Optimisation of the Solid Oxide Fuel Cell (SOFC) cathode material Ca3Co4O9-δ

Aurelie Charlene Rolle; Samir Boulfrad; Kensaku Nagasawa; Hiroshi Nakatsugawa; Olivier Mentre; John Thomas Sirr Irvine; Sylvie Daviero-Minaud

doi:10.1016/j.jpowsour.2011.02.030

Optimisation of the Solid Oxide Fuel Cell (SOFC) cathode material Ca₃Co₄O_9-δ

Aurelie Charlene Rolle, Samir Boulfrad, Kensaku Nagasawa, Hiroshi Nakatsugawa, Olivier Mentre, John Thomas Sirr Irvine, Sylvie Daviero-Minaud

Research output: Contribution to journal › Article › peer-review

Abstract

This paper focuses on the electrochemical potentialities of the 2D misfit compound Ca3Co4O9-delta, so far mainly investigated for its thermoelectric properties. Its expansion coefficient (TEC = (9-10) x 10(-6)degrees C-1) and its chemical stability are compatible with standard CGO IT-electrolyte and the first optimisation steps of the deposited cathode have been performed with the aim to minimise the ASR and increase the cell durability. Particular attention has been paid on the effect of thickness and microstructure for pure and composite cathodes. The electrode reaction was performed on symmetrical cells. The preliminary results presented here show that the composite (70 wt.% Ca3Co4O9-delta-30 wt.% CGO) gives the lowest ASR values compare to single-phased electrodes. Strikingly, the ASR values increase for thinner deposited layers. The effect of various current collectors (gold grid vs. platinum paste) has been also checked. (C) 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	7328-7332
Number of pages	5
Journal	Journal of Power Sources
Volume	196
Issue number	17
DOIs	https://doi.org/10.1016/j.jpowsour.2011.02.030
Publication status	Published - 1 Sept 2011
Event	European Solid Oxide Fuel Cell Forum 2010 - Lucerne, Switzerland Duration: 29 Jun 2010 → 2 Jul 2010

Keywords

Scanning electron microscopy
Solid oxide fuel cell
Ca3Co4O9-delta
ELECTRODES
Mixed ionic electronic conductor
THERMOELECTRIC PROPERTIES
Cathode
IMPEDANCE
Electrochemical impedance spectroscopy

Access to Document

10.1016/j.jpowsour.2011.02.030

Material for high Temp FCT EP/E064248/1: Materials for High Temperature Fuel Cell Technology
Irvine, J. T. S. (PI), Cassidy, M. (CoI), Connor, P. A. (CoI), Savaniu, C. D. (CoI) & Tao, S. (CoI)
EPSRC
1/01/08 → 31/12/12
Project: Standard
CarbonVision2 Fuel Cell Tec EP/E045421/1: Fuel Cell Technology, Enabling a Robust Clean Energy Economy
Irvine, J. T. S. (PI), Connor, P. A. (CoI) & Tao, S. (CoI)
EPSRC
1/04/07 → 31/03/12
Project: Standard

Cite this

@article{6025e71a6049436c995636defa31159a,

title = "Optimisation of the Solid Oxide Fuel Cell (SOFC) cathode material Ca3Co4O9-δ",

abstract = "This paper focuses on the electrochemical potentialities of the 2D misfit compound Ca3Co4O9-delta, so far mainly investigated for its thermoelectric properties. Its expansion coefficient (TEC = (9-10) x 10(-6)degrees C-1) and its chemical stability are compatible with standard CGO IT-electrolyte and the first optimisation steps of the deposited cathode have been performed with the aim to minimise the ASR and increase the cell durability. Particular attention has been paid on the effect of thickness and microstructure for pure and composite cathodes. The electrode reaction was performed on symmetrical cells. The preliminary results presented here show that the composite (70 wt.% Ca3Co4O9-delta-30 wt.% CGO) gives the lowest ASR values compare to single-phased electrodes. Strikingly, the ASR values increase for thinner deposited layers. The effect of various current collectors (gold grid vs. platinum paste) has been also checked. (C) 2011 Elsevier B.V. All rights reserved.",

keywords = "Scanning electron microscopy, Solid oxide fuel cell, Ca3Co4O9-delta, ELECTRODES, Mixed ionic electronic conductor, THERMOELECTRIC PROPERTIES, Cathode, IMPEDANCE, Electrochemical impedance spectroscopy",

author = "Rolle, {Aurelie Charlene} and Samir Boulfrad and Kensaku Nagasawa and Hiroshi Nakatsugawa and Olivier Mentre and Irvine, {John Thomas Sirr} and Sylvie Daviero-Minaud",

year = "2011",

month = sep,

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doi = "10.1016/j.jpowsour.2011.02.030",

language = "English",

volume = "196",

pages = "7328--7332",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier Science BV",

