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Dhakate, S.R. (Physics and Engineering of Carbon, Materials Physics and Engineering Division, CSIR-National Physical Laboratory) Sharma, S. (Physics and Engineering of Carbon, Materials Physics and Engineering Division, CSIR-National Physical Laboratory) Mathur, R.B. (Physics and Engineering of Carbon, Materials Physics and Engineering Division, CSIR-National Physical Laboratory)
저널정보
한국탄소학회 Carbon letters Carbon letters 제14권 제1호
발행연도
2013.1
수록면
40 - 44 (5page)

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The bipolar plate is the most important and most costly component of proton exchange membrane fuel cells. The development of a suitable low density bipolar plate is scientifically and technically challenging due to the need to maintain high electrical conductivity and mechanical properties. Here, bipolar plates were developed from different particle sizes of natural and expanded graphite with phenolic resin as a polymeric matrix. It was observed that the particle size of the reinforcement significantly influences the mechanical and electrical properties of a composite bipolar plate. The composite bipolar plate based on expanded graphite gives the desired mechanical and electrical properties as per the US Department of Energy target, with a bulk density of 1.55 $g.cm^{-3}$ as compared to that of ~1.87 $g.cm^{-3}$ for a composite plate based on natural graphite (NG). Although the bulk density of the expanded-graphite-based composite plate is ~20% less than that of the NG-based plate, the I-V performance of the expanded graphite plate is superior to that of the NG plate as a consequence of the higher conductivity. The expanded graphite plate can thus be used as an electromagnetic interference shielding material.

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