Method for fabricating a ribbed electrode substrate

Details Method for fabricating a ribbed electrode substrate Method for fabricating a ribbed electrode substrate

1977-08-15

1979-08-21

Derrington, James H.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

264129, 423445, 4234472, 423449, B29C 2500, C01B 3102

Patent

active

041653491

ABSTRACT:
An economical method for fabricating a porous electrochemical cell substrate having ribs on one side comprises molding the substrate by loading a die of the proper configuration with a predetermined amount of a dry mixture of thermosetting resin and carbon fibers. The mixture is partially cured using heat and low pressure and then is fully cured up to at least 1100.degree. C. to convert all the resin to glassy carbon. The amount of mixture loaded into the die is preselected to yield a finished part having a porosity of at least 75%. Preferably the ribbed substrate is wetproofed in all areas except the ribs which are used to store excess electrolyte during cell operation.

REFERENCES:
patent: 3219731 (1965-11-01), Etzel et al.
patent: 3297490 (1967-01-01), Barber et al.
patent: 3346678 (1967-10-01), Ohlgren
patent: 3552533 (1971-01-01), Graham
patent: 3909298 (1975-09-01), Carr

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