Materials for Symmetrical Solid Oxide Fuel Cells

J. C. Ruiz-Morales; J. Canales-Vazquez; C. Savaniu; J. T. S. Irvine; P. Nunez

doi:10.1149/1.2729183

Materials for Symmetrical Solid Oxide Fuel Cells

J. C. Ruiz-Morales^*, J. Canales-Vazquez, C. Savaniu, J. T. S. Irvine, P. Nunez

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A new concept of solid oxide fuel cell (SOFC), Symmetrical SOFC (SFC), has been investigated. In this new configuration, the same electrode material is used simultaneously as anode and cathode. Interconnector materials, such as chromites, could be potential symmetrical electrodes, at least, under pure hydrogen at relatively high temperatures. However, their lack of catalytic activity towards hydrocarbon oxidation led to the use of substituted-chromites to enhance the aforementioned catalytic activity. La(0.75)Sr(0.25)Cr(0.5)Mn(0.5)O(3-delta) (LSCM) is a good option for such symmetrical configuration, rendering fuel cell performances in excess of 500 and 300 mW/cm(2) using pure H(2) and CH(4) as fuel, at 950 degrees C. Other potential materials could be typical n-type anode materials, such as strontium titanates, that could be activated for oxidizing conditions by substituting some of Ti content for Fe to introduce p-type conductivity. Preliminary electrochemical experiments on La(4)Sr(8)Ti(12-x)Fe(x)O(38-delta)-based SFCs show that they perform reasonably well under humidified H(2).

Original language	English
Title of host publication	SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2
Editors	K Eguchi, SC Singhai, H Yokokawa, H Mizusaki
Place of Publication	PENNINGTON
Publisher	ELECTROCHEMICAL SOCIETY INC
Pages	905-912
Number of pages	8
ISBN (Print)	978-1-56677-554-0
DOIs	https://doi.org/10.1149/1.2729183
Publication status	Published - 2007
Event	10th International Symposium on Solid Oxide Fuel Cells - Nara, Japan Duration: 3 Jun 2007 → 8 Jun 2007

Publication series

Name	ECS Transactions
Publisher	ELECTROCHEMICAL SOCIETY INC
Volume	7
ISSN (Print)	1938-5862

Conference

Conference	10th International Symposium on Solid Oxide Fuel Cells
Country/Territory	Japan
City	Nara
Period	3/06/07 → 8/06/07

Keywords

EXTENDED DEFECTS
ANODE
METHANE
CONDUCTIVITY
PEROVSKITES
OXIDATION
SOFCS

Access to Document

10.1149/1.2729183

Cite this

@inproceedings{30d45315b60f48c5b39f0f52ceba5077,

title = "Materials for Symmetrical Solid Oxide Fuel Cells",

abstract = "A new concept of solid oxide fuel cell (SOFC), Symmetrical SOFC (SFC), has been investigated. In this new configuration, the same electrode material is used simultaneously as anode and cathode. Interconnector materials, such as chromites, could be potential symmetrical electrodes, at least, under pure hydrogen at relatively high temperatures. However, their lack of catalytic activity towards hydrocarbon oxidation led to the use of substituted-chromites to enhance the aforementioned catalytic activity. La(0.75)Sr(0.25)Cr(0.5)Mn(0.5)O(3-delta) (LSCM) is a good option for such symmetrical configuration, rendering fuel cell performances in excess of 500 and 300 mW/cm(2) using pure H(2) and CH(4) as fuel, at 950 degrees C. Other potential materials could be typical n-type anode materials, such as strontium titanates, that could be activated for oxidizing conditions by substituting some of Ti content for Fe to introduce p-type conductivity. Preliminary electrochemical experiments on La(4)Sr(8)Ti(12-x)Fe(x)O(38-delta)-based SFCs show that they perform reasonably well under humidified H(2).",

keywords = "EXTENDED DEFECTS, ANODE, METHANE, CONDUCTIVITY, PEROVSKITES, OXIDATION, SOFCS",

author = "Ruiz-Morales, {J. C.} and J. Canales-Vazquez and C. Savaniu and Irvine, {J. T. S.} and P. Nunez",

year = "2007",

doi = "10.1149/1.2729183",

language = "English",

isbn = "978-1-56677-554-0",

series = "ECS Transactions",

publisher = "ELECTROCHEMICAL SOCIETY INC",

pages = "905--912",

editor = "K Eguchi and SC Singhai and H Yokokawa and H Mizusaki",

booktitle = "SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2",

note = "10th International Symposium on Solid Oxide Fuel Cells ; Conference date: 03-06-2007 Through 08-06-2007",

