composite bipolar plates showed similar increases in the electrical conductivity even though $TiB_2$ has a higher electrical conductivity than graphite. In addition, it was also found that a small addition of $TiB_2$ to graphite filler could be very effective for increasing the electrical conductivity and flexural strength of the composite bipolar plate.

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References

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