US 12,191,522 B2
Porous polybenzimidazole as separator for lithium ion batteries
Vikas Kumar, Pune (IN); Swaminathan Sivaram, Pune (IN); and Ver Avadhani Chilukuri, Pune (IN)
Assigned to COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH, New Delhi (IN)
Appl. No. 16/490,851
Filed by COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH, New Delhi (IN)
PCT Filed Mar. 5, 2018, PCT No. PCT/IN2018/050118
§ 371(c)(1), (2) Date Sep. 3, 2019,
PCT Pub. No. WO2018/163203, PCT Pub. Date Sep. 13, 2018.
Claims priority of application No. 201711007734 (IN), filed on Mar. 6, 2017.
Prior Publication US 2019/0386276 A1, Dec. 19, 2019
Int. Cl. H01M 50/446 (2021.01); C08G 73/18 (2006.01); C08K 3/26 (2006.01); C08K 3/36 (2006.01); C08L 33/24 (2006.01); H01M 10/0525 (2010.01); H01M 50/40 (2021.01); H01M 50/414 (2021.01); H01M 50/489 (2021.01); H01M 50/497 (2021.01)
CPC H01M 50/446 (2021.01) [C08G 73/18 (2013.01); C08K 3/26 (2013.01); C08K 3/36 (2013.01); H01M 10/0525 (2013.01); C08K 2003/265 (2013.01); C08L 33/24 (2013.01); C08L 2203/16 (2013.01); C08L 2203/20 (2013.01); H01M 50/40 (2021.01); H01M 50/414 (2021.01); H01M 50/489 (2021.01); H01M 50/497 (2021.01)] 11 Claims
OG exemplary drawing
 
1. A porous film comprising amorphous polybenzimidazole and at least one filler for use as a separator in a lithium ion battery, wherein the amount of filler is in the range of 0.5 wt % to 5.0 wt % of the amorphous polybenzimidazole, wherein said filler consists of silica, calcium carbonate, or a combination thereof, wherein the porous film has a melt integrity up to a temperature of 375° C., and wherein the porous film is standalone and is free of a coating and a support.