US 11,658,333 B2
Microporous battery separators including polyolefin layer and non-woven layer with alkylbenzene sulfonic acid lithium salt surfactant, lithium batteries utilizing the same, and methods of manufacture of the same
Changqing Wang Adams, Fort Mill, SC (US); C. Glen Wensley, Rock Hill, SC (US); and Stefan Reinartz, Waxhaw, NC (US)
Assigned to Celgard, LLC, Charlotte, NC (US)
Filed by Celgard, LLC, Charlotte, NC (US)
Filed on Jul. 7, 2020, as Appl. No. 16/921,952.
Application 16/921,952 is a division of application No. 15/146,936, filed on May 5, 2016, granted, now 10,741,814.
Claims priority of provisional application 62/297,166, filed on Feb. 19, 2016.
Claims priority of provisional application 62/158,582, filed on May 8, 2015.
Prior Publication US 2020/0343510 A1, Oct. 29, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/0525 (2010.01); H01M 50/44 (2021.01); H01M 50/403 (2021.01); H01M 50/494 (2021.01); H01M 50/489 (2021.01); H01M 50/417 (2021.01); H01M 50/457 (2021.01); H01M 50/454 (2021.01); H01M 4/58 (2010.01)
CPC H01M 10/0525 (2013.01) [H01M 50/403 (2021.01); H01M 50/417 (2021.01); H01M 50/44 (2021.01); H01M 50/454 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01); H01M 50/494 (2021.01); H01M 4/5825 (2013.01)] 13 Claims
OG exemplary drawing
1. A microporous battery separator for a lithium battery, comprising:
a) a polyolefin layer which comprises at least one membrane of polypropylene; and
b) at least one non-woven layer on at least one side of the polyolefin layer, wherein the non-woven layer comprises polypropylene, and wherein the separator has a surfactant coating thereon and wherein the surfactant coating consists of a combination of lithium salts of a linear and branched alkylbenzene sulfonic acid depicted in the following chemical structures (1) and (2) in a combined weight add-on amount of from about 1.37% to about 10.0 wt. %:

OG Complex Work Unit Chemistry
where R is an alkyl functionality having the following formula CnH2n+1 with n >6 and Xm+is Li+or

OG Complex Work Unit Chemistry
where R1 and R2 are independently an alkyl functionality which can be CnH2n+1, with n>6 and Xm+is Li+.