"Bipolar plates are one of the most expensive components of a PEM fuel cell and by far the heaviest. Bipolar plates are responsible for providing flow fields for reaction gases, acting as current collectors for electrons liberated during the chemical reaction inside the cell, and providing structural support for the fuel cell stack. Current PEM fuel cell bipolar plate technology is built on the use of sintered graphite which is costly and requires time-consuming machining. Furthermore, due to the brittle nature of graphite, plates must be made relatively thick which adds significant weight and volume to larger stacks, such as those required for automobiles. Hybrid composite bipolar plates were developed with the goal of providing an alternative material which offers sufficient conductivity, corrosion resistance, and mechanical strength. A conductive resin system using epoxy, polyaniline, carbon black, and milled carbon fibers was developed to serve as a matrix for continuous carbon fiber reinforcement which enhanced both strength and conductivity above what is possible to achieve through the use of chopped fibers. The developed conductive resin system showed a high glass transition temperature (above 180⁰C) and tensile strength greater than or equal to 41 MPa. The developed hybrid composite material showed conductivity greater than 100 S/cm and excellent tensile and flexural strength, far exceeding industry targets"--Abstract, page iii.
Liou, Frank W.
Schuman, Thomas P.
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
Air Force Research Laboratory (Wright-Patterson Air Force Base, Ohio)
Missouri Space Grant Consortium
Missouri University of Science and Technology
viii, 47 pages
© 2011 Nathaniel James Richie, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Proton exchange membrane fuel cells -- Design
Print OCLC #
Electronic OCLC #
Link to Catalog Recordhttp://laurel.lso.missouri.edu/record=b10138917~S5
Richie, Nathaniel James, "Development of hybrid composite bipolar plates for proton exchange membrane fuel cells" (2011). Masters Theses. 7137.