Journal
MATERIALS LETTERS
Volume 219, Issue -, Pages 131-133Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.02.082
Keywords
Polybenzimidazole; Anion conductive membrane; AEM fuel cell; Ion conductivity; Montmorillonite; Composites
Funding
- Bulgarian National Science Fund [DFNI E02/9]
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One of the best materials for preparation of ion conductive membranes is poly[2,2'-(p-phenylene)-5,5'-bisbenzimidazole] denoted p-PBI. Here we report the preparation of potassium hydroxide doped p-PBI membranes, loaded with high concentrations of montmorillonite and discuss some of their properties. The doped PBI membranes, containing filler, show considerable increase of the anion conductivity as well as improvement of mechanical properties, compared to pristine p-PBI doped with potassium hydroxide. For the membrane, containing 100 wt% montmorillonite, anion conductivity of 1465 mS. cm(-1) was measured. This value is approaching the anion conductivity of the dopant -50% water solution of potassium hydroxide. The improvement of the anion conductivity has to be attributed to the electrolyte, trapped in the montmorillonite channels. (C) 2018 Elsevier B. V. All rights reserved.
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