Structures for gas diffusion materials and methods for their...

Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Electrode structure or composition

Reexamination Certificate

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C429S532000

Reexamination Certificate

active

07923172

ABSTRACT:
An improved structure for gas diffusion electrodes and gas diffusion layers whereby fine gradients of porosity and hydrophobicity promote efficient gas transport, water removal and overall enhanced performance of Membrane Electrode Assemblies constructed with these components.

REFERENCES:
patent: 4293396 (1981-10-01), Allen et al.
patent: 6017650 (2000-01-01), Ramunni
patent: 6106965 (2000-08-01), Hirano et al.
patent: 6350539 (2002-02-01), Wood et al.
patent: 2003/0124414 (2003-07-01), Hertel et al.
patent: 198 40 517 (2000-03-01), None

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