Perpustakaan Digital ITB

Crystallized sulfonated poly(arylene etherketone) (Cr-SPAEK) materials constructed from densesulfonated hydrophilic segments and crystalline poly(etherketone) (PEK) hydrophobic backbone were designed. Themembrane exhibited considerable proton conductivity andsuperb solvent resistance owing to its special phasemorphology, the presence of a broad hydrophilic ion transportchannel, and a crystalline hydrophobic matrix. The densesulfonated hydrophilic segment provides excellent protonconductivity; the Cr-SPAEK-20 membrane exhibits higher proton-conducting ability than Nafion 117 in the temperature rangeof 20?100°C; its proton conductivity reaches about 168 mS cm?1at 100°C. The crystalline PEK hydrophobic segmentensures superior solvent resistance and dimensional stability, guaranteeing the durability of the membrane in practicalapplications. The methanol permeability of Cr-SPAEK-20 is only one-eighth that of Nafion 117 when the test conditions are thesame. The direct methanol fuel cell (DMFC), which is assembled by Cr-SPAEK-20, exhibited satisfactory open circuit voltageand maximum power density during the testing process. The Cr-SPAEK membranes have shown potential for DMFCs aspolymer electrolyte materials