US 11,990,639 B2
Polylactam coated separator membranes for lithium ion secondary batteries and related coating formulations
Insik Jeon, Ithaca, NY (US)
Assigned to Celgard, LLC, Charlotte, NC (US)
Filed by Celgard, LLC, Charlotte, NC (US)
Filed on Oct. 12, 2021, as Appl. No. 17/498,776.
Application 17/498,776 is a division of application No. 17/103,741, filed on Nov. 24, 2020, granted, now 11,721,872.
Application 17/103,741 is a division of application No. 15/962,018, filed on Apr. 25, 2018, granted, now 10,879,514, issued on Oct. 29, 2020.
Application 15/962,018 is a division of application No. 14/982,466, filed on Dec. 29, 2015, granted, now 9,985,263, issued on May 29, 2018.
Claims priority of provisional application 62/099,636, filed on Jan. 5, 2015.
Claims priority of provisional application 62/097,199, filed on Dec. 29, 2014.
Prior Publication US 2022/0029245 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/417 (2021.01); H01M 10/0525 (2010.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01); H01M 50/489 (2021.01)
CPC H01M 50/417 (2021.01) [H01M 50/449 (2021.01); H01M 50/489 (2021.01); H01M 10/0525 (2013.01); H01M 50/446 (2021.01)] 14 Claims
OG exemplary drawing
 
1. A coated battery separator comprising:
a battery separator comprising a tri-layered base membrane; and
a coating on one or two sides of the battery separator, wherein the coating comprises polyvinyl alcohol (PVA), ceramic particles and vinyl pyrrolidone co-vinyl acetate copolymer (Poly(VP-co-Vac)) having a ratio of Poly(VP-co-Vac) to PVA of 1:0.1.