Process for the preparation of gas diffusion electrodes

Details Process for the preparation of gas diffusion electrodes Process for the preparation of gas diffusion electrodes

1994-07-01

1995-08-15

Gorgos, Kathryn

Chemistry: electrical current producing apparatus, product, and

Having earth feature

427115, 264105, 264127, 296235, 204290R, H01M 486, B05D 512, C04B 3500, C25B 1100

Patent

active

054418232

ABSTRACT:
The invention provides a process for preparing a gas-diffusion electrode for metal-air batteries and fuel cells of the type having a blocking layer formed from a precursor containing carbon black and particulate hydrophobic polymeric binders, comprising heating the carbon black at a temperature of about 400.degree.-1,200.degree. C. for a period of about 1-10 hours in a reducing environment, prior to the formation of the precursor, whereby hydrophilic centers in the pre-treated carbon black are minimized without increasing its corrosivity/surface area and thereby increasing the stability in concentrated KOH at high-cell operating temperatures of a blocking layer formed from the pre-treated carbon black.

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