Tailoring the chemical stability of cobalt-rich perovskite mixed conductor

Fang Wang; Koki Igarashi; Takashi Nakamura; Keiji Yashiro; Junichiro Mizusaki; Koji Amezawa

doi:10.1016/j.ssi.2016.01.018

Tailoring the chemical stability of cobalt-rich perovskite mixed conductor

Fang Wang, Koki Igarashi, Takashi Nakamura, Keiji Yashiro, Junichiro Mizusaki, Koji Amezawa

ENV - Environmental Studies for Advanced Society

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

6 Citations (Scopus)

Abstract

In this paper we try to tailor the chemical stability of cobalt-rich perovskite Ba_0.5Sr_0.5Co_0.8Fe_0.2O_{3 - δ} (BSCF) by B-site doping Sb. The chemical stability of Ba_0.5Sr_0.5Co_0.8Fe_0.1Sb_0.1O_{3 - δ} (BSCFS) was investigated by studying the oxygen nonstoichiometry, crystal structure and oxidation state by means of coulometric titration, high-temperature X-ray diffraction (HT-XRD) and soft-X-ray absorption spectroscopy (s-XAS) in various oxygen pressure (p(O₂)) and temperatures. The results prove that chemical stability of BSCFS is successfully improved in intermediate temperature solid oxide fuel cell working condition owing to Co valence change which is controlled by high valence cation doping.

Original language	English
Pages (from-to)	2-5
Number of pages	4
Journal	Solid State Ionics
Volume	288
DOIs	https://doi.org/10.1016/j.ssi.2016.01.018
Publication status	Published - 2016 May 1

Keywords

BSCF
Chemical stability
Oxygen nonstoichiometry
Soft XAS

ASJC Scopus subject areas

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

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10.1016/j.ssi.2016.01.018

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title = "Tailoring the chemical stability of cobalt-rich perovskite mixed conductor",

abstract = "In this paper we try to tailor the chemical stability of cobalt-rich perovskite Ba0.5Sr0.5Co0.8Fe0.2O3 - δ (BSCF) by B-site doping Sb. The chemical stability of Ba0.5Sr0.5Co0.8Fe0.1Sb0.1O3 - δ (BSCFS) was investigated by studying the oxygen nonstoichiometry, crystal structure and oxidation state by means of coulometric titration, high-temperature X-ray diffraction (HT-XRD) and soft-X-ray absorption spectroscopy (s-XAS) in various oxygen pressure (p(O2)) and temperatures. The results prove that chemical stability of BSCFS is successfully improved in intermediate temperature solid oxide fuel cell working condition owing to Co valence change which is controlled by high valence cation doping.",

keywords = "BSCF, Chemical stability, Oxygen nonstoichiometry, Soft XAS",

author = "Fang Wang and Koki Igarashi and Takashi Nakamura and Keiji Yashiro and Junichiro Mizusaki and Koji Amezawa",

note = "Funding Information: This work was supported by the CREST from the Japan Science and Technology Agency (JST) and Grant-in-Aid for Scientific Research of MEXT (26289233), Japan and was partly supported by A-STEP, JST, (AS262Z02096L) Japan. Publisher Copyright: {\textcopyright} 2016 Elsevier B.V. All rights reserved.",

year = "2016",

month = may,

day = "1",

doi = "10.1016/j.ssi.2016.01.018",

language = "English",

volume = "288",

pages = "2--5",

journal = "Solid State Ionics",

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TY - JOUR

T1 - Tailoring the chemical stability of cobalt-rich perovskite mixed conductor

AU - Wang, Fang

AU - Igarashi, Koki

AU - Nakamura, Takashi

AU - Yashiro, Keiji

AU - Mizusaki, Junichiro

AU - Amezawa, Koji

N1 - Funding Information: This work was supported by the CREST from the Japan Science and Technology Agency (JST) and Grant-in-Aid for Scientific Research of MEXT (26289233), Japan and was partly supported by A-STEP, JST, (AS262Z02096L) Japan. Publisher Copyright: © 2016 Elsevier B.V. All rights reserved.

PY - 2016/5/1

Y1 - 2016/5/1

N2 - In this paper we try to tailor the chemical stability of cobalt-rich perovskite Ba0.5Sr0.5Co0.8Fe0.2O3 - δ (BSCF) by B-site doping Sb. The chemical stability of Ba0.5Sr0.5Co0.8Fe0.1Sb0.1O3 - δ (BSCFS) was investigated by studying the oxygen nonstoichiometry, crystal structure and oxidation state by means of coulometric titration, high-temperature X-ray diffraction (HT-XRD) and soft-X-ray absorption spectroscopy (s-XAS) in various oxygen pressure (p(O2)) and temperatures. The results prove that chemical stability of BSCFS is successfully improved in intermediate temperature solid oxide fuel cell working condition owing to Co valence change which is controlled by high valence cation doping.

AB - In this paper we try to tailor the chemical stability of cobalt-rich perovskite Ba0.5Sr0.5Co0.8Fe0.2O3 - δ (BSCF) by B-site doping Sb. The chemical stability of Ba0.5Sr0.5Co0.8Fe0.1Sb0.1O3 - δ (BSCFS) was investigated by studying the oxygen nonstoichiometry, crystal structure and oxidation state by means of coulometric titration, high-temperature X-ray diffraction (HT-XRD) and soft-X-ray absorption spectroscopy (s-XAS) in various oxygen pressure (p(O2)) and temperatures. The results prove that chemical stability of BSCFS is successfully improved in intermediate temperature solid oxide fuel cell working condition owing to Co valence change which is controlled by high valence cation doping.

KW - BSCF

KW - Chemical stability

KW - Oxygen nonstoichiometry

KW - Soft XAS

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U2 - 10.1016/j.ssi.2016.01.018

DO - 10.1016/j.ssi.2016.01.018

M3 - Article

AN - SCOPUS:84955620095

SN - 0167-2738

VL - 288

SP - 2

EP - 5

JO - Solid State Ionics

JF - Solid State Ionics

ER -

Tailoring the chemical stability of cobalt-rich perovskite mixed conductor

Abstract

Keywords

ASJC Scopus subject areas

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