US 12,412,923 B2
Multilayer nanoporous separator
David W. Avison, Boxborough, MA (US); Steven A. Carlson, Cambridge, MA (US); and Benjamin Sloan, Exeter, NH (US)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Filed by LG Energy Solution, Ltd., Seoul (KR)
Filed on Jan. 15, 2025, as Appl. No. 19/022,365.
Application 19/022,365 is a continuation of application No. 18/631,783, filed on Apr. 10, 2024.
Application 18/631,783 is a continuation of application No. 17/543,259, filed on Dec. 6, 2021, granted, now 11,973,181, issued on Apr. 30, 2024.
Application 17/543,259 is a continuation of application No. 17/223,845, filed on Apr. 6, 2021, granted, now 11,769,903, issued on Sep. 26, 2023.
Application 17/223,845 is a continuation of application No. 16/755,294, granted, now 10,998,536, issued on May 4, 2021, previously published as PCT/US2018/055862, filed on Oct. 15, 2018.
Claims priority of provisional application 62/572,083, filed on Oct. 13, 2017.
Prior Publication US 2025/0158106 A1, May 15, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/0525 (2010.01); H01M 50/417 (2021.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)
CPC H01M 10/0525 (2013.01) [H01M 50/417 (2021.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)] 29 Claims
OG exemplary drawing
 
1. A lithium battery comprising:
an anode;
a cathode; and
a separator 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 pores and solid material, wherein
(a) the solid material comprises inorganic oxide particles and at least one polymer, and a volume of the at least one polymer in the solid material comprises 10% to 50% of the solid material;
(b) a plurality of the inorganic oxide particles in the first layer comprise crystallites having a size in the range of 5 nm to 90 nm;
(c) a thickness of the first layer is 3 microns or less and a total coating weight of the first layer is less than 6.0 gsm; and
(d) the ratio of the thickness of the first layer to a total thickness of the separator is 10% to 80%.