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US 2025/0167289 A1Published application
Multilayer nanoporous separator
AssigneeLG Energy Solution, Ltd.
InventorsDavid W. Avison, Steven A. Carlson, Benjamin Sloan
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Abstract
A separator for a lithium battery having (a) a porous polymeric layer, such as a polyethylene layer; and (b) a nanoporous inorganic particle/polymer layer on both sides of the polymeric layer, the nanoporous layer having an inorganic oxide and one or more polymers; the volume fraction of the polymers in the nanoporous layer is about 15% to about 50%, and the crystallite size of the inorganic oxide is 5 nm to 90 nm.
Claims19
A separator for a lithium battery comprising:
- a porous polymeric layer having a first side and a second side;
- a first layer adjacent the first side of the porous polymeric layer, said first layer comprising a porous portion and a solid portion, wherein
- (a) the solid portion comprises inorganic oxide particles and at least one polymer, and a volume fraction of the one or more polymers in the solid portion is about 10% to about 50%
- (b) a plurality of the inorganic oxide particles in the first layer having a crystallite size of about 5 nm to about 90 nm;
- (c) the thickness of the first layer is about 3 microns or less;
- and
- (d) the ratio of the total thickness of the first layer to the total thickness of the separator is 10% to 80%.
4 more elements
Dependencies are inferred from the claim text.