Silica is a well-known impurity in solid oxide fuel cell raw materials, namely NiO and yttria-stabilized zirconia (YSZ). At elevated temperatures silica will migrate to the grain boundaries, form insulating siliceous phases, and lead to a decrease in the ionic conductivity of the electrolyte. Furthermore, silica impurities have been shown to damage the anode/electrolyte interface, such that an overall decrease in cell performance and long-term stability is observed. Despite the fact that silica is ubiquitous in commercial-grade raw materials and can be incorporated from several extrinsic sources, it has negative effects on the solid oxide fuel cell, such that any further contamination should be avoided to prevent performance degradation and eventual cell failure. This paper reviews and outlines the sources and effects of silica on the solid oxide fuel cell, and attempts to determine a guideline for acceptable levels of silica contamination.
References
1.
Gerven
, R. J. F. van
, 2003, “System and Applications,” High Temperature Solid Oxide Fuel Cells: Fundamentals, Design, and Applications
, S. C.
Singhal
and K.
Kendall
, eds., Elsevier Science Ltd.
, pp. 363
–392
. 2.
IEA, International Energy Agency, and OECD, Organization for Economic Co-operation and Development, 2004, Renewable Energy: Market & Policy Trends in IEA Countries, OECD/IEA, Paris, France, pp.
6
, 56, 198–202. 3.
Fontell
, E.
, Phan
, T.
, Kivisaari
, T.
, and Keränen
, K.
, 2006, “Solid Oxide Fuel Cell System and the Economical Feasibility
,” J. Fuel Cell Sci. Technol.
, 3
, pp. 242
–253
. 4.
Karakoussis
, V.
, Leach
, M.
, Vorst
, R. V. D.
, Hart
, D.
, Lane
, J.
, Pearson
, P.
, and Kilner
, J.
, 2000, “Environmental Emissions of SOFC and SPFC System Manufacture and Disposal
,” Report No. F/01/00164/REP, Imperial College, UK London. 5.
Armand
, M.
, and Tarascon
, J. -M
., 2008, “Building Better Batteries
,” Nature
, 451
(7
), pp. 652
–657
. 6.
7.
Yamamoto
, O.
, 2000, “Solid Oxide Fuel Cells: Fundamental Aspects and Prospects
,” Electrochim. Acta
, 45
(15–16
), pp. 2423
–2435
. 8.
Singhal
, S. C.
, 2002, “Solid Oxide Fuel Cells for Stationary, Mobile, and Military Applications
,” Solid State Ionics
, 152–153
, pp. 504
–410
. 9.
Williams
, M. C.
, Strakeya
, J. P.
, Surdovala
, W. A.
, and Wilson
, L. C.
, 2006, “Solid Oxide Fuel Cell Technology Development in the U.S.
,” Solid State Ionics
, 177
(19–25
), 2006 pp. 2039
–2044
. 10.
Shao
, Z.
, Haile
, S. M.
, 2004, “A High-Performance Cathode for the Next Generation of Solid-Oxide Fuel Cells
,” Nature
, 431
(7005
), pp. 170
–173
. 11.
Tao
, S.
, and Irvine
, J. T. S.
, 2003, “A Redox-Stable Efficient Anode for Solid-Oxide Fuel Cells
,” Nature Mater.
, 2
, pp. 320
–323
. 12.
McIntosh
, S.
, and Gorte
, R. J.
, 2004, “Direct Hydrocarbon Solid Oxide Fuel Cells
,” Chem. Rev.
, 104
, pp. 4845
–4865
. 13.
Steele
, B. C. H.
, 2001, “Material Science and Engineering: The Enabling Technology for the Commercialization of Fuel Cell Systems
,” J. Mater. Sci.
, 36
(5
), pp. 1053
–1068
. 14.
Steele
, B. C. H.
, and Heinzel
, A.
, 2001, “Materials for Fuel-Cell Technologies
,” Nature
, 414
, pp. 345
–352
. 15.
