Oxide ion transport in promising cobaltites for SOC

Vincent Thoréton; Y. Hu; I. Kehal; X. Flandre; Da Huo; C. Pirovano; A. Rolle; E. Capoen; N. Nuns; A. S. Mamede; G. Dezanneau; R. N. Vannier

doi:10.1016/j.proeng.2014.12.497

Oxide ion transport in promising cobaltites for SOC

Vincent Thoréton, Y. Hu, I. Kehal, X. Flandre, Da Huo, C. Pirovano, A. Rolle, E. Capoen, N. Nuns, A. S. Mamede, G. Dezanneau, R. N. Vannier

Research output: Contribution to journal › Conference article › peer-review

Abstract

Two cobaltites were studied as air electrodes for Solid Oxide Cells with a Cerium Gadolinium Oxide electrolyte (CGO): Ca₃Co₄O_9+δ well known for its thermoelectric properties, and Ba₂Co₉O₁₄. After optimisation of composition and thickness, a very good ASR of only 0.08 Ωcm² was obtained for the 50 wt% Ba₂Co₉O₁₄ - 50 wt% 50CGO composite. In contrast, a value of 0.5 Ωcm² was reached for the 50 wt% Ca₃Co₄O_9+δ- 50 wt% CGO composite. Although, Ba₂Co₉O₁₄ sample contained 18O after annealing, oxide ion diffusion in this compound still has to be confirmed. In contrast, high surface exchange kinetics were measured for both Ca₃Co₄O_9+δ and NdBaCo₂O_5+δ, for which mainly calcium and barium/neodymium were evidenced at the uppermost surface of the samples, whose atoms may play a key role in the mechanism of oxygen molecules dissociation.

Original language	English
Pages (from-to)	115-120
Number of pages	6
Journal	Procedia Engineering
Volume	98
DOIs	https://doi.org/10.1016/j.proeng.2014.12.497
Publication status	Published - 1 Jan 2014
Externally published	Yes
Event	11th International Symposium on Systems with Fast Ionic Transport, ISSFIT 2014 - Gdansk-Sobieszewo, Poland Duration: 25 Jun 2014 → 29 Jun 2014

Keywords

Cobaltites
Oxide ion diffusion
SOFC cathode

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10.1016/j.proeng.2014.12.497

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@article{bfc6883cb93b4d9d9f8e05e7b08d7d59,

title = "Oxide ion transport in promising cobaltites for SOC",

abstract = "Two cobaltites were studied as air electrodes for Solid Oxide Cells with a Cerium Gadolinium Oxide electrolyte (CGO): Ca3Co4O9+δ well known for its thermoelectric properties, and Ba2Co9O14. After optimisation of composition and thickness, a very good ASR of only 0.08 Ωcm2 was obtained for the 50 wt\% Ba2Co9O14 - 50 wt\% 50CGO composite. In contrast, a value of 0.5 Ωcm2 was reached for the 50 wt\% Ca3Co4O9+δ- 50 wt\% CGO composite. Although, Ba2Co9O14 sample contained 18O after annealing, oxide ion diffusion in this compound still has to be confirmed. In contrast, high surface exchange kinetics were measured for both Ca3Co4O9+δ and NdBaCo2O5+δ, for which mainly calcium and barium/neodymium were evidenced at the uppermost surface of the samples, whose atoms may play a key role in the mechanism of oxygen molecules dissociation.",

keywords = "Cobaltites, Oxide ion diffusion, SOFC cathode",

author = "Vincent Thor{\'e}ton and Y. Hu and I. Kehal and X. Flandre and Da Huo and C. Pirovano and A. Rolle and E. Capoen and N. Nuns and Mamede, \{A. S.\} and G. Dezanneau and Vannier, \{R. N.\}",

note = "Publisher Copyright: {\textcopyright} 2014 The Authors. Published by Elsevier Ltd.; 11th International Symposium on Systems with Fast Ionic Transport, ISSFIT 2014 ; Conference date: 25-06-2014 Through 29-06-2014",

year = "2014",

month = jan,

day = "1",

doi = "10.1016/j.proeng.2014.12.497",

language = "English",

volume = "98",

pages = "115--120",

journal = "Procedia Engineering",

issn = "1877-7058",

}

TY - JOUR

T1 - Oxide ion transport in promising cobaltites for SOC

AU - Thoréton, Vincent

AU - Hu, Y.

AU - Kehal, I.

AU - Flandre, X.

AU - Huo, Da

AU - Pirovano, C.

AU - Rolle, A.

AU - Capoen, E.

AU - Nuns, N.

AU - Mamede, A. S.

AU - Dezanneau, G.

AU - Vannier, R. N.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Two cobaltites were studied as air electrodes for Solid Oxide Cells with a Cerium Gadolinium Oxide electrolyte (CGO): Ca3Co4O9+δ well known for its thermoelectric properties, and Ba2Co9O14. After optimisation of composition and thickness, a very good ASR of only 0.08 Ωcm2 was obtained for the 50 wt% Ba2Co9O14 - 50 wt% 50CGO composite. In contrast, a value of 0.5 Ωcm2 was reached for the 50 wt% Ca3Co4O9+δ- 50 wt% CGO composite. Although, Ba2Co9O14 sample contained 18O after annealing, oxide ion diffusion in this compound still has to be confirmed. In contrast, high surface exchange kinetics were measured for both Ca3Co4O9+δ and NdBaCo2O5+δ, for which mainly calcium and barium/neodymium were evidenced at the uppermost surface of the samples, whose atoms may play a key role in the mechanism of oxygen molecules dissociation.

AB - Two cobaltites were studied as air electrodes for Solid Oxide Cells with a Cerium Gadolinium Oxide electrolyte (CGO): Ca3Co4O9+δ well known for its thermoelectric properties, and Ba2Co9O14. After optimisation of composition and thickness, a very good ASR of only 0.08 Ωcm2 was obtained for the 50 wt% Ba2Co9O14 - 50 wt% 50CGO composite. In contrast, a value of 0.5 Ωcm2 was reached for the 50 wt% Ca3Co4O9+δ- 50 wt% CGO composite. Although, Ba2Co9O14 sample contained 18O after annealing, oxide ion diffusion in this compound still has to be confirmed. In contrast, high surface exchange kinetics were measured for both Ca3Co4O9+δ and NdBaCo2O5+δ, for which mainly calcium and barium/neodymium were evidenced at the uppermost surface of the samples, whose atoms may play a key role in the mechanism of oxygen molecules dissociation.

KW - Cobaltites

KW - Oxide ion diffusion

KW - SOFC cathode

U2 - 10.1016/j.proeng.2014.12.497

DO - 10.1016/j.proeng.2014.12.497

M3 - Conference article

AN - SCOPUS:84923369102

SN - 1877-7058

VL - 98

SP - 115

EP - 120

JO - Procedia Engineering

JF - Procedia Engineering

T2 - 11th International Symposium on Systems with Fast Ionic Transport, ISSFIT 2014

Y2 - 25 June 2014 through 29 June 2014

ER -

Oxide ion transport in promising cobaltites for SOC

Abstract

Keywords

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