The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 1982
Filed:
Sep. 09, 1980
Karl Hohne, Erlangen, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
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.