TY - JOUR
T1 - Effect of Ru/CGO versus Ni/CGO Co- Infiltration on the Performance and Stability of STN-Based SOFCs
AU - Ramos, Tania
AU - Veltzé, Sune
AU - Sudireddy, Bhaskar Reddy
AU - Jørgensen, Peter Stanley
AU - Kuhn, Luise Theil
AU - Holtappels, Peter
PY - 2014
Y1 - 2014
N2 - Electrolyte supported cells (ESC), with Sc2O3-stabilized
ZrO2 (ScSZ) electrolytes, Gd-doped ceria (CGO) or M/CGO
(M = Ni, Ru) infiltrated Sr0.94Ti0.9Nb0.1O3 (STN94) anodes
and LSM/YSZ cathodes, were evaluated for their initial performance
and long-term stability. Power density for the
Ru/CGO infiltrated cell reached ∼0.7 W cm–2 at 850 °C, 4%
H2O/H2, whereas the Ni/CGO infiltrated cell reached
∼0.3 W cm–2, with the current morphologies and loadings.
Operation at 0.125 A cm–2, 850 °C, feeding 50% H2O/H2 to
the anode and air to the cathode, for a period >300 h,
showed superior stability for the Ru/CGO infiltrated cell,
with ∼0.04 mV h–1 degradation rate, when compared to the
Ni/CGO infiltrated cell (∼0.5 mV h–1). For the Ni/CGO case,
the observed degradation has been tentatively linked to
initial changes in the electrochemical active area and longterm
detrimental interactions between components.
AB - Electrolyte supported cells (ESC), with Sc2O3-stabilized
ZrO2 (ScSZ) electrolytes, Gd-doped ceria (CGO) or M/CGO
(M = Ni, Ru) infiltrated Sr0.94Ti0.9Nb0.1O3 (STN94) anodes
and LSM/YSZ cathodes, were evaluated for their initial performance
and long-term stability. Power density for the
Ru/CGO infiltrated cell reached ∼0.7 W cm–2 at 850 °C, 4%
H2O/H2, whereas the Ni/CGO infiltrated cell reached
∼0.3 W cm–2, with the current morphologies and loadings.
Operation at 0.125 A cm–2, 850 °C, feeding 50% H2O/H2 to
the anode and air to the cathode, for a period >300 h,
showed superior stability for the Ru/CGO infiltrated cell,
with ∼0.04 mV h–1 degradation rate, when compared to the
Ni/CGO infiltrated cell (∼0.5 mV h–1). For the Ni/CGO case,
the observed degradation has been tentatively linked to
initial changes in the electrochemical active area and longterm
detrimental interactions between components.
KW - Electrocatalysts
KW - Infiltration
KW - Performance
KW - Solid Oxide Fuel Cells
KW - Stability
U2 - 10.1002/fuce.201400013
DO - 10.1002/fuce.201400013
M3 - Journal article
SN - 1615-6846
VL - 14
SP - 1062
EP - 1065
JO - Fuel Cells
JF - Fuel Cells
IS - 6
ER -