Title :

Study of la4bacu5-xmnxo13+delta materials as potential electrode for symmetrical-sofc

Author(s) :

Duran, Silvia [Auteur]
Rangel, Nathaly [Auteur]
Silva, Camila [Auteur]
Macias, Mario A. [Auteur]
Capoen, Edouard [Auteur]
Pirovano, Caroline [Auteur]
Niemczyk, Anna [Auteur]
Suescun, Leopoldo [Auteur]
Roussel, Pascal [Auteur]
Gauthier, Gilles H. [Auteur]

Journal title :

Solid State Ionics

Abbreviated title :

Solid State Ion.

Volume number :

341

Publication date :

2019-11-05

ISSN :

0167-2738

English keyword(s) :

Electrical conductivity
Cuprate
Electrode
Perovskite
SOFC
Manganite

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [en]

La4BaCu5-xMnxO13+δ materials have been synthesized by the sol-gel method in air and studied as possible electrode materials for symmetrical Solid Oxide Fuel Cells (S-SOFC). Within the series, La4BaMn5O13+δ (LBMn) exhibits ...
Show more >La4BaCu5-xMnxO13+δ materials have been synthesized by the sol-gel method in air and studied as possible electrode materials for symmetrical Solid Oxide Fuel Cells (S-SOFC). Within the series, La4BaMn5O13+δ (LBMn) exhibits an excellent stability in reducing atmosphere and remarkable redox stability, although a structure transition from rhombohedral to cubic perovskite structure is found beyond 500 °C in air or wet diluted hydrogen. The thermal expansion coefficients (TEC), deduced from HT-XRD study during redox cycling, make the manganite compatible with classical SOFC electrolytes at low temperature; however, relatively high values of 15.8(5) and 18.1(2) K−1 are found in cathode and anode conditions for T > 500 °C. With high electrical conductivities of 178 and 33.3 S cm−1, in air and hydrogen at 800 °C, we demonstrate that the La0.8Ba0.2MnO3±δ manganite fulfils all the preliminary requirements of an electrode material for symmetrical SOFC.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Matériaux inorganiques, structures, systèmes et propriétés (MISSP)

Submission date :

2022-03-02T07:14:10Z