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Article
Design and fabrication of a micro fuel cell array with ‘flip-flop’ interconnection
Journal of Power Sources (2002)
  • Sang Joon John Lee, San Jose State University
  • A. Chang-Chien, Stanford University
  • S. W. Cha, Stanford University
  • R. O'Hayre, Stanford University
  • Y. I. Park, Stanford University
  • Y. Saito, Stanford University
  • F. B. Prinz, Stanford University
Abstract

A design configuration is presented for integrated series connection of polymer electrolyte fuel cells in a planar array. The design is particularly favorable for miniature fuel cells and has been prototyped using a variety of etch and deposition techniques adopted from microfabrication. The series path is oriented in a “flip-flop” configuration, presenting the unique advantage of a fully continuous electrolyte requiring absolutely no interconnecting bridges across or around the membrane. Electrical interconnections are made by thin-film metal layers that coat etched flow channels patterned on an insulating substrate. Both two-cell and four-cell prototypes have successfully demonstrated the expected additive performance of the integrated series, and peak power in a four-cell silicon assembly with hydrogen and oxygen has exceeded 40 mW/cm2. Factorial experimentation has been applied to investigate the adequacy of metal film conduction over etched topology, and results conclude that film thickness dominates over other design parameters. The design effort and subsequent testing has uncovered new topics for extended study, including the possibility of lateral ionic conduction within the membrane as well as the effects of non-uniform reactant distribution.

Keywords
  • design,
  • fabrication,
  • micro fuel cells
Publication Date
November, 2002
Publisher Statement
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Citation Information
Sang Joon John Lee, A. Chang-Chien, S. W. Cha, R. O'Hayre, et al.. "Design and fabrication of a micro fuel cell array with ‘flip-flop’ interconnection" Journal of Power Sources Vol. 112 Iss. 2 (2002)
Available at: http://works.bepress.com/sangjoonjohn_lee/23/