Diaphragms for electrochemical cells and the manufacture thereof

Details Diaphragms for electrochemical cells and the manufacture thereof Diaphragms for electrochemical cells and the manufacture thereof

1980-09-09

1982-04-27

Chin, Peter

Paper making and fiber liberation

Processes and products

Including solid non-waterlaid preform

162106, 162108, 162138, 162152, 162169, 204295, 204296, 428444, C25B 1300

Patent

active

043269141

ABSTRACT:
The invention relates to a method for the manufacture of diaphragms of fibrous potassium titanate and an organic binder for electrochemical cells and has as the object to develop such a method in such a direction that it allows the manufacture of diaphragms which are relatively thin but have, at the same time, a sufficient long-term chemical and mechanical stability at high operating temperatures. According to the invention, provision is made for this purpose to apply potassium titanate, together with polytetrafluoroethylene and a styrene-butadiene copolymer, from a suspension, to a screen with a mesh width between about 0.1 and 0.4 mm. The diaphragms made by the method according to the invention are suitable particularly as cover layers in fuel cells with an alkaline electrolyte.

REFERENCES:
patent: 3583891 (1971-06-01), Hacker et al.
patent: 4126535 (1978-11-01), Balko et al.
patent: 4126536 (1978-11-01), Balko et al.

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