Acid-base blend membranes based on Nafion (R)/aminated SPEEK for reducing methanol permeability

作者：Tsai Jie Cheng; Lin Chien Kung^*

来源：Journal of the Taiwan Institute of Chemical Engineers, 2011, 42(2): 281-285.

DOI：10.1016/j.jtice.2010.07.003

• Proton exchange membrane
• Acid-base
• Blend
• Sulfonated poly(ether ether ketone)
• Direct methanol fuel cell

Sulfonated poly(ether ether ketone)s (SPEEKs) were further substituted on the polymer main chain by amino groups to form an acid-basic polymer, and blended with acid polymeric Nafion (R) to create composite membranes. The acid-base blend membranes containing ionic crosslinking exhibited lower water uptake than recast Nafion (R), and the methanol permeability was reduced significantly for various contents of aminated SPEEK, with a maximum proton conductivity of similar to 0.063 S cm(-1) at 30 C. The single-cell performance of the blend membranes with various contents of aminated SPEEK showed 20-26 mW cm(-2) for S45A47 at 80 degrees C. Both the power density and open circuit voltage were higher than those of Nation (R) 115 and recast Nafion (R) The acid-base blend membranes satisfy the requirements for proton exchange membranes in the context of direct methanol fuel cell (DMFC) applications.

• 出版日期2011-3