Steele
, B. C. H.
, 2000, “Appraisal of Ce1−yGdyO2−y/2 Electrolytes for IT-SOFC Operation at 500°C
,” Solid State Ionics
129
, pp. 95
–110
. 16.
Singh
, P
, and Minh
, N. Q.
, 2005, “Solid Oxide Fuel Cells: Technology Status
,” International J. Appl. Ceram. Technol.
, 1
(1
), pp. 5
–15
. 17.
Horita
, T.
, Kishimoto
, H.
, Yamaji
, K.
, Brito
, M. E.
, Xiong
, Y.
, Yokokawa
, H.
, Hori
, Y.
, and Miyachi
, I.
, 2009, “Effects of Impurities on the Degradation and Long-Term Stability for Solid Oxide Fuel Cells
,” J. Power Sources
, 193
, pp. 194
–198
. 18.
Figueiredo
, F. M. L.
, Kharton
, V. V.
, and Marques
, F. M. B.
, 2008, “Heterogeneous Ceramics Formed by Grain Boundary Engineering
,” Ionics
14
, pp. 349
–356
. 19.
Guo
, X.
, and Waser
, R.
, 2006, “Electrical Properties of the Grain Boundaries of Oxygen ion Conductors: Acceptor-doper Zirconia and Ceria
,” Prog. Mater. Sci.
, 51
, pp. 151
–210
. 20.
Verkerk
, M. J.
, Winnubst
, A. J. A.
, and Burggraaf
, A. J.
, 1982, “Effect of Impurities on Sintering and Conductivity of Yttria-stabilized Zirconia
,” J. Mater. Sci.
, 17
, pp. 3113
–3122
. 21.
Badwal
, S. P. S.
, and Drennan
, J.
, 1987, “Yttria-zirconia: Effect of Microstructure on Conductivity
,” J. Mater. Sci.
, 22
, pp. 3231
–3239
. 22.
Mecartney
, M. L.
, 1987, “Influence of an Amorphous Second Phase on the Properties of Yttria-stabilized Tetragonal Zirconia Polycrystals Y-TZP
,” J. Am. Ceram. Soc.
, 70
(1
), pp. 54
–58
. 23.
Badwal
, S. P. S.
, and Drennan
, J.
, 1989, “Grain Boundary Resistivity in Y-TZP Materials as a Function of Thermal History
,” J. Mater. Sci.
, 24
, pp. 88
–96
. 24.
Jacobson
, N. S.
, Opila
, E. J.
, Myers
, D. L.
, and Copland
, E. H.
, 2005, “Thermodynamics of Gas Phase Species in the Si–O–H System
,” J. Chem. Thermodyn.
, 37
, pp. 1130
–1137
. 25.
Butler
, E. P.
, and Drennan
, J.
, 1982, “Microstructural Analysis of Sintered High-Conductivity Zirconia With Al2O3 Additions
,” J. Am. Ceram. Soc.
, 65
(10
), pp. 474
–478
. 26.
Dong
, Q.
, Du
, Z. H.
, Zhang
, T. S.
, Lu
, J.
, Song
, X. C.
, and Ma
, J.
, 2009, “Sintering and Ionic Conductivity of 8YSZ and CGO10 Electrolytes With Small Addition of Fe2O3: A Comparative Study
,” Int. J. Hydrogen Energy
, 34
, pp. 7903
–7909
. 27.
Dudek
, M.
, 2008, “Composite Oxide Electrolytes for Electrochemical Devices
,” Adv. Mater. Sci.
, 8
(1
), pp. 15
–30
. 28.
Zhang
, T.
, Zeng
, Z.
, Huang
, H.
, Hing
, P.
, and Kilner
, J.
, 2002, “Effect of Alumina Addition on the Electrical and Mechanical Properties of Ce0:8Gd0.2O2−d Ceramics
,” Mater. Lett.
, 57
, pp. 124
–129
. 29.
Tao
, S.
, and Irvine
, J. T. S.
