Preparation and characterization of CPPO/BPPO blend membranes for potential application in alkaline direct methanol fuel cell |
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Authors: | Liang Wu Tongwen Xu Dan Wu Xin Zheng |
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Institution: | aFunctional Membrane Laboratory, School of Chemistry and Material Science, University of Science and Technology of China (USTC), Hefei, Anhui 230026, PR China |
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Abstract: | A series of hydroxyl-conducting anion-exchange membranes were prepared by blending chloroacetylated poly(2,6-dimethyl-1,4-phenylene oxide) (CPPO) with bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO), and their fuel cell-related performances were evaluated. The resulting membranes exhibited high hydroxyl conductivities (0.022–0.032 S cm?1 at 25 °C) and low methanol permeability (1.35 × 10?7 to 1.46 × 10?7 cm2 s?1). All the blend membranes proved to be miscible or partially miscible under the investigations of scanning electron microscopy (SEM) and differential scanning calorimeters (DSC). By condition optimization, the blend membranes with 30–40 wt% CPPO are recommended for application in direct methanol alkaline fuel cells because they showed low methanol permeability, excellent mechanical properties and comparatively high hydroxyl conductivity. |
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Keywords: | Poly(2 6-dimethyl-1 4-phenylene oxide) (PPO) Blend membrane Hydroxyl ion conductivity Methanol permeability Alkaline fuel cell |
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