Back to Search Start Over

Positronium Formation in Aromatic Polymer Electrolytes for Fuel Cells.

Authors :
Y. Kobayashi
Hamdy F. M. Mohamed
A. Ohira
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