, 2001, “Preparation and Characterization of Apatite-Type Lanthanum Silicates by a Sol–Gel Process
,” Mater. Res. Bull.
36
, pp. 1245
–1258
. 30.
Beekmans
, N. M.
, and Heyne
, L.
, 1976, “Correlation Between Impedance, Microstructure and Composition of Calcia-Stabilized Zirconia
,” Electrochim. Acta
21
, pp. 303
–310
. 31.
Zhang
, T. S.
, Ma
, J.
, Kong
, L. B.
, Chan
, S. H.
, Hing
, P.
, and Kilner
, J. A.
, “Iron Oxide as An Effective Sintering Aid and A Grain Boundary Scavenger for Ceria-Based Electrolytes
,” Solid State Ionics
167
, pp. 203
–207
(2004). 32.
Nakayama
, S.
, Kageyama
, T.
, Aono
, H.
, and Sadaoka
, Y.
, 1995, “Ionic Conductivity of Lanthanoid Silicates, Ln10(SiO4)6O3 (Ln = La, Nd, Sm, Gd, Dy, Y, Ho, Er and Yb)
,” J. Mater. Chem.
5
, pp. 1801
–1805
. 33.
Feighery
, A. J
., and Irvine
, J. T. S.
, 1999, “Effect of Alumina Additions upon Electrical Properties of 8 mol.% Yttria-Stabilised Zirconia
,” Solid State Ionics
, 121
, pp. 209
–216
. 34.
Mori
, M.
, Abe
, T.
, Itoh
, H.
, Yamamoto
, O.
, Takeda
, Y.
, and Kawahara
, T.
, 1994, “Cubic-Stabilized Zirconia and Alumina Composites as Electrolytes in Planar Type Solid Oxide Fuel Cells
,” Solid State Ionics
, 74
(3–4
), pp. 157
–164
. 35.
Hughes
, A. E.
, and Sexton
, B. A.
, 1989, “XPS Study of an Intergranular Phase in Yttria-Zirconia
,” J. Mater. Sci.
, 24
, pp. 1057
–1061
. 36.
Badwal
, S. P. S.
, and Drennan
, J.
, 1990, “Evaluation of Conducting Properties of Yttria-Zirconia Wafers
,” Solid State Ionics
, 40/41
, pp. 869
–873
. 37.
Badwal
, S. P. S.
, Ciacchi
, F. T.
, and Hannink
, R. H. J.
, 1990, “Relationship Between Phase Stability and Conductivity of Yttria Tetragonal Zirconia
,” Solid State Ionics
, 40/41
, pp. 882
–885
. 38.
Hughes
, A. E.
, and Badwal
, S. P. S.
, 1991, “Impurity and Yttrium Segregation in Yttria-Tetragonal Zirconia
,” Solid State Ionics
, 46
, pp. 265
–274
. 39.
Badwal
, S. P. S.
, 1992, “Zirconia-Based Solid Electrolytes: Microstructure, Stability and Ionic Conductivity
,” Solid State Ionics
, 52
, pp. 23
–32
. 40.
Badwal
, S. P. S.
, and Rajendran
, S.
, 1994, “Effect of Micro- and Nano-Structures on the Properties of Ionic Conductors
,” Solid State Ionics
, 70–71
, pp. 83
–95
. 41.
Ciacchi
, F. T.
, Crane
, K. M.
, and Badwal
, S. P. S.
, 1994, “Evaluation of Commercial Zirconia Powders for Solid Oxide Fuel Cells
,” Solid State Ionics
, 73
, pp. 49
–61
. 42.
Gödickemeier
, M.
, Michel
, B.
, Orliukas
, A.
, Bohac
, P.
, Sasaki
, K.
, Gauckler
, L.
, Heinrich
, H.
, Schwander
, P.
, Kosotorz
, G.
, Hofmann
, H.
, and Frei
, O.
, 1994, “Effect of Intergranular Glass Films on the Electrical Conductivity of 3Y-TZP
,” J. Mater. Res.
