Alkaline battery with separator of high surface area
AssigneeW. R. Grace & Co.
InventorsJoseph T. Lundquist, Jr., Christian B. Lundsager
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Abstract
The instant invention is directed to battery separator membranes useful in alkaline battery systems formed from a homogeneous admixture of a polyolefin, a plasticizer, and a filler selected from particulate material having a surface area of from 100 to 385 m.sup.2 /cc and a pore volume of at least 0.075 cc/gm.
Claims13
In an alkaline battery system having positive electrodes, negative electrodes, an alkaline electrolyte and separator membrane positioned between positive and negative electrode pairs, wherein the improvement comprising separator membranes, each having a thickness of less than about 10 mils and formed from an admixture of from 7 to 30 weight percent polyolefin having an average molecular weight of at least 100,000;
- from 0 to 15 weight percent plasticizer;
- and from 50 to 93 weight percent of a filler selected from titania, alumina, magnesium hydroxide or calcium hydroxide, said filler having a surface area of from 100 to 385 m.sup.2 /cc and a pore volume of at least 0.075 cc/gm.
Dependencies are inferred from the claim text.