H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 2/16 (2006.01)
Patent
CA 2292290
A battery diaphragm having superior chemical resistance, low resistance, superior ion selective permeability and high mechanical strength is provided. The battery diaphragm is formed of a composite film including a complex of a porous base substrate (A) with a crosslinked polymer (B1) containing repeated units of a vinyl heterocyclic compound having at least two hydrophilic groups. Alternatively, the battery diaphragm is formed of a composite film including a complex of a porous base substrate (A) with a crosslinked polymer (B2) containing repeated units of a vinyl compound each having a functional group, and thereafter decomposing part of the functional groups. Alternatively, the battery diaphragm is formed of a composite film including a complex of a porous base substrate (A) with a crosslinked polymer (B3) containing repeated units of a vinyl compound each having a functional group, wherein the complex of the porous base substrate (A) with the crosslinked polymer is prepared by impregnating a porous structure of the porous base substrate (A) with a monomer mixture containing a crosslinking momomer and the vinyl compound having functional groups, and thereafter causing photopolymerization to generate the crosslinked polymer (B3) in the porous structure.
Miyake Shinichi
Tokuda Nobuyuki
Kansai Electric Power Co. Inc.
Marks & Clerk
Sumitomo Electric Industries Ltd.
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