, 9
, pp. 1228
–1240
. 43.
Guo
, X.
, and Yuan
, R.-Z.
, 1995, “On the Grain Boundaries of ZrO2-based Solid Electrolyte
,” Solid State Ionics
, 80
, pp. 159
–166
. 44.
Aoki
, M.
, Chiang
, Y.-M.
, Kosacki
, I.
, Lee
, L. J.-R. J.-R.
, Tuller
, H.
, and Liu
, Y.
, 1996, “Solute Segregation and Grain-Boundary Impedance in High-Purity Stabilized Zirconia
,” J. Am. Ceram. Soc.
, 79
(5
), pp. 1169
–1180
. 45.
Rodrigues
, M. S.
, Labrincha
, J. A.
, and Marques
, F. M. B.
, 1997, “Study of Yttria-Stabilized Zirconia-Glass Composites by Impedance Spectroscopy
,” J. Electrochem. Soc.
, 144
(12
), pp. 4303
–4309
. 46.
Badwal
, S. P. S.
, Ciacchi
, F. T.
, and Zelizko
, V.
, 1998, “The Effect of Alumina Addition on the Conductivity, Microstructure and Mechanical Strength of Zirconia–Yttria Electrolytes
,” Ionics
, 4
, pp. 25
–32
. 47.
Rodrigues
, C. M. S.
, Labrincha
, J. A.
, and Marques
, F. M. B.
, 1998, “Monitoring of the Corrosion of YSZ by Impedance Spectroscopy
,” J. Eur. Ceram. Soc.
, 18
, pp. 95
–104
. 48.
Appel
, C. C.
, and Bonanos
, N.
, 1999, “Structural and Electrical Characterisation of Silica-Containing Yttria-Stabilized Zirconia
,” J. Eur. Ceram. Soc.
, 19
, pp. 847
–851
. 49.
Badwal
, S. P. S.
, and Ciacchi
, F. T.
, 2000, “Oxygen-Ion Conducting Electrolyte Materials for Solid Oxide Fuel Cells
,” Ionics
, 6
(1–2
), pp. 1
–21
. 50.
Lee
, J.-H.
, Mori
, T.
, Li
, J.-G.
, Ikegami
, T.
Komatsu
, M.
, and Haneda
, H.
, 2000, “Improvement of Grain-Boundary Conductivity of 8 mol% Yttria-Stabilized Zirconia by Precursor Scavenging of Siliceous Phase
,” J. Electrochem. Soc.
, 147
(7
), pp. 2822
–2829
. 51.
Vels Jensen
, K.
, Primdahl
, S.
, Chorkendorff
, I.
, and Mogensen
, M.
, 2001, “Microstructural and Chemical Changes at the Ni/YSZ Interface
,” Solid State Ionics
, 144
, pp. 197
–209
. 52.
Vels Jensen
, K.
, Wallenberg
, R.
, Chorkendorff
, I.
, and Mogensen
, M.
, 2003, “Effect of Impurities on Structural and Electrochemical Properties of the Ni-YSZ Interface
,” Solid State Ionics
, 160
, pp. 27
–37
. 53.
Martin
, M. C.
, and Mecartney
, M. L.
, 2003, “Grain Boundary Ionic Conductivity of Yttrium Stabilized Zirconia as a Function of Silica Content and Grain Size
,” Solid State Ionics
, 161
, pp. 67
–79
. 54.
Petot-Ervas
, G.
, Petot
, C. M.
, Raulot
, J.
, Kusinski
, J.
, Sproule
, I.
, and Graham
, M.
, 2003, “Role of the Microstructure on the Transport Properties of Y-Doped Zirconia and Gd-Doped Ceria
,” Ionics
, 9
, pp. 195
–201
. 55.
Hansen
, K. V.
, Norrman
, K.
, and Mogensen
, M.
, 2004, “H2-H2O-Ni-YSZ Electrode Performance
,” J. Electrochem. Soc.
