Journal
POLYMER
Volume 54, Issue 26, Pages 6918-6928Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2013.10.052
Keywords
Anion exchange membrane; Pendant imidazolium-functionalized polymer; Direct methanol alkaline fuel cell
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Funding
- National Research Foundation of Korea (NRF)
- Korean government (MEST) [2011-0022859]
- Korea Institute of Science and Technology as a part of the E-BANK program in
- National Research Foundation of Korea [2011-0022859] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A series of phenolphthalein-based cardo poly(arylene ether sulfone) (PES) block copolymers containing pendant imidazolium group (PI-PESs) were synthesized as novel anion exchange membranes for direct methanol alkaline fuel cells. These PI-PESs combine the advantages of pendant anion conductors on the polymer side chains with the thermochemical stabilities of the imidazolium group, showing high hydroxide conductivity, together with good physical and chemical stability under basic conditions. The hydroxide conductivity over 0.03 S/cm at 20 degrees C and 0.1 S/cm at 80 degrees C was obtained for the PI-PES membranes. In addition, PI-PES membranes show low permeability to methanol (below 6.74 x 10(-8) cm(2)/s) and very high selectivity (over 3.7 x 10(5) S.s/cm(3)). These properties make the PI-PESs promising candidate materials for anion exchange membranes for direct methanol alkaline fuel cells. (C) 2013 Elsevier Ltd. All rights reserved.
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