High water-content membranes

摘要

The present invention is a hydrophilic polymer, which can be hydrated to form a hydrated hydrophilic polymer having a water content of at least 65%, wherein water content is defined as [(mass of the hydrated hydrophilic polymer- mass of the dry hydrophilic polymer)/mass of the hydrated hydrophilic polymer] x 100. The hydrophilic polymer may be hydrated to form a hydrated hydrophilic polymer having a water content of at least 65%. The present invention also 10 provides MEAs and electrochemical cells and methods of forming same.