Methanol barriers derived from layer-by-layer assembly of poly(ethersulfone)s for high performance direct methanol fuel cells

作者：Ok Junglim^*; Kim Dong Wook; Lee Changjin; Choi Won Choon; Cho Sungmin; Kang Yongku

来源：Bulletin of the Korean Chemical Society, 2008, 29(4): 842-846.

• layer-by-layer self-assembly
• poly(ethersulfone)
• Nafion membrane
• direct methanol fuel cells
• methanol permeability

Layer-by-layer assembled multilayers of poly(ethersulfone)s were deposited on the surface of Nation membrane for the application of direct methanol fuel cells (DMFC). Aminated poly(ethersulfone) (APES) and sulfonated poly(ethersulfone) (SPES) were used as a polycation and a polyanion for fabrication of the multilayer films. UV/Vis absorption spectroscopy verified a linear build-up of the multilayers of APES and SPES on the surface of Nafion. Thin multilayer films deposited on the Nafion membrane enabled methanol permeability of the membrane to decrease by 78% in comparison with the pristine Nafion. The performance of DMFCs in concentrated methanol was highly enhanced by using the multilayer modified Nafion.

• 出版日期2008-4-20