US 12,469,931 B2
Battery separator including microporous polyolefin membrane with ceramic coating
Zhengming Zhang, Rock Hill, SC (US); Xuefa Li, Matthews, NC (US); Lie Shi, Matthews, NC (US); Premanand Ramadass, Charlotte, NC (US); Paul M. Halmo, Denver, NC (US); and Xiaomin Zhang, Charlotte, NC (US)
Assigned to Celgard, LLC, Charlotte, NC (US)
Filed by Celgard, LLC, Charlotte, NC (US)
Filed on Dec. 16, 2022, as Appl. No. 18/083,034.
Application 18/083,034 is a division of application No. 16/785,726, filed on Feb. 10, 2020, granted, now 11,532,854.
Application 16/785,726 is a division of application No. 13/960,924, filed on Aug. 7, 2013, granted, now 10,559,802, issued on Feb. 11, 2020.
Claims priority of provisional application 61/680,550, filed on Aug. 7, 2012.
Prior Publication US 2023/0318141 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 50/449 (2021.01); H01M 10/052 (2010.01); H01M 50/403 (2021.01); H01M 50/406 (2021.01); H01M 50/411 (2021.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/423 (2021.01); H01M 50/431 (2021.01); H01M 50/434 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01)
CPC H01M 50/449 (2021.01) [H01M 50/403 (2021.01); H01M 50/406 (2021.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/423 (2021.01); H01M 50/434 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 10/052 (2013.01); H01M 50/411 (2021.01); H01M 50/431 (2021.01)] 23 Claims
OG exemplary drawing
 
1. A ceramic-coated battery separator, comprising:
a microporous polyolefin membrane; and
a ceramic coating on at least one surface of said microporous polyolefin membrane, the ceramic coating comprising ceramic particles in a polymeric binder comprising poly (sodium acrylate-acrylamide-acrylonitrile) copolymer, wherein the ceramic-coated separator exhibits a strain shrinkage of 0% at temperatures greater than or equal to 120 degrees Celsius.