Coating processes – Electrical product produced – Fuel cell part
Reexamination Certificate
2007-02-20
2007-02-20
Talbot, Brian K. (Department: 1762)
Coating processes
Electrical product produced
Fuel cell part
C427S383100, C427S383500, C029S623500, C204S192120, C204S192150
Reexamination Certificate
active
10449736
ABSTRACT:
A fluid impermeable thin film is fabricated on a porous substrate by depositing a material having a certain spatial oxidation expansion. After deposition, the material is oxidized whereby the deposited material expands and forms a void free film on top of the porous substrate. The snuggly contacting grain boundaries of the void free film may recombine to a continuous thin film that has a thickness of only a fraction of 1 μm and is substantially fluid impermeable. The small film height contributes to a high ionic conductivity that makes the thin film a preferred choice for a fuel cell electrolyte membrane enabling efficient fuel cell operation at temperatures well below 500° C.
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Cha Suk-Won
Lee Sang-Joon John
Park Yong-Il
Prinz Friedrich B.
Saito Yuji
Honda Giken Kogyo Kabushiki Kaisha
Lumen Intellectual Property Services
Talbot Brian K.
The Board of Trustees of the Leland Stanford Junior University
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