Dry process for fabricating a unitary membrane-electrode structu

Details Dry process for fabricating a unitary membrane-electrode structu Dry process for fabricating a unitary membrane-electrode structu

1987-08-28

1989-04-18

Niebling, John F.

Plastic and nonmetallic article shaping or treating: processes

Forming electrical articles by shaping electroconductive...

204 98, 204128, 204252, 204282, 204296, 264343, C04B 3500, C25B 1300

Patent

active

048225444

ABSTRACT:
A process for fabricating a unitary membrane-electrode structure by attaching an electrode to a permselective membrane while the latter is in a non-hydrated (and essentially non-dissociated) form. The electrode, in the form of a bonded aggregate of catalytic and polymeric binder particles, is attached to a membrane having less than 0.01 grams of matrix water per gram of dry membrane by the application of heat and pressure. The membrane is then hydrated causing the membrane to swell by a controlled amount and converting it to the dissociated form. A membrane-electrode structure fabricated in this manner is particularly useful in the electrolysis of alkali metal halides because it is characterized by improved cathodic current efficiency and by reduced susceptibility to permeation of gaseous hydrogen.

REFERENCES:
patent: 4272353 (1981-06-01), Lawrance et al.
patent: 4381983 (1983-05-01), Korach
patent: 4423157 (1983-12-01), Masuda

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