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Fuel Cell Stacks Based on Micro Fuel Cell Units for a Substantially Increased Power Density

[+] Author Affiliations
Yiding Cao

Florida International University, Miami, FL

Paper No. MNC2007-21471, pp. 921-926; 6 pages
doi:10.1115/MNC2007-21471
From:
  • 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems
  • First International Conference on Integration and Commercialization of Micro and Nanosystems, Parts A and B
  • Sanya, Hainan, China, January 10–13, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4265-7 | eISBN: 0-7918-3794-7
  • Copyright © 2007 by ASME

abstract

This paper introduces a bio-inspired fuel cell stack that has a substantially increased specific reactive surface area. The fuel cell stack is based on micro fuel-cell units that generally has a circular shape and an effective diameter on the order of 1 mm. A number of fuel cell units are arranged to form a fuel cell module, and then these modules are stacked one over another and electrically connected to form a fuel cell stack. An evaluation on the stack indicates that the specific reactive surface area may be increased by more than 10 fold compared to a conventional bipolar plate based fuel cell stack. A fuel cell stack that has such a substantially increased specific reactive surface area may enable a substantially increased power density, a substantially reduced fuel cell stack size, and an improved energy utilization efficiency. Additionally, the present fuel cell stack eliminates the fuel sealing problem in a planar fuel cell stack and allows a much higher operating pressure difference between the fuel and air streams.

Copyright © 2007 by ASME

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