, 151
(9
), pp. A1436
–A1444
. 56.
Schmidt
, M. S.
, Hansen
, K. V.
, Norrman
, K.
, and Mogensen
, M.
, 2008, “Effects of Trace Elements at the Ni/ScYSZ Interface in a Model Solid Oxide Fuel Cell Anode
,” Solid State Ionics
, 179
, pp. 1436
–1441
. 57.
Huang
, Q.-A.
, Hui
, R.
, Wang
, B.
, and Zhang
, J.
, 2007, “A Review of AC Impedance Modeling and Validation in SOFC Diagnosis
,” Electrochim. Acta
, 52
, pp. 8144
–8164
. 58.
Cho
, P.-S.
, Cho
, Y. H.
, Park
, S.-Y.
, Lee
, S. B.
, Kim
, D.-Y.
, Park
, H.-M.
, Auchterlonie
, G.
, Drennan
, J.
, and Lee
, J.-H.
, 2009, “Grain-Boundary Conduction in Gadolinia-Doped Ceria: The Effect of SrO Addition
,” J. Electrochem. Soc.
, 156
(3
), pp. B339
–B344
. 59.
Badwal
, S. P. S.
, 1984, “Electrical Conductivity of Single Crystal and PolyCrystalline Yttria-Stabilized Zirconia
,” J. Mater. Sci.
, 19
(6
), pp. 1767
–1776
. 60.
Badwal
, S. P. S.
, 1995, “Grain Boundary Resistivity in Zirconia-Based Materials: Effect of Sintering Temperatures and Impurities
,” Solid State Ionics
, 76
, pp. 67
–80
. 61.
Kovalevsky
, A. V.
, Marques
, F. M. B.
, Kharton
, V. V.
, Maxim
, F.
, and Frade
, J. R.
, 2006, “Silica-Scavenging Effect in Zirconia Electrolytes: Assessment of Lanthanum Silicate Formation
,” Ionics
, 12
, pp. 79
–184
. 62.
Mori
, M.
, Abe
, T.
, Itoh
, H.
, Yamamoto
, O.
, Takeda
, Y.
, and Kawahara
, T.
, 1994, “Cubic-Stabilized Zirconia and Alumina Composites as Electrolytes in Planar Type Solid Oxide Fuel Cells
,” Solid State Ionics
, 74
(3–4
), pp. 157
–164
. 63.
Mori
, M.
, Yosikawa
, M.
Itoh
, H.
, and Abe
, T.
, 1994, “Effect of Alumina on Sintering Behavior and Electrical Conductivity of High-Purity Yttria-Stabilized Zirconia
,” J. Am. Ceram. Soc.
, 77
(8
), pp. 2217
–2219
. 64.
Zhang
, T. S.
, Ma
, J.
, Chen
, Y. Z. L.
, Luo
, H.
, Kong
, L. B.
, and Chan
, S. H.
, 2006, “Different Conduction Behaviors of Grain Boundaries in SiO2-Containing 8YSZ and CGO20 Electrolytes
,” Solid State Ionics
, 177
, pp. 1227
–1235
. 65.
Hughes
, A. E.
, and Badwal
, S. P. S.
, 1990, “Impurity Segregation Study at the Surface of Yttria-Zirconia Electrolytes by XPS
,” Solid State Ionics
, 40/41
, pp. 312
–315
. 66.
Liu
, Y. L.
, Primdahl
, S.
, and Mogensen
, M.
, 2003, “Effects of Impurities on Microstructure in Ni/YSZ-YSZ Half-Cells for SOFC
,” Solid State Ionics
, 161
, pp. 1
–10
. 67.
Verkerk
, M. J.
, Middelhuis
, B. J.
, and Burggraaf
, A. J.
, 1982, “Effect of Grain Boundaries on the Conductivity of High-Purity ZrO2–Y2O3 Ceramics
,” Solid State Ionics
, 6
, pp. 159
–170
. 68.
