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Compression moldable composite bipolar plates with high through-plane conductivity

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A low cost method of fabricating bipolar plates for use in fuel cells utilizes a wet lay process for combining graphite particles, thermoplastic fibers, and reinforcing fibers to produce a plurality of formable sheets. The formable sheets are sandwiched between outer layers consisting of polymer and graphite particles, then molded into a bipolar plates with features impressed therein via the molding process. The bipolar plates formed by the process have sufficient mechanical strength and bulk conductivity to be used in fuel cells The outer layers provide for enhanced conductivity and resistance to gas permeation.
Huang, Jianhua (Blacksburg, VA), Baird, Donald G. (Blacksburg, VA), McGrath, James E. (Blacksburg, VA)
11/ 244,401
October 6, 2005
STATEMENT OF GOVERNMENT INTEREST [0002] This invention was made with government support under Contract Number DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.