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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Influence of the indium concentration on microstructural and electrical properties of proton conducting NiO-BaCe0.9-xInxY0.1O3-delta cermet anodes for IT-SOFC application

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Autor(es):
Zunic, Milan [1, 2] ; Brankovic, Goran [1] ; Foschini, Cesar Renato [2] ; Cilense, Mario [2] ; Longo, Elson [2] ; Varela, Jose Arana [2]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Belgrade, Inst Multidisciplinary Res, Belgrade 11000 - Serbia
[2] CMDMC, Inst Quim, UNESP LIEC, BR-14800900 Araraquara, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Journal of Alloys and Compounds; v. 563, p. 254-260, JUN 25 2013.
Citações Web of Science: 6
Resumo

Optimization of the major properties of anodes based on proton conductors, such as microstructure, conductivity and chemical stability, is yet to be achieved. In this study we investigated the influence of indium on the chemical stability, microstructural and electrical characteristics of proton conducting NiO-BaCe0.9 xInxY0.1O3 delta (NiO-BCIYx) anodes. Four compositions of cermet anode substrates NiO-BCIYx were prepared using the method of evaporation and decomposition of solutions and suspensions (EDSS). Sintered anode substrates were reduced and their microstructural and electrical properties were examined before and after reduction as a function of the amount of indium. Anode substrates tested on chemical stability in the CO2 atmosphere showed high stability compared to anode substrates based on commonly used doped barium cerates. Microstructural properties of the anode pellets before and after testing in CO2 were investigated using X-ray diffraction analysis. Impedance spectroscopy measurements were used for evaluation of electrical properties of the anode pellets and the conductivity values of reduced anodes of more than 14 S cm (1) at 600 degrees C confirmed percolations through Ni particles. Under fuel cell operating conditions, the cell with a Ni-BCIY20 anode achieved the highest performance, demonstrating a peak power density 223 mW/cm(2) at 700 degrees C confirming the functionality of Ni-BCIY anodes. (C) 2013 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 09/14713-3 - Aplicação da técnica de espectroscopia de impedância em dispositivos nanoestruturados para conversão de energia solar e biosensoriamento
Beneficiário:Márcio de Sousa Góes
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 10/20574-3 - Filmes de eletrólitos baseados em condutores de prótons em altas temperaturas para aplicação em IT-SOFCs
Beneficiário:Milan Zunic
Linha de fomento: Bolsas no Brasil - Pós-Doutorado