Tekeli
, S.
, Erdogan
, M.
, and Aktas
, B.
, 2004, “Microstructural Evolution in 8 mol% Y2O3-Stabilized Cubic Zirconia (8YSCZ) With SiO2 Addition
,” Mater. Sci. Eng.
, A386
, pp. 1
–9
. 69.
Tekeli
, S.
, Boyacioğlu
, T.
, and Güral
, A.
, 2008, “The Effect of Silica Doping on the Microstructure and Mechanical Properties of c-ZrO2/SiO2 Composites
,” Ceram. Int.
, 34
, pp. 1959
–1964
. 70.
Tekeli
, S.
, and Gürü
, M
., 2007, “Indentation Fracture Toughness and Hardness of Solid Oxide Fuel Cell Electrolyte Material
,” Key Eng. Mater.
, 336–338
, pp. 2418
–2421
. 71.
Tekeli
, S.
and Gürü
, M.
, 2008, “Microstructural Design and High Temperature Tensile Deformation Behavior of 8 mol% Yttria Stabilized Cubic Zirconia (8YCSZ) With SiO2 Additions
,” Ceram. Int.
, 34
, pp. 137
–140
. 72.
Sharif
, A. A.
, and Mecartney
, M. L.
, 2003, “Superplasticity in Cubic Yttria-Stabilized Zirconia With Intergranular Silica
,” Acta Mater.
, 51
, pp. 1633
–1639
. 73.
Liu
, Y. L.
, and Jiao
, C.
, 2005, “Microstructure Degradation of an Anode/Electrolyte Interface in SOFC Studied by Transmission Electron Microscopy
,” Solid State Ionics
, 176
, pp. 435
–442
. 74.
Ray
, E. R.
, and Maskalick
, N. J.
, 1993, “Contaminant Effects in Solid Oxide Fuel Cells
,” Technical Report DOE/MC/26355-94/C0254, Westinghouse Electric Corporation. 75.
Singh
, P.
, and Vora
, S. D.
, 2005, “Vapor Phase Silica Transport During SOFC Operation at 1000°C
,” Ceramic Engineering and Science Proceedings
, N. P.
Bansal
, eds., Wiley
, Vol. 4
, pp. 99
–110
. 76.
Jacobson
, N. S.
, Myers
, D. L.
, Opila
, E. J.
, and Copland
, E. H.
, 2005, “Interactions of Water Vapor With Oxide at Elevated Temperatures
,” J. Phys. Chem. Solids
, 66
, pp. 471
–478
. 77.
Jacobson
, N. S.
, Opila
, E. J.
, Myers
, D. L.
, and Copland
, E. H.
, 2005, “Thermodynamics of Gas Phase Species in the Si-O-H System
,” J. Chem. Thermodyn.
, 37
, pp. 1130
–1137
. 78.
Fergus
, J. W.
, 2005, “Sealants for Solid Oxide Fuel Cells
,” J. Power Sources
, 147
, pp. 46
–57
. 79.
Singh
, R. N.
, 2006, “High-temperature Seals for Solid Oxide Fuel Cells (SOFC)
,” J. Mater. Eng. Perform.
, 15
, pp. 422
–426
. 80.
Lessing
, P. A.
, 2007, “A Review of Sealing Technologies Applicable to Solid Oxide Electrolysis Cells
,” J. Mater. Sci.
, 42
, pp. 3465
–3476
. 81.
Zhu
, Q.
, Peng
, L.
, and Zhang
, T.
, 2007, “Stable Glass Seals for Intermediate Temperature (IT) SOFC Applications,” Fuel Cell Electronics Packaging
, K.
Kuang
, ed., Springer
, New York
, pp. 33
–60
. 82.
Hauch
, A.
, Jensen
, S. H.
, Bilde-Sørensen
, J. B.
, and Mogensen
, M.
, 2007, “Silica Segregation in the Ni/YSZ Electrode
,” J. Electrochem. Soc.
