Abstract
The sulfonated polyether ether ketone (SPEEK) membranes containing poly(acrylic acid-co-4-vinylimidazole) (poly(AA-co-4VIm)) for low humidity operations in polymer electrolyte membrane fuel cells are focused. The blend membranes with homogeneous morphologies between SPEEK and copolymers are successful based on the hydrogen bond between SO3H or COOH groups and imidazole group observed by FTIR and SEM. The blend membranes also show an improvement in thermal stability as compared with SPEEK. IEC and proton conductivity of the blend membranes are increased with an increase of the acrylic acid content in poly(AA-co-4VIm). The dimensional stability of the blend membranes is significantly improved as evaluated by the swelling ratio. The present work shows how polymer chain with proton donor and acceptor functional groups plays an important role in enhancing proton conductivity together with other membrane properties.
Original language | English (US) |
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Pages (from-to) | 10384-10391 |
Number of pages | 8 |
Journal | International Journal of Hydrogen Energy |
Volume | 36 |
Issue number | 16 |
DOIs | |
State | Published - Aug 2011 |
Keywords
- 4-Vinylimidazole
- Acrylic acid
- Polymer electrolyte membrane
- Proton conductivity
- Sulfonated (polyether ether ketone)
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology