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US 2006/0216584 A1Published application
Oxidation resistant electrolyte absorber
OwnerMichael Cheikyinventor
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Abstract
An oxidation-resistant electrolyte absorber, especially for use adjacent a divalent silver containing cathode in a secondary silver-zinc battery is prepared by saturating a porous web with a dilute solution of a vinyl alcohol polymer to form a film of the solution on the surfaces of the pores of web. The polyvinyl alcohol polymer is cross-linked to form an oxidation-resistant coating on the surfaces of the pores while retaining the liquid absorption capacity of the porous web.
Claims12
An oxidation-resistant electrolyte absorber comprising;
- a porous web of alkali-resistant material;
- and
- a film of oxidation-resistant, cross-linked vinyl alcohol polymer coating the surfaces of the pores of the web, said web substantially retaining its absorption capacity for liquid electrolyte and being resistant to strong oxidizing agents.
A method of preparing an oxidation-resistant electrolyte absorber comprising the steps of;
- saturating a porous web with a dilute solution of a vinyl alcohol polymer to form a film of the solution on the surface of the pores of the web;
- removing excess solution from the pores;
- cross-linking the vinyl alcohol polymer to form a coating of oxidation-resistant vinyl alcohol polymer on the surfaces of the pores.
Dependencies are inferred from the claim text.