US 11,056,750 B2
Microlayer membranes, improved battery separators, and methods of manufacture and use
Kang Karen Xiao, Mississauga (CA); Eric Joseph Penegar, Fort Mill, SC (US); Takahiko Kondo, Shiga (JP); Robert Nark, Fort Mill, SC (US); Eric Robert White, Fort Mill, SC (US); Xiaomin Zhang, Charlotte, NC (US); and Kristoffer K. Stokes, Lunenburg, MA (US)
Assigned to Celgard, LLC, Charlotte, NC (US)
Appl. No. 15/773,201
Filed by Celgard, LLC, Charlotte, NC (US)
PCT Filed Nov. 11, 2016, PCT No. PCT/US2016/061510
§ 371(c)(1), (2) Date May 3, 2018,
PCT Pub. No. WO2017/083633, PCT Pub. Date May 18, 2017.
Claims priority of provisional application 62/253,932, filed on Nov. 11, 2015.
Prior Publication US 2018/0323417 A1, Nov. 8, 2018
Int. Cl. H01M 2/16 (2006.01); H01M 10/0525 (2010.01); H01M 50/449 (2021.01); B01D 71/26 (2006.01); B01D 69/12 (2006.01); H01M 50/411 (2021.01)
CPC H01M 50/449 (2021.01) [B01D 69/12 (2013.01); B01D 71/26 (2013.01); H01M 10/0525 (2013.01); H01M 50/411 (2021.01)] 13 Claims
OG exemplary drawing
 
1. A battery separator for a lithium battery comprising:
at least one dry-process microporous polymer membrane comprising a plurality of co-extruded porous polymer microlayers with a thickness of less than 2 microns; and
at least two other dry-process microporous polymer membranes, wherein
the at least one dry-process microporous polymer membrane comprising a plurality of co-extruded porous polymer microlayers with a thickness of less than 2 microns and the at least two other dry process microporous polymer membranes are laminated to one another.