Synthesis and characterization of novel anion exchange membranes containing bi-imidazolium-based ionic liquid for alkaline fuel cells

Synthesis and characterization of novel anion exchange membranes containing bi-imidazolium-based... Novel anion-exchange membranes (AEMs) were prepared via in situ assembly of N-dodecyl-imidazole and 1,4-dibromobutane to construct the bi-imidazolium functionalized cationic liquid monomer, butanediyl-1,4-bis(N-dodecylimidazole bromide) into the isopropanol dispersions of quaternized chitosan, and followed by anion exchange with OH−. The morphology and characteristic properties of the resultant membranes, such as ion exchange capacity (IEC), anionic conductivity, and chemical stability were investigated. The membrane containing 15% mass fraction of butanediyl-1, 4-bis(N-dodecylimidazole bromide) shows that the anionic conductivity at 80°C up to 41.9mScm−1 and keep better long-term stability for 300h in 1moldm−3 KOH methanol solution than in 1moldm−3 KOH aqueous solution. The introduction of hydrophobic alkyl side chain of the imidazole rings could drive the N+ ionic clusters to aggregate and promoting OH− mobility in AEMs. The results of this study suggest that the AEMs based on bi-imidazolium cations with long alkyl side chain have good perspectives for alkaline fuel cell application. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Solid State Ionics Elsevier

Synthesis and characterization of novel anion exchange membranes containing bi-imidazolium-based ionic liquid for alkaline fuel cells

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier B.V.
ISSN
0167-2738
eISSN
1872-7689
D.O.I.
10.1016/j.ssi.2015.06.010
Publisher site
See Article on Publisher Site

Abstract

Novel anion-exchange membranes (AEMs) were prepared via in situ assembly of N-dodecyl-imidazole and 1,4-dibromobutane to construct the bi-imidazolium functionalized cationic liquid monomer, butanediyl-1,4-bis(N-dodecylimidazole bromide) into the isopropanol dispersions of quaternized chitosan, and followed by anion exchange with OH−. The morphology and characteristic properties of the resultant membranes, such as ion exchange capacity (IEC), anionic conductivity, and chemical stability were investigated. The membrane containing 15% mass fraction of butanediyl-1, 4-bis(N-dodecylimidazole bromide) shows that the anionic conductivity at 80°C up to 41.9mScm−1 and keep better long-term stability for 300h in 1moldm−3 KOH methanol solution than in 1moldm−3 KOH aqueous solution. The introduction of hydrophobic alkyl side chain of the imidazole rings could drive the N+ ionic clusters to aggregate and promoting OH− mobility in AEMs. The results of this study suggest that the AEMs based on bi-imidazolium cations with long alkyl side chain have good perspectives for alkaline fuel cell application.

Journal

Solid State IonicsElsevier

Published: Oct 1, 2015

References

  • J. Power Sources
    Nakagawa, N.; Xiu, Y.K.
  • J. Power Sources
    Zhou, J.F.; Unlu, M.; Vega, J.A.
  • Int. J. Pharm.
    Wu, J.; Su, Z.G.; Ma, G.H.
  • Tetrahedron
    Jahnke, M.C.; Hussain, M.; Hupka, F.

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