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note = " European Solid Oxide Fuel Cell Forum 2010, 9th European SOFC Forum ; Conference date: 29-06-2010 Through 02-07-2010",

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AU - Rolle, Aurelie Charlene

AU - Boulfrad, Samir

AU - Nagasawa, Kensaku

AU - Nakatsugawa, Hiroshi

AU - Mentre, Olivier

AU - Irvine, John Thomas Sirr

AU - Daviero-Minaud, Sylvie

PY - 2011/9/1

Y1 - 2011/9/1

N2 - This paper focuses on the electrochemical potentialities of the 2D misfit compound Ca3Co4O9-delta, so far mainly investigated for its thermoelectric properties. Its expansion coefficient (TEC = (9-10) x 10(-6)degrees C-1) and its chemical stability are compatible with standard CGO IT-electrolyte and the first optimisation steps of the deposited cathode have been performed with the aim to minimise the ASR and increase the cell durability. Particular attention has been paid on the effect of thickness and microstructure for pure and composite cathodes. The electrode reaction was performed on symmetrical cells. The preliminary results presented here show that the composite (70 wt.% Ca3Co4O9-delta-30 wt.% CGO) gives the lowest ASR values compare to single-phased electrodes. Strikingly, the ASR values increase for thinner deposited layers. The effect of various current collectors (gold grid vs. platinum paste) has been also checked. (C) 2011 Elsevier B.V. All rights reserved.

AB - This paper focuses on the electrochemical potentialities of the 2D misfit compound Ca3Co4O9-delta, so far mainly investigated for its thermoelectric properties. Its expansion coefficient (TEC = (9-10) x 10(-6)degrees C-1) and its chemical stability are compatible with standard CGO IT-electrolyte and the first optimisation steps of the deposited cathode have been performed with the aim to minimise the ASR and increase the cell durability. Particular attention has been paid on the effect of thickness and microstructure for pure and composite cathodes. The electrode reaction was performed on symmetrical cells. The preliminary results presented here show that the composite (70 wt.% Ca3Co4O9-delta-30 wt.% CGO) gives the lowest ASR values compare to single-phased electrodes. Strikingly, the ASR values increase for thinner deposited layers. The effect of various current collectors (gold grid vs. platinum paste) has been also checked. (C) 2011 Elsevier B.V. All rights reserved.

KW - Scanning electron microscopy

KW - Solid oxide fuel cell

KW - Ca3Co4O9-delta

KW - ELECTRODES

KW - Mixed ionic electronic conductor

KW - THERMOELECTRIC PROPERTIES

KW - Cathode

KW - IMPEDANCE

KW - Electrochemical impedance spectroscopy

U2 - 10.1016/j.jpowsour.2011.02.030

DO - 10.1016/j.jpowsour.2011.02.030

M3 - Article

SN - 0378-7753

VL - 196

SP - 7328

EP - 7332

JO - Journal of Power Sources

JF - Journal of Power Sources

IS - 17

T2 - European Solid Oxide Fuel Cell Forum 2010

Y2 - 29 June 2010 through 2 July 2010

ER -

Optimisation of the Solid Oxide Fuel Cell (SOFC) cathode material Ca3Co4O9-δ

Abstract

Keywords

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Projects

Material for high Temp FCT EP/E064248/1: Materials for High Temperature Fuel Cell Technology

CarbonVision2 Fuel Cell Tec EP/E045421/1: Fuel Cell Technology, Enabling a Robust Clean Energy Economy

Cite this

Optimisation of the Solid Oxide Fuel Cell (SOFC) cathode material Ca₃Co₄O_9-δ