Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 423, Issue -, Pages 113-127Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2012.07.038
Keywords
Polymer electrolytes; Hydrocarbon polymers; Stabilization; Covalent; Ionic; PEMFC
Categories
Funding
- The EU-FP7 (FCH-JU) project LoLiPEM-Long-life PEM-FCH &CHP systems at temperatures higher than 100 degreesC [GA 245339]
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Sulfonated aromatic polymers (SAP) are promising inexpensive polymer electrolyte membranes for fuel cells, but there still exist some challenges about this kind of materials including excessive swelling in water, poor mechanical strength, low dimensional stability, especially for highly sulfonated SAP. Crosslinking is widely proposed as an efficient strategy to deal with these challenges. Here, the state-of-the-art of crosslinked SAP is reviewed and some prospects for further development are outlined. The following points are addressed: (i) Crosslinked SAP via covalent bonds, including esterification, addition, Friedel-Crafts reactions and formation of -SO2- bridges; (ii) crosslinked SAP by ionic bonds; (iii) combined covalent and ionic crosslinking. (c) 2012 Elsevier B.V. All rights reserved.
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