Study of LnBaCo2O6-δ (Ln = Pr, Nd, Sm and Gd) double perovskites as new cathode material for IT-SOFC

被引：49

作者：

Chavez, E. ^{[1
]}

Mueller, M. ^{[1
]}

Mogni, L. ^{[1
]}

Caneiro, A. ^{[1
]}

机构：

[1] Ctr Atom Bariloche CNEA, Inst Balseiro, RA-8400 San Carlos De Bariloche, Argentina

来源：

XIX LATIN AMERICAN SYMPOSIUM ON SOLID STATE PHYSICS (SLAFES) | 2009年 / 167卷

关键词：

GDBACO2O5+X LAYERED PEROVSKITE; SOLID OXIDE FUEL; ELECTRICAL-PROPERTIES; PHASE-TRANSITION; HIGH-TEMPERATURE; OXYGEN; PRBACO2O5+DELTA; DIFFUSION;

D O I：

10.1088/1742-6596/167/1/012043

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Oxides with double perovskites structures of general composition LnBaCo(2)O(6-delta) (Ln = Pr, Nd, Sm and Gd) were synthesized by solid state reaction with the purpose to evaluate new materials to be used as cathodes in intermediate temperature solid oxide fuel cell (IT-SOFC). A preliminary study about electrochemical properties was performed by impedance spectroscopy between 500 and 800 degrees C under atmosphere of pure O-2. Symmetrical cells were obtained by spray deposition of LnBaCo(2)O(6-delta) (Ln = Pr, Nd, Sm and Gd) at both sides of a dense ceramic electrolyte. The impedance spectroscopy measurements as a function of temperatures show a hysteresis loop which could be associated to a tetragonal/orthorhombic phase transition. The existence of this transition was corroborated by high temperature X-Ray diffraction and Differential Scanning Calorimetry measurements.

引用

页数：6

共 17 条

[1] Electrical properties of GdBaCo2O5+x for ITSOFC applications [J].

Chang, Aimin ;

Skinner, Stephen J. ;

Kilner, John A. .

SOLID STATE IONICS, 2006, 177 (19-25) :2009-2011

[2] Selective spin-state switch and metal-insulator transition in GdBaCo2O5.5 -: art. no. 180405 [J].

Frontera, C ;

García-Muñoz, JL ;

Llobet, A ;

Aranda, MAG .

PHYSICAL REVIEW B, 2002, 65 (18) :1-4

[3] Tailoring oxygen content on PrBaCo2O5+δ layered cobaltites [J].

Frontera, C ;

Caneiro, A ;

Carrillo, AE ;

Oró-Solé, J ;

García-Muñoz, JL .

CHEMISTRY OF MATERIALS, 2005, 17 (22) :5439-5445

[4] Rapid oxygen ion diffusion and surface exchange kinetics in PrBaCo2O5+x with a perovskite related structure and ordered A cations [J].

Kim, G. ;

Wang, S. ;

Jacobson, A. J. ;

Reimus, L. ;

Brodersen, P. ;

Mims, C. A. .

JOURNAL OF MATERIALS CHEMISTRY, 2007, 17 (24) :2500-2505

[5] Thermoelectric power of HoBaCo2O5.5:: Possible evidence of the spin blockade in cobaltites -: art. no. 026401 [J].

Maignan, A ;

Caignaert, V ;

Raveau, B ;

Khomskii, D ;

Sawatzky, G .

PHYSICAL REVIEW LETTERS, 2004, 93 (02) :026401-1

[6] Structural and magnetic studies of ordered oxygen-deficient perovskites LnBaCo2O5+δ, closely related to the "112" structure [J].

Maignan, A ;

Martin, C ;

Pelloquin, D ;

Nguyen, N ;

Raveau, B .

JOURNAL OF SOLID STATE CHEMISTRY, 1999, 142 (02) :247-260

[7] Magnetoresistance in the oxygen deficient LnBaCo(2)O(5.4) (Ln=Eu, Gd) phases [J].

Martin, C ;

Maignan, A ;

Pelloquin, D ;

Nguyen, N ;

Raveau, B .

APPLIED PHYSICS LETTERS, 1997, 71 (10) :1421-1423

[8] High-temperature order-disorder transition and polaronic conductivity in PrBaCo2O5.48 [J].

Streule, S ;

Podlesnyak, A ;

Sheptyakov, D ;

Pomjakushina, E ;

Stingaciu, M ;

Conder, K ;

Medarde, M ;

Patrakeev, MV ;

Leonidov, IA ;

Kozhevnikov, VL ;

Mesot, J .

PHYSICAL REVIEW B, 2006, 73 (09)

[9] Oxygen order-disorder phase transition in PrBaCo2O5.48 at high temperature [J].

Streule, S ;

Podlesnyak, A ;

Pomjakushina, E ;

Conder, K ;

Sheptyakov, D ;

Medarde, M ;

Mesot, J .

PHYSICA B-CONDENSED MATTER, 2006, 378-80 :539-540

[10] Effect of oxygen ordering on the structural and magnetic properties of the layered perovskites PrBaCo2O5+δ [J].

Streule, S ;

Podlesnyak, A ;

Mesot, J ;

Medarde, M ;

Conder, K ;

Pomjakushina, E ;

Mitberg, E ;

Kozhevnikov, V .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (21) :3317-3324

← 1 2 →