Advanced inorganic separators for alkaline batteries and method of making same
A method of forming a flexible, porous battery separator comprising a coating applied to a porous, flexible substrate is discussed. The coating comprises: (1) a thermoplastic rubber based resin which is insoluble and unreactive in the alkaline electrolyte (2) 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 (3) a mixture of polar particulate filler materials which are unreactive with the electrolyte. The mixture comprises at least one first filler material, 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 sq m/gr, and the amount of plasticizer is sufficient to coat each filler particle.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- OSTI ID:
- 5852881
- Report Number(s):
- NASA-CASE-LEW-13171-1
- Country of Publication:
- United States
- Language:
- English
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