Hardjo, E F and Monder, D S and Karan, K
(2014)
An Effective Property Model for Infiltrated Electrodes in Solid Oxide Fuel Cells.
Journal of The Electrochemical Society, 161 (1).
F83-F93.
ISSN 0013-4651
Full text not available from this repository.
(
Request a copy)
Abstract
An effective property model for infiltrated electrodes is reported that predicts the dependence of effective electronic conductivity
and active TPB length on experimentally controllable and measurable parameters. The model uses results from percolation theory
and geometric arguments to compute the properties of Ni-infiltrated anodes of solid oxide fuel cells. While the predicted electronic
conductivity is comparable to that for a typical composite Ni anode, the predicted effective TPB length is approximately two orders
of magnitude higher for a Ni infiltrated anode with a Ni volume fraction of less than 10%. The predictions of the developed model are
compared and validated against three independent experimental datasets. Parametric studies using this model suggest that decreasing
the particle sizes of the infiltrated film and the substrate, as well as the substrate porosity will increase the active TPB length.
While decreasing substrate particle size also increases the effective electronic conductivity of the electrode, decreasing substrate
porosity has the opposite effect. Finally, a methodology is presented to quantitatively relate an experimentally observed degradation
in effective electronic conductivity of infiltrated electrodes to a reduction in active TPB length as a function of time.
Actions (login required)
 |
View Item |
Altmetric
Altmetric