Speakers
Dr
Sandor Balog
(Adolphe Merkle Institute, University of Fribourg)Dr
Urs Gasser
(PSI / LNS)
Description
We present a SANS study of radiation-grafted fuel cell membranes
containing styrenesulfonic acid. The influence of the nano-structure
of the aqueous phase on the proton conductivity is studied.
We model the structure of the aqueous phase using a stochastic approach and estimate the tortuosity of the aqueous phase via the self-diffusion of a Brownian walker. We find a strong dependence of the tortuosity on the volume fraction of the aqueous phase. The long-range proton diffusion clearly correlates with tortuosity and is found to govern the proton conductivity.
Primary author
Dr
Sandor Balog
(Adolphe Merkle Institute, University of Fribourg)
Co-authors
Dr
Lorenz Gubler
(PSI / ECL)
Dr
Urs Gasser
(PSI / LNS)
