H - Electricity – 01 – M
Patent
H - Electricity
01
M
319/60
H01M 2/16 (2006.01) H01M 10/24 (2006.01)
Patent
CA 1167099
ABSTRACT A flexible, porous battery separator comprising a coating applied to a porous, flexible substrate. The coating comprises: a) a thermoplastic rubber-based resin which is insoluble and unreactive in the alkaline electrolyte, b) a polar organic plasticizer which is reactive with the alkaline electrolyte to produce a reaction product which contains a hydroxyl group and/or a carboxylic acid group, and c) a mixture of polar particulate filler materials which are unreactive with the electrolyte, the mixture comprising at least one first filler material having a surface area of greater than 25 meters2/gram, and at least one second filler material having a surface area of 10 to 25 meters2/gram, wherein the volume of the mixture of filler materials is less than 45% of the total volume of the fillers and the binder, the filler surface area per gram of binder is about 20 to 60 meters2/gram, and the amount of plasticizer is sufficient to coat each filler particle.
387478
G. Ronald Bell & Associates
National Aeronautics And Space Administration
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