Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Characterization of Milled Carbon Fibers-filled Pitch-based Carbon Paper for Gas Diffusion Layer

미분쇄 탄소섬유가 첨가된 피치계 탄소섬유기반 기체확산층용 탄소종이 특성

  • Ham, Eun-Kwang (Korea Institute of Carbon Convergence Technology) ;
  • Yoon, Dong-Ho (R&D Center, KUK IL Paper MFG. Co., Ltd.) ;
  • Kim, Byoung-Suhk (Department of Organic Materials and Fiber Engineering, Chonbuk National University) ;
  • Seo, Min-Kang (Korea Institute of Carbon Convergence Technology)
  • Received : 2016.08.16
  • Accepted : 2016.10.31
  • Published : 2016.10.31
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Abstract

In this work, the pitch-based carbon paper (P-CP) was prepared by re-impregnating of binder pitches and PAN-based milled carbon fibers (MCF) at low temperature carbonization process. The influence of MCF content on physicochemical properties of MCF/P-CP was investigated. As a result, the tensile strength of MCF/P-CP was increased sharply from 10 wt.% to 20 wt.% of MCF. Also, the increase of MCF content led to the decrease of interfacial contact resistivity and the improvement of electrical and thermal conductivity of MCF/P-CP. These results were probably due to the increase of density of MCF/P-CP, resulting in the formation of electrically and thermally conductive paths of the carbon paper.

본 연구에서는 피치계 탄소섬유기반 탄소종이에 바인더 피치와 PAN계 미분쇄 탄소섬유를 첨가하여 저온탄화를 통해 재함침된 탄소종이를 제작하였으며, 미분쇄 탄소섬유의 첨가가 탄소종이의 기계적 및 전기적 특성과 열전도도에 미치는 영향을 알아보았다. 실험 결과, 인장강도는 미분쇄 탄소섬유 함량 10 wt.%부터 20 wt.%까지 첨가하였을 때 크게 증가하였다. 또한, 미분쇄 탄소섬유 함량이 증가함에 따라 계면접촉저항은 감소하였으며, 전기전도도 및 열전도도는 증가하였다. 이러한 결과는 미분쇄된 탄소섬유의 첨가가 탄소종이의 밀도를 증가시킴에 따라 전기적 및 열적 전달 경로가 형성되었기 때문이라고 판단된다.

Keywords

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