%0 Journal Article %A Piyachai Khomein %A Wesley Ketelaars %A Tijs Lap %A Gao Liu %B Renewable and Sustainable Energy Reviews %D 2021 %G eng %P 110471 %R 10.1016/j.rser.2020.110471 %T Sulfonated aromatic polymer as a future proton exchange membrane: A review of sulfonation and crosslinking methods %V 137 %8 01/2021 %! Renewable and Sustainable Energy Reviews