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US 11,769,903 B2Granted
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.
Claims20
A separator for use in a lithium battery comprising:
- (a) an extruded porous polymeric layer, which extruded porous polymeric layer comprises a plurality of pores, and
- (b) 0.27 grams, or greater, per square meter of boehmite particles disposed within the plurality of pores of the extruded porous polymeric layer.
A lithium battery comprising
- (a) an anode;
- (b) a cathode;
- (c) an organic electrolyte comprising a lithium salt;
- and
- (d) a separator interposed between said anode and said cathode, wherein said separator comprises:
- (i) an extruded porous polymeric layer, which extruded porous polymeric layer comprises a plurality of pores, and
- (ii) 0.27, or greater, grams per square meter of boehmite particles disposed within the plurality of pores of the extruded porous polymeric layer.
4 more elements
Dependencies are inferred from the claim text.