Chemically stable hybrid polymer electrolyte membranes prepared by silane-crosslinking and thiol-ene click chemistry

► A series of cross-linked hybrid membranes were prepared by a combination of silane-crosslinking and thiol-ene click chemistry. ► The cross-linked structure makes a great contribution to the improvement of dimensional and chemical stabilities. ► The cross-linked hybrid membranes showed lower swelling, lower methanol permeability and high selectivity for direct methanol fuel cells.