Polybenzimidazolium-based solid electrolytes

Dirk Henkensmeier, Hyoung Juhn Kim, Hye Jin Lee, Dong Hoon Lee, In Hwan Oh, Seong Ahn Hong, SukWoo Nam, Tae Hoon Lim

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

A series of methyl, benzyl, and mixed polybenzimidazolium halides was synthesised and characterised by NMR spectroscopy. Membranes were formed and ion exchanged with hydroxides. These membranes are of interest for use in potentially platinum-free anionic exchange membrane fuel cells. Crosslinked membranes were obtained by the addition of α,α′-dibromo-p- xylene to the casting solution. The ion conductivity of membranes was determined by impedance spectroscopy. A hydroxide conductivity of 29 mS · cm -1 at 26 °C and 58 mS · cm-1 at 60 °C was obtained. The thermal and hydrolytic stability was investigated and a pathway for hydrolytic degradation proposed. Hydroxide ions react at the 2 position, the intermediate carbinol opens to the amine-amide, and further degrades under chain scission to diamine and carboxylic acid.

Original languageEnglish
Pages (from-to)899-908
Number of pages10
JournalMacromolecular Materials and Engineering
Volume296
Issue number10
DOIs
Publication statusPublished - 2011 Oct 12
Externally publishedYes

Fingerprint

Solid electrolytes
Membranes
Ions
Hydroxides
Diamines
Xylene
Carboxylic Acids
Platinum
Carboxylic acids
Amides
Nuclear magnetic resonance spectroscopy
Amines
Methanol
Fuel cells
Casting
Spectroscopy
Degradation
hydroxide ion

Keywords

  • anionic exchange membranes
  • degradation
  • membranes
  • polybenzimidazole
  • polymer electrolyte fuel cells (PEFC)

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

Cite this

Henkensmeier, D., Kim, H. J., Lee, H. J., Lee, D. H., Oh, I. H., Hong, S. A., ... Lim, T. H. (2011). Polybenzimidazolium-based solid electrolytes. Macromolecular Materials and Engineering, 296(10), 899-908. https://doi.org/10.1002/mame.201100100

Polybenzimidazolium-based solid electrolytes. / Henkensmeier, Dirk; Kim, Hyoung Juhn; Lee, Hye Jin; Lee, Dong Hoon; Oh, In Hwan; Hong, Seong Ahn; Nam, SukWoo; Lim, Tae Hoon.

In: Macromolecular Materials and Engineering, Vol. 296, No. 10, 12.10.2011, p. 899-908.

Research output: Contribution to journalArticle

Henkensmeier, D, Kim, HJ, Lee, HJ, Lee, DH, Oh, IH, Hong, SA, Nam, S & Lim, TH 2011, 'Polybenzimidazolium-based solid electrolytes', Macromolecular Materials and Engineering, vol. 296, no. 10, pp. 899-908. https://doi.org/10.1002/mame.201100100
Henkensmeier D, Kim HJ, Lee HJ, Lee DH, Oh IH, Hong SA et al. Polybenzimidazolium-based solid electrolytes. Macromolecular Materials and Engineering. 2011 Oct 12;296(10):899-908. https://doi.org/10.1002/mame.201100100
Henkensmeier, Dirk ; Kim, Hyoung Juhn ; Lee, Hye Jin ; Lee, Dong Hoon ; Oh, In Hwan ; Hong, Seong Ahn ; Nam, SukWoo ; Lim, Tae Hoon. / Polybenzimidazolium-based solid electrolytes. In: Macromolecular Materials and Engineering. 2011 ; Vol. 296, No. 10. pp. 899-908.
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