Misfit Ca-cobaltite from a mixture of mollusk shells and cobalt oxide as potential SOFC cathode material

Erik B. G. A. Fulgencio; Klivia P. V. Melo; Rinaldo M. Silva; Joao P. F. Grilo; Vincent Caignaert; Moises R. Cesario; Liszandra F. A. Campos; Daniel A. Macedo

Misfit Ca-cobaltite from a mixture of mollusk shells and cobalt oxide as potential SOFC cathode material

Erik B. G. A. Fulgencio ¹ Klivia P. V. Melo ¹ Rinaldo M. Silva ¹ Joao P. F. Grilo ² Vincent Caignaert Moises R. Cesario ³ Liszandra F. A. Campos ¹ Daniel A. Macedo ¹

1 UFPB - Universidade Federal da Paraiba

2 Universidade de Aveiro

3 CRISMAT - Laboratoire de cristallographie et sciences des matériaux

Abstract : Misfit Ca-cobaltites of nominal composition Ca3Co4O9-delta (C349) have attracted great attention as Solid Oxide Fuel Cell (SOFC) cathode material. The present work reports, for the first time, the solid-state synthesis of C349 powders from a mixture of cobalt oxide and mollusk shells, a natural source of calcium carbonate. The synthesized material was studied by X-ray diffraction, with Rietveld refinement of the XRD data, and Transmission Electron Microscopy (TEM). Screen-printed C349 porous electrodes were fired on both sides of dense gadolinia-doped ceria ceramics and electrochemically characterized by impedance spectroscopy at 700-800 C in air. The measured area specific resistance (ASR of 1.47 Omega cm(2) at 800 degrees C in air) is in line with literature data for similar cathodes prepared by other synthetic routes.

Keywords : Ca3CO4O9-delta Fuel cells Powders solid state reaction X-ray methods Impedance

Type de document :

Article dans une revue

Domaine :

Chimie

Chimie / Cristallographie

Chimie / Matériaux

Chimie / Chimie théorique et/ou physique

Liste complète des métadonnées

https://hal-normandie-univ.archives-ouvertes.fr/hal-02175425
Contributeur : Elisabeth van T Hof <>
Soumis le : vendredi 5 juillet 2019 - 17:01:31
Dernière modification le : mercredi 28 août 2019 - 15:08:04

Misfit Ca-cobaltite from a mixture of mollusk shells and cobalt oxide as potential SOFC cathode material

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Misfit Ca-cobaltite from a mixture of mollusk shells and cobalt oxide as potential SOFC cathode material

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