SHI, Zhan; XIA, Tian; MENG, Fuchang; WANG, Jingping; LIAN, Jie; ZHAO, Hui; BASSAT, Jean-Marc.; GRENIER, Jean-Claude; MENG, Jian

doi:10.1002/fuce.201300273

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

SHI, Zhan
Key Laboratory of Functional Inorganic Material Chemistry [KLFIMC]

XIA, Tian
Key Laboratory of Functional Inorganic Material Chemistry [KLFIMC]

MENG, Fuchang
Key Laboratory of Functional Inorganic Material Chemistry [KLFIMC]

Langue

Article de revue

Ce document a été publié dans

Fuel Cells. 2014, vol. 14, n° 6, p. 979-990

Wiley-VCH Verlag

Résumé en anglais

A layered perovskite EuBaCo2O5+δ (EBCO) has been prepared by a solid-state reaction, and evaluated as potential cathode for intermediate-temperature solid oxide fuel cells. Structural characterizations are determined at room temperature using powder X-ray diffraction and transmission electron microscopy technique. The good fits to the XRD data by Rietveld refinement method are obtained in the orthorhombic space group (Pmmm). The lower average thermal expansion coefficient, 14.9 × 10–6 °C–1 between 100 and 800 °C, indicates its better thermal expansion compatibility with conventional electrolytes, compared with the other cobalt-containing cathode materials. The high electrical conductivity and large oxygen nonstoichiometry at intermediate temperatures suggest the effective charge transfer reactions including electron conduction and oxide-ion motion in cathode. As a result, a highly electrochemical activity towards the oxygen reduction reaction is achieved between 600 and 700 °C, as evidenced by low area-specific resistances, e.g. 0.14–0.5 Ω cm2. In addition, cathodic overpotential and oxygen reduction kinetics of the EBCO cathode have also been studied.< Réduire

Métadonnées

Licence d’utilisation du document

A layered Perovskite EuBaCo2O5+d for intermediate-temperature solid oxide fuel cell cathode

Langue

Ce document a été publié dans

Résumé en anglais

DOI

Origine

Unités de recherche