Battery separator
AssigneeCorning Incorporated
InventorsJohn L. Stempin, Ronald L. Stewart, Dale R. Wexell
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Abstract
A battery assembly comprising a separator, spaced metal/metal oxide electrodes and a liquid electrolyte, the improvement comprising a rigid, porous, ceramic separator that is wettable by the liquid electrolyte, that has a porosity of 40-90 volume %, an average pore size in the range of 0.1-25 microns, a thickness of 1-12 mm, and a weight loss of not more than about 5% when exposed to H.sub.2 SO.sub.4 having a specific gravity of 1.28 for 72 hours at 70.degree.C.
Claims15
A rechargeable battery assembly comprising a liquid electrolyte, spaced metal/metal oxide electrodes and a separator between the electrodes, the improvement comprising a rigid, porous, ceramic separator that is wettable by the liquid electrolyte, that has a porosity of 40-90 volume %, an average pore size in the range of 0.1-25 microns, a thickness of 1-12 mm, and a weight loss of not more than about 5% when refluxed in H.sub.2 SO.sub.4 of 1.28 specific gravity for 72 hours at 70.degree. C.
A porous, ceramic battery separator that is wettable by a liquid electrolyte, that has a porosity of 40-90 volume %, an average pore size in the range of 0.1-25 microns, a thickness of 1-12 mm, and a weight loss of not more than 5% when exposed to H.sub.2 SO.sub.4 of 1.28 specific gravity for 72 hours at 70.degree. C.
Dependencies are inferred from the claim text.