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Updated: Jun 27, 2026
Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
Characterization of Nafion/zirconium sulphophenyl phosphate nanocomposite membrane for direct methanol fuel cells
Young-Sang Kim1, Hyun-Seok Cho, Min-Kyu Song
1Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Korea.
Abstract:
Layered structure zirconium sulphophenyl phosphate (ZrSPP) was prepared from the precipitation of Zr4+ ion and m-sulphophenyl phosphonic (SPP) acid at a mole ratio of P to Zr = 2.0. The reflective index measurement indicated that the methanol permeability of unmodified Nafion 117 was 2.3 x 10(-6) cm2/s at RT while that of the Nafion/ZrSPP membrane (approximately 50 micro/m thick) decreased to 6.5 x 10(-7) cm2/s. Nafion/ZrSPP (10 wt%) nanocomposite membranes delivered constant power output 104 mW/cm2 at 0.4 V under 1 M MeOH/dry air at 70 degrees C even in the wide range of air stoichiometry from 1.5 to 3.0.