Johnson Matthey Public Limited Company

William Alexander Mortimore

Howard Colquhoun

Zhixue Zhu

Nadia Michele Walsby

Martin Philip Hogarth

An ion-conducting polymer wherein at least 80% of the repeat units comprise an ion-conducting region and a spacer region is disclosed. The ion-conducting region has an aromatic backbone of one or more aromatic groups, wherein at least one ion-conducting functional group is attached to each aromatic group. The spacer region has an aromatic backbone of at least four aromatic groups, wherein no ion-conducting functional groups are attached to the aromatic backbone. The polymer is suitable for use as a fuel cell membrane, and can be incorporated into membrane electrode assemblies.

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Cardiff, United Kingdom

William Alexander Mortimore