, 154
(7
), pp. A619
–A626
. 83.
de Ridder
, M.
, Vervoot
, A. G. J.
, van Welzenis
, R. G.
, and Brongersma
, H. H.
, 2003, “The Limiting Factor for Oxygen Exchange at the Surface of Fuel Cell Electrolytes
,” Solid State Ionics
, 156
, pp. 255
–262
. 84.
Zhang
, T. S.
, Ma
, J.
, Kong
, B. L.
, Hing
, P.
, Leng
, Y. J.
, Chan
, S. H.
, and Kilner
, J. A.
, 2003, “Sinterability and Ionic Conductivity of Coprecipitated Ce0.8Gd0.2O2−δ Powders Treated via a High-Energy Ball-Milling Process
,” J. Power Sources
, 124
, pp. 26
–33
. 85.
Zhang
, T. S.
, Ma
, J.
, Leng
, Y. J.
, Chan
, S. H.
, Hing
, P.
, and Kilner
, J. A.
, 2004, “Effect of Transition Metal Oxides on Densification and Electrical Properties of Si-Containing Ce0.8Gd0.2O2-δ Ceramics
,” Solid State Ionics
, 168
, pp. 187
–195
. 86.
Murai
, T.
, Yashiro
, K.
, Kaimai
, A.
, Otake
, T.
, Matsumoto
, H.
, Kawada
, T.
, and Mizusaki
, J.
, 2005, “Application of FT-IR for in Situ Investigation of High Temperature Electrode Reactions
,” Solid State Ionics
, 176
, pp. 2399
–2403
. 87.
Viitanen
, M. M.
, van Welzenis
, R. G.
, Brongersma
, H. H.
, and Berkel
, F. P. F. van
, 2002, “Silica Poisoning of Oxygen Membranes
,” Solid State Ionics
, 150
, pp. 223
–228
. 88.
Wheeldon
, I.
, Caners
, C.
, Karan
, K.
, and Peppley
, B.
, 2007, “Utilization of Biogas Generated From Ontario Wastewater Treatment Plants in Solid Oxide Fuel Cell Systems: A Process Modeling Study
,” Int. J. Green Energy
, 4
, pp. 221
–231
. 89.
Haga
, K.
, Adachi
, S.
, Shiratori
, Y.
, Itoh
, K.
, and Sasaki
, K.
, 2008, “Poisoning of SOFC Anodes by Various Fuel Impurities
,” Solid State Ionics
, 179
, pp. 1427
–1431
. 90.
Primdahl
S.
, and Mogensen
, M.
, 2000, “Durability and Thermal Cycling of Ni/YSZ Cermet Anodes for Solid Oxide Fuel Cells
,” J. Appl. Electrochem.
30
, pp. 247
–257
. 91.
Kuîsîcer
, D.
, Holc
, J.
, Hrovat
, M.
, Bernik
, S.
, Samardîzija
, Z.
, and Kolar
, D.
, 1995, “Interactions Between a Think Film LaMnO3 Cathode and YSZ SOFC Electrolyte During High Temperature Ageing
,” Solid State Ionics
, 78
, pp. 79
–85
. 92.
Lee
, J.-H.
, Kim
, D.-K.
, and Kim
, D.-Y.
, 2008, “Milicontact Impedance Spectroscopic Analysis in Stabilized Zirconia and Gadolinia-Doped Ceria
,” Solid State Ionics
, 179
, pp. 966
–970
. 93.
Guo
, X.
, and Yuan
, R.-Z.
, 1995, “Roles of Alumina in Zirconia-Based Solid Electrolyte
,” J. Mater. Sci.
, 30
, pp. 923
–931
. 94.
Guo
, X.
, Tang
, C.-Q.
, and Yuan
, R.-Z.
, 1995, “Grain Boundary Ionic Conduction in Zirconia-Based Solid Electrolyte With Alumina Addition
,” J. Eur. Ceram. Soc.
, 15
, pp. 25
–32
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