Ribbed electrode substrates

Details Ribbed electrode substrates Ribbed electrode substrates

1981-09-29

1983-02-22

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Having earth feature

429 36, H01M 486, H01M 496

Patent

active

043749062

ABSTRACT:
A ribbed substrate for an electrochemical cell electrode is made from a mixture of carbon fibers and carbonizable resin and has a mean pore size in the ribs which is 60-75% of the mean pore size of the web portions of the substrate which interconnect the ribs. Preferably the mean pore size of the web portion is 25-45 microns; and, if the substrate includes edge seals parallel to the ribs, the edge seals preferably have a mean pore size no greater than about ten microns. Most preferably the substrate has the same ratio of carbon fibers to polymeric carbon in all areas, including the ribs, webs, and edge seals. A substrate according to the present invention will have better overall performance than prior art substrates and minimizes the substrate thickness required for the substrate to perform all its functions well.

REFERENCES:
patent: 4129685 (1978-12-01), Damiano
patent: 4269642 (1981-05-01), De Casperis et al.

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