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- W2056826195 abstract "This study reports the development of imidazolium-type alkaline anion exchange membranes (Im-AAEMs) based on the functionalization of bromomethylated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO) using 1-methylimdazole. Aromatic polymers bearing bromomethyl, instead of chloromethyl, functional groups were employed as base materials to avoid complicated chloromethylation which require toxic reagents. 1H NMR and FT-IR spectroscopic data indicated the synthesis of a series of membranes with controlled IECs (achieved by varying the amount of 1-methylimdazole). Due to the conjugated structures of imidazolium cations, the novel Im-AAEMs display enhanced short-term thermal and chemical stabilities compared with classical quaternary ammonium-type AAEMs. In addition, the imidazolium salts exhibit excellent solubility in polar solvents, such as NMP and DMSO, which allowed the exploitation of a pre-functionalized strategy for the synthesis of the AAEMs. Accordingly, the Im-AAEMs displayed conductivities up to >100 mS cm−1 at 80 °C, which derived from the establishment of a nano-scale phase-separated morphology as directed by the solvent casting process. A H2/O2 fuel cell test yielded a peak power density of 30 mW cm−2 at a current density of 76 mA cm−2; this will be improved on development of a chemical compatible imidazolium-based alkaline ionomer for use as ionic polymer binder in the electrodes' catalyst layers." @default.
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- W2056826195 date "2012-10-01" @default.
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- W2056826195 title "Development of imidazolium-type alkaline anion exchange membranes for fuel cell application" @default.
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- W2056826195 doi "https://doi.org/10.1016/j.memsci.2012.05.006" @default.
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