Back to Search
Start Over
Positronium Formation in Aromatic Polymer Electrolytes for Fuel Cells.
- Source :
-
Journal of Physical Chemistry B . Apr2009, Vol. 113 Issue 17, p5698-5701. 4p. - Publication Year :
- 2009
-
Abstract
- We measured the yield of positronium (Ps) in sulfonated aromatic proton conducting membranes for the polymer electrolyte fuel cell (PEFC) with and without −SO2− in their chemical structures by positron annihilation lifetime spectroscopy (PALS). It was observed that Ps formation is almost totally inhibited in the polymers without −SO2− such as sulfonated poly(ether ether ketone) (SPEEK). On the other hand Ps favorably forms in those with −SO2− as sulfonated polyether sulfone (SPES), which is due to the anti-inhibition effect of −SO2−. The high probability of Ps formation in these polymers enables the study of the free volume and the mechanism of gas permeation by PALS. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15206106
- Volume :
- 113
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- Journal of Physical Chemistry B
- Publication Type :
- Academic Journal
- Accession number :
- 38222470
- Full Text :
- https://doi.org/10.1021/jp901471m