Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 12, Issue 4, Pages 607-610Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2010.02.011
Keywords
Direct methanol fuel cell; Proton exchange membrane; Aromatic polymer; Methanol crossover; Acid-base interactions; Blend membranes
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Funding
- Office of Naval Research MURI [N00014-07-1-0758]
- Korea Ministry of Education, Science and Technology [R31-2008-000-10092-0]
- National Natural Science Foundation of China [50973040]
- Ministry of Education, Science & Technology (MoST), Republic of Korea [R31-2008-000-10092-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Novel acid-base blend membranes consisting of acidic sulfophenylated poly(ether ether ketone ketone) (Ph-SPEEKK) and various amounts of basic polysulfone tethered with 5-amino-benzotriazole (PSf-BTraz) have been prepared and characterized. The blend membranes show higher proton conductivity and lower liquid uptake and dimensional swelling compared to plain Ph-SPEEKK and sulfonated poly(ether ether ketone) (SPEEK) membranes. The Ph-SPEEKK/PSf-BTraz blend membranes with optimized basic polymer contents exhibit lower methanol crossover and higher performance with improved stability in direct methanol fuel cells (DMFC) at various methanol concentrations (1-10 M) than plain Ph-SPEEK and Nafion-115 membranes. (C) 2010 Elsevier B.V. All rights reserved.
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