Nanocrystalline Sm0.5Sr0.5CoO3-δ synthesized using a chelating route for use in IT-SOFC cathodes: Microstructure, surface chemistry and electrical conductivity

被引：24

作者：

Scurtu, Rares ^{[1
,2
]}

Somacescu, Simona ^{[1
]}

Calderon-Moreno, Jose Maria ^{[1
]}

Culita, Daniela ^{[1
]}

Bulimestru, Ion ^{[3
]}

Popa, Nelea ^{[3
]}

Gulea, Aurelian ^{[3
]}

Osiceanu, Petre ^{[1
]}

机构：

[1] Romanian Acad, IlieMurgulescu Inst Phys Chem, Bucharest 060021, Romania

[2] Romania Natl Inst Res & Dev Microtechnol IMT, Bucharest 023573, Romania

[3] State Univ Moldova, Fac Chem & Chem Technol, Kishinev 2009, MD, Moldova

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2014年 / 210卷 / 01期

关键词：

Cathode; Perovkites; Electrical conductivity; XPS; IT-SOFC; COMPOSITE CATHODES;

D O I：

10.1016/j.jssc.2013.10.044

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Nanocrystalline Sm0.5Sr0.5CoO3_delta powders were synthesized by a chelating route using different polyfunctional H(x)APC acids (APC= aminopolycarboxylate; x=3, 4, 5). Different homologous aminopolycarboxylic acids, namely nitrilotriacetic (H(3)nta), ethylenediaminetetraacetic (H(4)edta), 1,2-cyclohexane-diaminetetracetic (H(4)cdta) and diethylenetriaminepentaacetic (H(5)dtpa) acid, were used as chelating agents to combine Sm, Sr, Co elements into a perovskite structure. The effects of the chelating agents on the crystalline structure, porosity, surface chemistry and electrical properties were investigated. The electrical properties of the perovskite-type materials emphasized that their conductivities in the temperature range of interest (600-800 degrees C) depend on the nature of the precursors as well as on the presence of a residual Co oxide phase as shown by XRD and XPS analysis. The surface chemistry and the surface stoichiometries were determined by XPS revealing a complex chemical behavior of Sr that exhibits a peculiar "surface phase" and "bulk phase" chemistry within the detected volume ( < 10 nm). (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：53 / 59

页数：7

共 24 条

[1] Insight into cation disorder of Li2Fe0.5Mn0.5SiO4 [J].

Bini, Marcella ;

Ferrari, Stefania ;

Capsoni, Doretta ;

Spreafico, Clelia ;

Tealdi, Cristina ;

Mustarelli, Piercarlo .

JOURNAL OF SOLID STATE CHEMISTRY, 2013, 200 :70-75

[2]

Brandon N.P., 2005, FUEL CELLS COMPENDIU

[3] SmBa0.5Sr0.5Cu2O5+δ and SmBa0.5Sr0.5CuFeO5+δ layered perovskite oxides as cathodes for IT-SOFCs [J].

Ding, Xifeng ;

Kong, Xin ;

Wu, Haina ;

Zhu, Yihua ;

Tang, Jianming ;

Thong, Yujie .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2012, 37 (03) :2546-2551

[4] Manufacture of a non-stoichiometric LSM cathode SOFC material by aqueous tape casting [J].

Gomez, Laura ;

Teresa Colomer, Maria ;

Escobar, Jairo ;

Moreno, Rodrigo .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2013, 33 (06) :1137-1143

[5] PrNi0.6Co0.4O3-Ce0.8Sm0.2O1.9 composite cathodes for intermediate temperature solid oxide fuel cells [J].

Huang, Shouguo ;

Lu, Qiliang ;

Feng, Shuangjiu ;

Li, Guang ;

Wang, Chunchang .

JOURNAL OF POWER SOURCES, 2012, 199 :150-154

[6] Conductivity and electrochemical performance of (Ba0.5Sr0.5)0.8La0.2Fe1-xMnxO3-δ cathode prepared by the citrate-EDTA complexing method [J].

Hung, I-Ming ;

Ciou, Chun-Jing ;

Zeng, Yi-Jia ;

Wu, Jun-Sheng ;

Lee, Yu-Chen ;

Su, Ay ;

Chan, Shih-Hung .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2011, 31 (16) :3095-3101

[7]

Johnson D., 2010, ZVIEW

[8] Electrochemical characterization of gradient Sm0.5Sr0.5CoO3-δ cathodes on Ce0.8Sm0.2O1.9 electrolytes for solid oxide fuel cells [J].

Li, Chien-Hung ;

Hu, Shao-Hua ;

Tay, Kok-Wan ;

Fu, Yen-Pei .

CERAMICS INTERNATIONAL, 2012, 38 (02) :1557-1562

[9] Compaction pressure effect on microstructure and electrochemical performance of GdBaCo2O5+δ cathode for IT-SOFCs [J].

Li, Na ;

Lu, Zhe ;

Wei, Bo ;

Huang, Xiqiang ;

Zhang, Yaohui ;

Su, Wenhui .

CERAMICS INTERNATIONAL, 2012, 38 (03) :2159-2164

[10] Electrochemical investigation of oxygen reduction reaction on La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes deposited by Electrostatic Spray Deposition [J].

Marinha, Daniel ;

Dessemond, Laurent ;

Djurado, Elisabeth .

JOURNAL OF POWER SOURCES, 2012, 197 :80-87

← 1 2 3 →