Fuel cell

Details Fuel cell Fuel cell

2003-05-09

2008-03-11

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C429S010000, C427S115000

Reexamination Certificate

active

07341800

ABSTRACT:
A simple, inexpensive and highly efficient fuel cell has boundary structures made of a photo-sensitive material in combination with selective patterning. Printed circuit board (PCB) fabrication techniques combine boundary structures with two and three dimensional electrical flow path. Photo-sensitive material and PCB fabrication techniques are alternately or combined utilized for making micro-channel structures or micro stitch structures for substantially reducing dead zones of the diffusion layer while keeping fluid flow resistance to a minimum. The fuel cell assembly is free of mechanical clamping elements. Adhesives that may be conductively contaminated and/or fiber-reinforced provide mechanical and eventual electrical connections, and sealing within the assembly. Mechanically supporting backing layers are pre-fabricated with a natural bend defined in combination with the backing layers' elasticity to eliminate massive support plates and assist the adhesive bonding. Proton insulation between adjacent and electrically linked in-plane cell elements is provided by structural insulation within the central membrane.

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Wo 03/085760 Abstract.
S. J. Lee et al., “Design and fabrication of a micro fuel cell array with “flip-flop”interconnection,” Journal of Power Sources 112 (2002) 410-418.
Ryan O'Hayre et al., “Lateral Ionic Conduction in Planar Array Fuel Cells,” Journal of the Electrochemical Society, 150 (4) A430-A438 (2003).
Sang-Joon J. Lee et al., “Miniature fuel cells with non-planar interface by microfabrication,” The Electrochemical Society Proceeding Series, Pennington, NJ, 2000.

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