A study of Pr0.7Sr0.3Fe1-xNi xO3-δ as a cathode material for SOFCs with intermediate operating temperature

Shin Ichi Hashimoto; Kent Kammer; Peter Halvor Larsen; Finn Willy Poulsen; Mogens Mogensen

doi:10.1016/j.ssi.2004.09.010

A study of Pr_0.7Sr_0.3Fe_1-xNi _xO_3-δ as a cathode material for SOFCs with intermediate operating temperature

Shin Ichi Hashimoto, Kent Kammer, Peter Halvor Larsen, Finn Willy Poulsen, Mogens Mogensen

ENV - Environmental Studies for Advanced Society

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

51 Citations (Scopus)

Abstract

Pr_0.7Sr_0.3Fe_1-xNi_xO _3-δ(PSFN; x=0.2-0.5) compounds were synthesized and characterized by powder X-ray diffraction (XRD), thermal expansion coefficient (TEC) measurements, electrical conductivity and electrochemical impedance spectroscopy on cone-shaped electrodes on a Ce_0.9Gd _0.1O_1.95 (CGO10) electrolyte. The main phase of the powders belongs to the orthorhombic crystal system. The conductivities are fairly high, e.g., around 450 Scm^-1 at 600 °C for the x=0.3 compound. The TEC of the compounds is close to the values of ceria-based electrolytes. PSFN showed hysteresis in the temperature dependence of the conductivity, TEC and area-specific polarization resistance R_pol. It is considered that the hysteresis was caused by relatively slow adjustment of the oxygen stoichiometry. The electrochemical performance R_pol ^-1 of the PSFN compounds is similar to that of La _0.6Sr_0.4Fe_0.8Co_0.2O _3-δ.

Original language	English
Pages (from-to)	1013-1020
Number of pages	8
Journal	Solid State Ionics
Volume	176
Issue number	11-12
DOIs	https://doi.org/10.1016/j.ssi.2004.09.010
Publication status	Published - 2005 Mar 31

Keywords

Cathode
Conductivity
Perovskite
Point electrode
Thermal expansion coefficient

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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@article{d241dff70414421f9c3aa815b604af94,

title = "A study of Pr0.7Sr0.3Fe1-xNi xO3-δ as a cathode material for SOFCs with intermediate operating temperature",

abstract = "Pr0.7Sr0.3Fe1-xNixO 3-δ(PSFN; x=0.2-0.5) compounds were synthesized and characterized by powder X-ray diffraction (XRD), thermal expansion coefficient (TEC) measurements, electrical conductivity and electrochemical impedance spectroscopy on cone-shaped electrodes on a Ce0.9Gd 0.1O1.95 (CGO10) electrolyte. The main phase of the powders belongs to the orthorhombic crystal system. The conductivities are fairly high, e.g., around 450 Scm-1 at 600 °C for the x=0.3 compound. The TEC of the compounds is close to the values of ceria-based electrolytes. PSFN showed hysteresis in the temperature dependence of the conductivity, TEC and area-specific polarization resistance Rpol. It is considered that the hysteresis was caused by relatively slow adjustment of the oxygen stoichiometry. The electrochemical performance Rpol -1 of the PSFN compounds is similar to that of La 0.6Sr0.4Fe0.8Co0.2O 3-δ.",

keywords = "Cathode, Conductivity, Perovskite, Point electrode, Thermal expansion coefficient",

author = "Hashimoto, {Shin Ichi} and Kent Kammer and Larsen, {Peter Halvor} and Poulsen, {Finn Willy} and Mogens Mogensen",

note = "Funding Information: This work was supported by the Danish Energy Agency, contract no. 1443/02-0001 EFP 2002 DK-SOFC b, long term R&D. The help from all in the SOFC group at Ris{\o} is appreciated.",

year = "2005",

month = mar,

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doi = "10.1016/j.ssi.2004.09.010",

language = "English",

volume = "176",

pages = "1013--1020",

journal = "Solid State Ionics",

issn = "0167-2738",

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T1 - A study of Pr0.7Sr0.3Fe1-xNi xO3-δ as a cathode material for SOFCs with intermediate operating temperature

AU - Hashimoto, Shin Ichi

AU - Kammer, Kent

AU - Larsen, Peter Halvor

AU - Poulsen, Finn Willy

AU - Mogensen, Mogens

N1 - Funding Information: This work was supported by the Danish Energy Agency, contract no. 1443/02-0001 EFP 2002 DK-SOFC b, long term R&D. The help from all in the SOFC group at Risø is appreciated.

PY - 2005/3/31

Y1 - 2005/3/31

N2 - Pr0.7Sr0.3Fe1-xNixO 3-δ(PSFN; x=0.2-0.5) compounds were synthesized and characterized by powder X-ray diffraction (XRD), thermal expansion coefficient (TEC) measurements, electrical conductivity and electrochemical impedance spectroscopy on cone-shaped electrodes on a Ce0.9Gd 0.1O1.95 (CGO10) electrolyte. The main phase of the powders belongs to the orthorhombic crystal system. The conductivities are fairly high, e.g., around 450 Scm-1 at 600 °C for the x=0.3 compound. The TEC of the compounds is close to the values of ceria-based electrolytes. PSFN showed hysteresis in the temperature dependence of the conductivity, TEC and area-specific polarization resistance Rpol. It is considered that the hysteresis was caused by relatively slow adjustment of the oxygen stoichiometry. The electrochemical performance Rpol -1 of the PSFN compounds is similar to that of La 0.6Sr0.4Fe0.8Co0.2O 3-δ.

AB - Pr0.7Sr0.3Fe1-xNixO 3-δ(PSFN; x=0.2-0.5) compounds were synthesized and characterized by powder X-ray diffraction (XRD), thermal expansion coefficient (TEC) measurements, electrical conductivity and electrochemical impedance spectroscopy on cone-shaped electrodes on a Ce0.9Gd 0.1O1.95 (CGO10) electrolyte. The main phase of the powders belongs to the orthorhombic crystal system. The conductivities are fairly high, e.g., around 450 Scm-1 at 600 °C for the x=0.3 compound. The TEC of the compounds is close to the values of ceria-based electrolytes. PSFN showed hysteresis in the temperature dependence of the conductivity, TEC and area-specific polarization resistance Rpol. It is considered that the hysteresis was caused by relatively slow adjustment of the oxygen stoichiometry. The electrochemical performance Rpol -1 of the PSFN compounds is similar to that of La 0.6Sr0.4Fe0.8Co0.2O 3-δ.

KW - Cathode

KW - Conductivity

KW - Perovskite

KW - Point electrode

KW - Thermal expansion coefficient

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