Novel covalent-ionically cross-linked membranes with extremely low water swelling and methanol crossover for direct methanol fuel cell applications

作者：Wang Jing; Zhao Chengji; Zhang Gang; Zhang Yang; Ni Jing; Ma Wenjia; Na Hui^*

来源：Journal of Membrane Science, 2010, 363(1-2): 112-119.

DOI：10.1016/j.memsci.2010.07.022

• Carboxylic
• Cross-linking
• Proton exchange membrane
• Sulfonated poly(ether ether ketone)

In this paper, a sulfonated poly(arylene ether ketone) bearing carboxylic acid groups (C-SPEEK) was first synthesized. Then a new series of covalent-ionically cross-linked membranes using a poly(ether ether ketone) bearing amino groups (Am-PEEK) as a cross-linker were prepared for direct methanol fuel cell applications. Lower water swelling and lower methanol permeability membranes with higher mechanical strength were obtained via this covalent-ionically cross-linking method. The cross-linked network structure greatly improved the thermal and oxidative stability as compared to C-SPEEK membrane. The proton conductivity of C-SPEEK/Am-PEEKs was lower than that of non-cross-linked membrane, but its selectivity was higher. The properties of the cross-linked membranes in particular C-SPEEK/Am-PEEK-10 were investigated to confirm their potential applicability in fuel cells.

• 出版日期2010-11-1
• 单位吉林大学