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http://dx.doi.org/10.5762/KAIS.2015.16.5.3627

Study on Graphite/Polypropylene/Liquid Crystalline Polymer Composite for a Bipolar Plate of Polymer Electrolyte Membrane Fuel Cell  

Dhungana, Biraj (Division of Advanced Materials Science & Engineering, Kongju National University)
Son, Younggon (Division of Advanced Materials Science & Engineering, Kongju National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.16, no.5, 2015 , pp. 3627-3632 More about this Journal
Abstract
We investigated mechanical, rheological and electrical properties of graphite/PP/LCP composites for a bipolar plate of the polymer electrolyte membrane fuel cell. The composites containing very low molecular weighted PP showed much higher electrical conductivity compared with other thermoplastics. This was attributed to the enhanced dispersion of graphite particles due to the low viscosity of the PP. The conductivity of the composites was increased in a great extent by incorporation of small amount of carbon nano tube (CNT). However, the acid treated CNT which contains oxygen atoms did not increase the conductivity of the composite. From this result, it is concluded that the CNT has higher affinity with non polar polymer. The composite with low molecular weighted PP provided good processability so that the composites can be processed by an injection molding while the mechanical strength is deficient compared to other polymers. In order to reinforce the low mechanical property, LCP/PP was used as a binder and the graphite/PP/LCP composite showed the higher conductivity and moderate mechanical strength maintaining suitable processability.
Keywords
bipolar plate; polymer/graphite composite; PP; LCP;
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Times Cited By KSCI : 2  (Citation Analysis)
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