}

Ruiz-Morales, JC, Canales-Vazquez, J, Savaniu, C, Irvine, JTS & Nunez, P 2007, Materials for Symmetrical Solid Oxide Fuel Cells. in K Eguchi, SC Singhai, H Yokokawa & H Mizusaki (eds), SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2. ECS Transactions, vol. 7, ELECTROCHEMICAL SOCIETY INC, PENNINGTON, pp. 905-912, 10th International Symposium on Solid Oxide Fuel Cells, Nara, Japan, 3/06/07. https://doi.org/10.1149/1.2729183

Materials for Symmetrical Solid Oxide Fuel Cells. / Ruiz-Morales, J. C.; Canales-Vazquez, J.; Savaniu, C. et al.
SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2. ed. / K Eguchi; SC Singhai; H Yokokawa; H Mizusaki. PENNINGTON: ELECTROCHEMICAL SOCIETY INC, 2007. p. 905-912 (ECS Transactions; Vol. 7).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Materials for Symmetrical Solid Oxide Fuel Cells

AU - Ruiz-Morales, J. C.

AU - Canales-Vazquez, J.

AU - Savaniu, C.

AU - Irvine, J. T. S.

AU - Nunez, P.

PY - 2007

Y1 - 2007

N2 - A new concept of solid oxide fuel cell (SOFC), Symmetrical SOFC (SFC), has been investigated. In this new configuration, the same electrode material is used simultaneously as anode and cathode. Interconnector materials, such as chromites, could be potential symmetrical electrodes, at least, under pure hydrogen at relatively high temperatures. However, their lack of catalytic activity towards hydrocarbon oxidation led to the use of substituted-chromites to enhance the aforementioned catalytic activity. La(0.75)Sr(0.25)Cr(0.5)Mn(0.5)O(3-delta) (LSCM) is a good option for such symmetrical configuration, rendering fuel cell performances in excess of 500 and 300 mW/cm(2) using pure H(2) and CH(4) as fuel, at 950 degrees C. Other potential materials could be typical n-type anode materials, such as strontium titanates, that could be activated for oxidizing conditions by substituting some of Ti content for Fe to introduce p-type conductivity. Preliminary electrochemical experiments on La(4)Sr(8)Ti(12-x)Fe(x)O(38-delta)-based SFCs show that they perform reasonably well under humidified H(2).

AB - A new concept of solid oxide fuel cell (SOFC), Symmetrical SOFC (SFC), has been investigated. In this new configuration, the same electrode material is used simultaneously as anode and cathode. Interconnector materials, such as chromites, could be potential symmetrical electrodes, at least, under pure hydrogen at relatively high temperatures. However, their lack of catalytic activity towards hydrocarbon oxidation led to the use of substituted-chromites to enhance the aforementioned catalytic activity. La(0.75)Sr(0.25)Cr(0.5)Mn(0.5)O(3-delta) (LSCM) is a good option for such symmetrical configuration, rendering fuel cell performances in excess of 500 and 300 mW/cm(2) using pure H(2) and CH(4) as fuel, at 950 degrees C. Other potential materials could be typical n-type anode materials, such as strontium titanates, that could be activated for oxidizing conditions by substituting some of Ti content for Fe to introduce p-type conductivity. Preliminary electrochemical experiments on La(4)Sr(8)Ti(12-x)Fe(x)O(38-delta)-based SFCs show that they perform reasonably well under humidified H(2).

KW - EXTENDED DEFECTS

KW - ANODE

KW - METHANE

KW - CONDUCTIVITY

KW - PEROVSKITES

KW - OXIDATION

KW - SOFCS

U2 - 10.1149/1.2729183

DO - 10.1149/1.2729183

M3 - Conference contribution

SN - 978-1-56677-554-0

T3 - ECS Transactions

SP - 905

EP - 912

BT - SOLID OXIDE FUEL CELLS 10 (SOFC-X), PTS 1 AND 2

A2 - Eguchi, K

A2 - Singhai, SC

A2 - Yokokawa, H

A2 - Mizusaki, H

PB - ELECTROCHEMICAL SOCIETY INC

CY - PENNINGTON

T2 - 10th International Symposium on Solid Oxide Fuel Cells

Y2 - 3 June 2007 through 8 June 2007

ER -

Materials for Symmetrical Solid Oxide Fuel Cells

Abstract

Publication series

Conference

Keywords

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