Durability of sulfonated polyimide membrane in humidity cycling for fuel cell applications

作者：Miyatake Kenji^*; Furuya Hiroshi; Tanaka Manabu; Watanabe Masahiro

来源：Journal of Power Sources, 2012, 204: 74-78.

DOI：10.1016/j.jpowsour.2011.12.039

• Sulfonated polyimide
• Humidity cycling
• Gas permeability
• Membrane degradation
• Mechanical failure

An aromatic proton conductive polymer, sulfonated polyimide copolymer membrane, was tested in humidity cycling under the conditions simulating fuel cell operation. The membrane was exposed periodically (every 2 min) to dry (nominal 0% relative humidity) and wet (100% relative humidity) at 80 C, similar to the United States Department of Energy (US DOE) protocol for proton exchange membrane fuel cells. The membrane was durable for 10,000 cycles without mechanical failure. Post-test analyses by H-1 NMR spectra and gel permeation chromatography (GPC) revealed that the membrane was hydrolyzed to some extent during the cycling test while mechanical properties and gas impermeability were only slightly deteriorated.

• 出版日期2012-4-15