Battery separators containing reactive functional groups

Details Battery separators containing reactive functional groups Battery separators containing reactive functional groups

2007-09-11

2007-09-11

Maples, John S. (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer, spacer or materials for use therewith

C429S250000, C429S144000

Reexamination Certificate

active

10857037

ABSTRACT:
A battery separator having a thermal shutdown mechanism and exhibiting excellent mechanical properties and low electrical resistance includes a water-scavenging and/or acid-scavenging material having reactive functional groups that chemically react with water or acid in the battery to remove the water or acid and thereby improve battery performance. The battery separator preferably includes a first polyolefin providing mechanical integrity and a second polyolefin including the water-scavenging or acid-scavenging reactive functional groups. The battery separator is preferably a microporous film including a polymer matrix throughout which the water-scavenging or acid-scavenging material is dispersed.

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