A covalent crosslinking of ion-conducting materials via sulfonic acid groups can be applied to various low cost electrolyte membrane base materials for improved fuel cell performance metrics relative to such base material. This proposed approach is due, in part, to the observation that many aromatic...http://www.google.de/patents/US6962959?utm_source=gb-gplus-sharePatent US6962959 - Composite electrolyte with crosslinking agents
