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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2005, Vol. 6 Issue (10): 12-    DOI: 10.1631/jzus.2005.A1080
    
Influence of graphite particle size and its shape on performance of carbon composite bipolar plate
ZHANG Jie, ZOU Yan-wen, HE Jun
Institute of Nuclear Energy and New Energy Technology, Tsinghua University, Beijing 100084, China
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Abstract  Bipolar plates for proton exchange membrane fuel cell (PEMFC) where polymer is used as binder and graphite is used as electric filler were prepared by means of compression molding technology. Study on the effects of graphite particle size and shape on the bipolar plate performance, such as electrical conductivity, strength, etc. showed that with decrease of graphite particle size, bulk electrical conductivity and thermometric conductivity decreased, but that flexural strength was enhanced. After spherical graphite occurrence in flake-like form, the flexural strength of the bipolar plate was enhanced, electrical conductivity increased but thermal conductivity decreased in direction paralleling pressure direction, and both electrical conductivity and thermometric conductivity reduced in direction perpendicular to pressure direction.

Key words： Spherical graphite      Fuel cell      Bipolar plate      Conductive composite materials     
Received: 09 May 2005     
CLC:  TN911.5  
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ZHANG Jie
ZOU Yan-wen
HE Jun
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ZHANG Jie, ZOU Yan-wen, HE Jun. Influence of graphite particle size and its shape on performance of carbon composite bipolar plate. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6(10): 12-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.A1080     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2005/V6/I10/12

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