Chemical Degradation of the La0.6Sr0.4Co0.2Fe0.8O3-δ/Ce0.8Sm0.2O2-δ Interface during Sintering and Cell Operation

被引：5
作者：
Francois, Melanie [1 ]
Carpanese, Maria Paola [2 ,3 ]
Heintz, Olivier [1 ]
Lescure, Victoire [1 ]
Clematis, Davide [2 ,3 ]
Combemale, Lionel [1 ]
Demoisson, Frederic [1 ]
Caboche, Gilles [1 ]
机构：
[1] Univ Bourgogne Franche Comte, Lab Interdisciplinaire Carnot Bourgogne, FCLAB, CNRS,ICB,UMR6303, 9 Ave Savary,BP47870, F-21078 Dijon, France
[2] Univ Genoa, Dept Civil Chem & Environm Engn DICCA, Via Montallegro 1, I-16145 Genoa, Italy
[3] Inst Condensed Matter Chem & Technol Energy CNR I, Via Operia Pia 15, I-16145 Genoa, Italy
来源：
ENERGIES | 2021年 / 14卷 / 12期
关键词：
Sm-doped ceria; La0.6Sr0.4Co0.2Fe0.8O3-delta; cationic diffusion; interface; impedance spectroscopy; X-ray photoelectron spectroscopy; OXIDE FUEL-CELLS; OXYGEN REDUCTION REACTION; STRONTIUM COBALT FERRITE; SR SURFACE SEGREGATION; DOPED CERIA; ELECTRICAL-PROPERTIES; DIFFUSION BARRIER; THIN-FILMS; TEMPERATURE; CATHODES;
D O I：
10.3390/en14123674
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A complete cell consisting of NiO-Ce0.8Sm0.2O3-delta//Ce0.8Sm0.2O3-delta//(La0.6Sr0.4)(0.95)Co0.2Fe0.8O3-delta elaborated by a co-tape casting and co-sintering process and tested in operating fuel cell conditions exhibited a strong degradation in performance over time. Study of the cathode-electrolyte interface after cell testing showed, on one hand, the diffusion of lanthanum from (La0.6Sr0.4)(0.95)Co0.2Fe0.8O3-delta into Sm-doped ceria leading to a La- and Sm-doped ceria phase. On the other hand, Ce and Sm diffused into the perovskite phase of the cathode. The grain boundaries appear to be the preferred pathways of the cation diffusion. Furthermore, a strontium enrichment was clearly observed both in the (La0.6Sr0.4)(0.95)Co0.2Fe0.8O3-delta layer and at the interface with electrolyte. X-ray photoelectron spectroscopy (XPS) indicates that this Sr-rich phase corresponded to SrCO3. These different phenomena led to a chemical degradation of materials and interfaces, explaining the decrease in electrochemical performance.
引用
收藏
页数：15
相关论文
共 86 条
[1]   Gd/Sm dopant-modified oxidation state and defect generation in nano-ceria [J].
Acharya, S. A. ;
Gaikwad, V. M. ;
D'Souza, S. W. ;
Barman, S. R. .
SOLID STATE IONICS, 2014, 260 :21-29
[2]   A STUDY OF A NUMBER OF MIXED TRANSITION-METAL OXIDE SPINELS USING X-RAY PHOTOELECTRON-SPECTROSCOPY [J].
ALLEN, GC ;
HARRIS, SJ ;
JUTSON, JA ;
DYKE, JM .
APPLIED SURFACE SCIENCE, 1989, 37 (01) :111-134
[3]   Structural and ionic transport mechanism of rare earth doped cerium oxide nanomaterials: Effect of ionic radius of dopant cations [J].
Anirban, Sk. ;
Dutta, Abhigyan .
SOLID STATE IONICS, 2017, 309 :137-145
[4]   Preparation and characterization of Ce1-xSmxO2-δ (x=0.1-0.3) as electrolyte material for intermediate temperature SOFC [J].
Anjaneya, K. C. ;
Nayaka, G. P. ;
Manjanna, J. ;
Govindaraj, G. ;
Ganesha, K. N. .
SOLID STATE SCIENCES, 2013, 26 :89-96
[5]   Studies on structural, morphological and electrical properties of Ce0.8Ln0.2O2-δ (Ln = Y3+, Gd3+, Sm3+, Nd3+ and La3+) solid solutions prepared by citrate complexation method [J].
Anjaneya, K. C. ;
Nayaka, G. P. ;
Manjanna, J. ;
Govindaraj, G. ;
Ganesha, K. N. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 585 :594-601
[6]   Review of composite cathodes for intermediate-temperature solid oxide fuel cell applications [J].
Aziz, Azreen Junaida Abd ;
Baharuddin, Nurul Akidah ;
Somalu, Mahendra Rao ;
Muchtar, Andanastuti .
CERAMICS INTERNATIONAL, 2020, 46 (15) :23314-23325
[7]   AC-IMPEDANCE STUDIES OF RARE-EARTH-OXIDE DOPED CERIA [J].
BALAZS, GB ;
GLASS, RS .
SOLID STATE IONICS, 1995, 76 (1-2) :155-162
[8]   Study of the rate limiting step of the cathodic process in anode supported solid oxide fuel cell [J].
Carpanese, M. P. ;
Cerisola, G. ;
Viviani, M. ;
Piccardo, P. ;
Vladikova, D. ;
Stoynov, Z. ;
Barbucci, A. .
JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY, 2008, 5 (01)
[9]   A ceria layer as diffusion barrier between LAMOX and lanthanum strontium cobalt ferrite along with the impedance analysis [J].
Chang, Hun-Chieh ;
Tsai, Dah-Shyang ;
Chung, Wen-Hung ;
Huang, Ying-Sheng ;
Le, Minh-Vien .
SOLID STATE IONICS, 2009, 180 (4-5) :412-417
[10]   Nonstoichiometry in Oxide Thin Films Operating under Anodic Conditions: A Chemical Capacitance Study of the Praseodymium-Cerium Oxide System [J].
Chen, Di ;
Bishop, Sean R. ;
Tuller, Harry L. .
CHEMISTRY OF MATERIALS, 2014, 26 (22) :6622-6627
123456789