Patent ID: 11898018
Assignee: AGC INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC C  H

Claim 13:
14. The polymer electrolyte membrane according to claim 5, wherein:
a ratio of a total number of moles of the cerium atoms to a total number of moles of the sulfonic acid groups contained in the acid-type sulfonic acid group-containing fluorocarbon polymer, is from 0.001 to 0.13;
an on exchange capacity of the acid-type sulfonic acid group-containing fluorocarbon polymer is from 0.5 to 2.5 meq/g dry resin;
a hydrogen gas permeation coefficient under conditions of a temperature of 80° C. and a relative humidity of 10% of the acid-type sulfonic acid group-containing fluorocarbon polymer comprising units represented by formula u1 is at least 1.0×10−12 cm3·cm/(s·cm2·cmHg) and at most 2.5×10−9 cm3·cm/(s·cm2·cmHg); and
the acid-type sulfonic acid group-containing fluorocarbon polymer further comprises tetrafluroethylene units.