US 11,728,500 B2
Polymer electrolyte membrane, membrane electrode assembly, polymer electrolyte fuel cell, and process for producing polymer electrolyte membrane
Yuichi Inoue, Tokyo (JP); Hitoshi Shobukawa, Tokyo (JP); Naoki Sakamoto, Tokyo (JP); and Akihiro Kurima, Tokyo (JP)
Assigned to ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/613,749
Filed by ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed May 28, 2020, PCT No. PCT/JP2020/021178
§ 371(c)(1), (2) Date Nov. 23, 2021,
PCT Pub. No. WO2020/241773, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 2019-102607 (JP), filed on May 31, 2019.
Prior Publication US 2022/0238902 A1, Jul. 28, 2022
Int. Cl. H01M 8/1067 (2016.01); H01M 8/1004 (2016.01); H01M 8/1039 (2016.01); H01M 8/1048 (2016.01); H01M 8/1046 (2016.01); H01M 8/1081 (2016.01); H01M 8/10 (2016.01)
CPC H01M 8/1067 (2013.01) [H01M 8/1004 (2013.01); H01M 8/1039 (2013.01); H01M 8/1046 (2013.01); H01M 8/1048 (2013.01); H01M 8/1081 (2013.01); H01M 2008/1095 (2013.01); H01M 2300/0082 (2013.01)] 12 Claims
 
1. A polymer electrolyte membrane comprising:
(a) a polyelectrolyte having an ion exchange capacity of from 0.5 to 3.0 meq/g; and
(b) at least one scandium compound selected from the group consisting of scandium oxide, scandium acetate, scandium sulfate, scandium nitrate, and scandium carbonate, wherein
a polyethylene glycol (PEG)-derived compound in the polymer electrolyte membrane has a total content of greater than 0 and 10 ppm or less.