In order to meet the requirements of middle-high temperature proton exchange membrane full cells

different weight ratio (Am-PAEK/SPAEKS) composite membranes are prepared by solution casting of the high degree sulfonated poly(aryle ether ketone sulfone)(SPAEKS) and poly(aryle ether ketone) with amino groups (Am-PAEK) as raw material.Cross-linked composite membranes are obtained by a heating reaction at 160℃.The cross-linked structure is formed in the membrane by acid-base cross-linking reaction between amino and sulfonic acid groups.The composite membranes show good thermal stability

dimensional stability and methanol permeability.The Am-PAEK/SPAEKS-C-3 membrane exhibits excellent proton conductivity up to 0.0892 S/cm at 120℃

which is superior to that of Nafion membrane (0.062 S/cm) and SPAEKS membrane (0.0654 S/cm) under the same test conditions.The water diffusion coefficient of the Am-PAEK/SPAEKS-C-3 membrane reaches 3.5110-9 cm2/s that is lower than that of SPAEKS membrane (8.9610-8 cm2/s).The methanol diffusion coefficient (0.1410-6 cm2/s) of Am-PAEK/SPAEKS-C-3 membrane is lower than that of pure SPAEKS membranes (0.8510-6 cm2/s) and the Nafionmembrane (210-6cm2/s).Experimental data confirm that Am-PAEK/SPAEKS-C-3 membrane has high proton conductivity and low methanol diffusion coefficient in middle-high temperatures.All the results indicate that Am-PAEK/SPAEKS-C-3 crosslinked composite membrane may be a potential material for middle-high temperature proton exchange membrane fuel cells applications.