PNNL-13501 - Pacific Northwest National Laboratory

1.2
BH
B J F
FP
1
F
B
H
JP
0.8
0.6
0.4
0.2 GC
Å
ES
BF
F
H B
JP
H
JP
G
Å
C
ES
GÅ
C
ES
B
F
BG
H
FÅ
JP
H
GÅ
C
JE
PS
C
ES
G
Å
G
Å
C
C ES
BE
S
F
B
H F
JP
H
JP
G
G Å
Å
C
C S
S E
E
B
F B
H F
J
P
H
J
P
G G G
G
G
Å Å Å Å Å
CS
CS
CS
CS
CS
E E E
E
E
B
F B
B
HP
F B
J HP
F B
J HP
F
J HP
F
J HP
J
Test at 700ÞC
G G
G
G
G
G
Å
G
Å
G
Å
Å
CS
CS
Å
S
E C S
E C
B , G = LSCo-20
H , C = LSF-20
BJ
, BE
= LSCF-8228
F B
B
HP
F B
JF
, HP
A F=
LSFNi-3020 B
J HP
F B
HP
F B
P , S = LNF-6040
0 GC
EÅ
S
0 0.2 0.4 0.6 0.8 1
0
1.2
Current Density (A/cm 2 )
Figure 1. Effect of cathode material on performance of
400 µm strontium-substituted lanthanum gallat solid oxide
fuel cells
Another goal is to build the capability to manufacture and
test solid oxide fuel cell stacks. During the past year, a
0.3
0.2
0.1
comprehensive cell test stand (consisting of customdesigned
test furnace, electronic load bank, gas handling
equipment, humidifier, and computer) was designed and
built. A prototype planar solid oxide fuel cell stack was
assembled using components fabricated. While the
performance of the stack was disappointing, the test
verified our stack testing capability, and provided several
lessons learned, which will lead to improved stack testing
in the future.
Summary and Conclusions
The development of fabrication techniques for anode
supported electrolytes was successful. Several methods
for the fabrication of ceramic interconnects were
investigated. Both compression molding and injection
molding could be viable processes, but due to the lower
temperature of operation, ceramic interconnects are no
longer being pursued. A number of potential electrode
materials for the lanthanum gallate system were
identified.
Materials Science and Technology 307