New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
권호 표지

Study of Au-PTFE/Al Metallic bipolar plate for PEMFC

고분자 전해질형 연료전지용 Au-PTFE/Al 금속분리판 연구

  • 유승을 (자동차부품연구원 환경소재연구센터) ;
  • 김명환 (자동차부품연구원 환경소재연구센터) ;
  • 구영모 (자동차부품연구원 환경소재연구센터)
  • Published : 2007.03.26
Download PDF
⟨ Previous Next ⟩

Abstract

Aluminum was used as metallic bipolar plate material to reduce a stack weight. The functional materials such as conductive material, Au and nonconductive material, PTFE [polytetrafluoroethylene] were coated on the bipolar plate to enhance electrical contact and corrosion prevention in PEMFC. The active area of bipolar plate is divided into the top layer part that electric current mainly passes, and the bottom layer part that gas and water pass. The bottom layer part in the flow channel needs not to have electrical conductivity because it doesn't pass electric current directly. In this reason, Au on the top layer and PTFE on the bottom layer were coated to apply high electrical conductivity and/or good corrosion resistance. Although the single cell performance using Au-PTFE/Al bipolar plate was shown 78% in comparison with that of graphite, specific power of Au-PTFE/Al bipolar plate(0.4 W/g) was twice as much as graphite bipolar plate.

Keywords