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Comparison of alkaline stability of quaternary ammonium- and 1,2-methylimidazolium-based alkaline anion exchange membranes.
- Source :
-
Journal of Membrane Science . Aug2015, Vol. 487, p12-18. 7p. - Publication Year :
- 2015
-
Abstract
- The alkaline stability of 1,2-dimethylimidazolium with various N3-substituents (including butyl, benzyl and vinylbenzyl) and corresponding quaternary ammonium small molecular compounds, and the 1,2-dimethylimidazolium- and quaternary ammonium-based membranes are systemically studied in the same condition. The spectroscopy (such as NMR, FT-IR, XPS and mass spectrum) results of the two kinds of small molecular compounds indicate that the quaternary ammonium cations are more stable than 1,2-dimethylimidazolium cations in 3 M KOH at elevated temperature, especially at 80 °C. Moreover, the alkaline stability of the 1,2-dimethylimidazolium cations would be influenced by the N3-substitutions of the imidazolium, and N3-butyl substituted cation shows a better alkaline stability. The quaternary ammonium-based membrane are also more stable than the 1,2-dimethylimidazolium-based membrane in 1 M KOH at 60 °C. In addition, the performance of the alkaline direct methanol fuel cell using quaternary ammonium-based membrane (22 mW cm −2 ) is much better than that of the fuel cell using 1,2-dimethylimidazolium-based membrane (0.04 mW cm −2 ). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03767388
- Volume :
- 487
- Database :
- Academic Search Index
- Journal :
- Journal of Membrane Science
- Publication Type :
- Academic Journal
- Accession number :
- 102658668
- Full Text :
- https://doi.org/10.1016/j.memsci.2015.03.067