| 摘要 |
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, 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. A method of forming the battery separator.
|
