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@INPROCEEDINGS{Sick:843619,
author = {Sick, Kathrin and Grigorev, Nikita and Menzler, Norbert H.
and Guillon, Olivier},
title = {{D}evelopment of cathode contacting for {SOFC} stacks},
reportid = {FZJ-2018-01201},
year = {2018},
abstract = {In SOFC stacks the electrical contact between the ceramic
cathode layer and the metallic interconnector (IC) has to be
adjusted carefully to minimize the contact resistance and
slow down degradation mechanisms. In JÜLICH, ICs made of
Crofer22APU are coated with a MnCo1.9Fe0.1O4 spinel (MCF),
applied by atmospheric plasma spraying (APS), which
successfully prevents the diffusion of volatile Cr species
from the steel into the cell. Materials for the cathode
contact layer have to be sufficiently good electronic
conductors, stable in oxidizing atmosphere, chemically
stable and compatible with the adjacent layers, and show a
thermal expansion behavior similar to MCF and the cathode
material, i. e. La0.58Sr0.4Co0.2Fe0.8O3-x (LSCF).To obtain
an optimal contact layer, different aspects such as material
properties, microstructure, and processing have to be
considered. Here we compare various materials regarding
their electrical conductivity and compatibility with each
other and discuss different processing routes for the
application of the cathode contact layer. DC conductivity
measurements and scanning electron microscopy (SEM) imaging
give information on the correlation of material properties
and microstructure. We conclude that an LSCF contact layer
with coarse porosity on top of the fine structured LSCF
cathode is the most suitable contacting for JÜLICH SOFC
stacks.},
month = {Jan},
date = {2018-01-21},
organization = {42nd International Conference and Expo
on Advanced Ceramics and Composites,
Daytona Beach, Florida (USA), 21 Jan
2018 - 26 Jan 2018},
subtyp = {After Call},
cin = {IEK-1},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {135 - Fuel Cells (POF3-135) / SOFC - Solid Oxide Fuel Cell
(SOFC-20140602)},
pid = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)SOFC-20140602},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/843619},
}