Phosphorylated poly(ethylene-co-vinyl alcohol) doping for enhanced proton conductivity and mechanical properties of side chain–type sulfonated poly(aryl ether ketone) proton-exchange membranes

Recent advances in non-perfluorinated sulfonic acid proton exchange membranes in the energy field

“…The membrane exhibited a tensile strength of 31.2 MPa and a high modulus of 4.3 GPa, offering a theoretical and experimental method for the crosslinking effect and the synergistic effect of nanocluster bicontinuous structure to promote the improvement of membrane performance. Dong et al 111 incorporated phosphorylated polyethylene- co -vinyl alcohol (PEVOH) into SPAEK membranes, improving the mechanical properties with an increase in PEVOH content. SPAEK-8% PEVOH demonstrated the best mechanical properties, with a Young's modulus of 1.92 GPa, a maximum tensile stress of 80.2 MPa, and an elongation of 111.7%, thanks to the high crystallinity of the CO group in the polymer backbone and the enhancement and toughening effect of PEVOH (Fig.…”