The influence of water vapor in air on power generation characteristic of solid oxide fuel cells was analyzed by measuring cell voltage at a constant current density, as a function of water vapor concentration at 800°C and 1000°C⁠. Cell voltage change was negligible at 1000°C⁠, while considerable voltage drop was observed at 800°C accelerated at high water vapor concentrations of 20 wt % and 40 wt %⁠. It is considered that La2O3 formed on the (La0.8Sr0.2)0.98MnO3 surface, which is assumed to be the reason for a large voltage drop.

Issue Section:
Research Papers
Keywords:
SOFC, cathode, humidity, degradation, current density, electrochemical electrodes, solid oxide fuel cells
Topics:
Solid oxide fuel cells, Water vapor, Current density, Electrodes
1.
Sasaki
,
K.
,
Watanabe
,
K.
,
Shiosaki
,
K.
,
Susuki
,
K.
, and
Teraoka
,
Y.
, 2004, “
Multi-Fuel Capability of Solid Oxide Fuel Cells
,”
J. Electroceram.
1385-3449,
13
, pp.
669
–
675
.
Crossref
Search ADS
 
2.
Boudghene Stambouli
,
A.
, and
Traversa
,
E.
, 2002, “
Solid Oxide Fuel Cells (SOFCs): A Review of an Environmentally Clean and Efficient Source of Energy
,”
Renewable Sustainable Energy Rev.
1364-0321,
6
, pp.
433
–
455
.
Crossref
Search ADS
 
3.
Kawada
,
T.
, and
Yokokawa
,
H.
, 1997, “
Materials and Characterization of Solid Oxide Fuel Cell
,”
Key Eng. Mater.
1013-9826,
125–126
, pp.
187
–
248
.
4.
Shao
,
Z.
, and
Haile
,
S. M.
, 2004, “
A High-Performance Cathode for the Next Generation of Solid-Oxide Fuel Cells
,”
Nature (London)
0028-0836,
431
, pp.
170
–
173
.
Crossref
Search ADS
 
5.
Sakai
,
N.
,
Yamaji
,
K.
,
Horita
,
T.
,
Xiong
,
Y. P.
,
Kishimoto
,
H.
, and
Yokokawa
,
H.
, 2004, “
Significant Effect of Water on Surface Reaction and Related Electrochemical Properties of Mixed Conducing Oxides
,”
Solid State Ionics
0167-2738,
175
, pp.
387
–
391
.
Crossref
Search ADS
 
6.
Raz
,
S.
,
Sasaki
,
K.
,
Maier
,
J.
, and
Riess
,
I.
, 2001, “
Characterization of Adsorbed Water Layers on Y2O3-Doped ZrO2
,”
Solid State Ionics
0167-2738,
143
, pp.
181
–
204
.
Crossref
Search ADS
 
7.
Ishihara
,
T.
,
Fukui
,
S.
, and
Matsumoto
,
H.
, 2005, “
Effects of Water Coexisting on the Cathode Activity for the Solid Oxide Fuel Cells Using LaGaO3-Based Perovskite Oxide Electrolyte
,”
J. Electrochem. Soc.
0013-4651,
152
(
10
), pp.
A2035
–
A2039
.
Crossref
Search ADS
 
8.
Sakai
,
N.
,
Yamaji
,
K.
,
Horita
,
T.
,
Xiong
,
Y.
,
Kishimoto
,
H.
, and
Yokokawa
,
H.
, 2004, “
Effect of Water on Electrochemical Oxygen Reduction at the Interface Between Fluorite-Type Oxide-Ion Conductors and Various Types of Electrodes
,”
Solid State Ionics
0167-2738,
174
, pp.
103
–
109
.
Crossref
Search ADS
 
9.
Mitterdorfer
,
A.
, and
Gauckler
,
L. J.
, 1998, “
La2Zr2O7 Formation and Oxygen Reduction Kinetics of the La0.85Sr0.15MnyO3, O2(g)YSZ
,”
Solid State Ionics
0167-2738,
111
, pp.
185
–
218
.
Crossref
Search ADS
 
10.
van Roosmalen
,
J. A. M.
, and
Cordfunke
,
E. H. P.
, 1992, “
Chemical Reactivity and Inter Diffusion of (La,Sr)MnO3 and (Zr,Y)O2, Solid Oxide Fuel Cell Cathode and Electrolyte Materials
,”
Solid State Ionics
0167-2738,
52
, pp.
303
–
312
.
Crossref
Search ADS
 
11.
Vincent Crist
,
B.
, 2000,
Handbook of Monochromatic XPS Spectra
, The Elements of Native Oxides,
John Wiley & Sons, Inc.
,
Hoboken, NJ
, Vol.
5
.
12.
Wua
,
Q. H.
,
Meilin Liua
,
T.
, and
Jaegermann
,
W.
, 2005, “
X-Ray Photoelectron Spectroscopy of La0.5Sr0.5MnO3
,”
Mater. Lett.
0167-577X,
59
, pp.
1980
–
1983
.
Crossref
Search ADS
 
13.
Gunasekaran
,
N.
,
Rajadurai
,
S.
,
Carberry
,
J. J.
,
Bakshi
,
N.
, and
Alcock
,
C. B.
, 1994, “
Surface Characterization and Catalytic Properties of La1−xAxMO3, Perovskite Type Oxides. Part I. Studies on La0.95Ba0.55MO3 (M=Mn, Fe or Co) Oxides
,”
Solid State Ionics
0167-2738,
73
, pp.
289
–
295
.
Crossref
Search ADS
 
14.
Tuller
,
H. L.
, 1981,
Nonstoichiometric Oxides
,
O. T.
Sørensen
 ed.,
Academic
,
New York
, p.
271
.
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