Effect of volatile boron species on the microstructure and composition of (La,Sr)MnO3 and (La,Sr)(Co,Fe)O3 cathode materials of solid oxide fuel cells

Kongfa Chen, Junji Hyodo, Ling Zhao, Na Ai, Tatsumi Ishihara, San Ping Jiang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Effect of volatile boron species on the microstructure and composition of dense La0.8Sr0.2MnO3 (LSM) and La 0.6Sr0.4Co0.2Fe0.8O3 (LSCF) bar samples is studied in detail using secondary ion mass spectroscopy (SIMS) technique. Prior to the characterization, the bar samples were heat-treated at 800°C in air in the presence of borosilicate glass for 7 and 30 days. SIMS detected the deposition of boron as well as sodium and potassium on the surface and in the bulk of the bar samples. The boron deposition results in significant microstructure and composition changes. SIMS, EDS and XRD confirm that Sr in the form of SrB2O4 is enriched on the outmost surface, leading to the Sr-deficient in the adjacent layer in the bulk. In the case of LSM bar samples, the interaction between boron and LSM leads to the formation of LaBO3 and consequently the decomposition of the LSM perovskite structure. The present study demonstrates the remarkable detrimental effect of volatile boron species on the microstructure of the LSM and LSCF cathode materials of solid oxide fuel cells, and LSCF is more reactive with boron as compared to LSM.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume160
Issue number9
DOIs
Publication statusPublished - Aug 20 2013

Fingerprint

Boron
Solid oxide fuel cells (SOFC)
Cathodes
Microstructure
Chemical analysis
Spectroscopy
Ions
Borosilicate glass
Perovskite
Potassium
Energy dispersive spectroscopy
Sodium
Decomposition
Air

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Effect of volatile boron species on the microstructure and composition of (La,Sr)MnO3 and (La,Sr)(Co,Fe)O3 cathode materials of solid oxide fuel cells. / Chen, Kongfa; Hyodo, Junji; Zhao, Ling; Ai, Na; Ishihara, Tatsumi; Jiang, San Ping.

In: Journal of the Electrochemical Society, Vol. 160, No. 9, 20.08.2013.

Research output: Contribution to journalArticle

@article{c24eff69353844b38b28d59afa16ba06,
title = "Effect of volatile boron species on the microstructure and composition of (La,Sr)MnO3 and (La,Sr)(Co,Fe)O3 cathode materials of solid oxide fuel cells",
abstract = "Effect of volatile boron species on the microstructure and composition of dense La0.8Sr0.2MnO3 (LSM) and La 0.6Sr0.4Co0.2Fe0.8O3 (LSCF) bar samples is studied in detail using secondary ion mass spectroscopy (SIMS) technique. Prior to the characterization, the bar samples were heat-treated at 800°C in air in the presence of borosilicate glass for 7 and 30 days. SIMS detected the deposition of boron as well as sodium and potassium on the surface and in the bulk of the bar samples. The boron deposition results in significant microstructure and composition changes. SIMS, EDS and XRD confirm that Sr in the form of SrB2O4 is enriched on the outmost surface, leading to the Sr-deficient in the adjacent layer in the bulk. In the case of LSM bar samples, the interaction between boron and LSM leads to the formation of LaBO3 and consequently the decomposition of the LSM perovskite structure. The present study demonstrates the remarkable detrimental effect of volatile boron species on the microstructure of the LSM and LSCF cathode materials of solid oxide fuel cells, and LSCF is more reactive with boron as compared to LSM.",
author = "Kongfa Chen and Junji Hyodo and Ling Zhao and Na Ai and Tatsumi Ishihara and Jiang, {San Ping}",
year = "2013",
month = "8",
day = "20",
doi = "10.1149/2.090309jes",
language = "English",
volume = "160",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "9",

}

TY - JOUR

T1 - Effect of volatile boron species on the microstructure and composition of (La,Sr)MnO3 and (La,Sr)(Co,Fe)O3 cathode materials of solid oxide fuel cells

AU - Chen, Kongfa

AU - Hyodo, Junji

AU - Zhao, Ling

AU - Ai, Na

AU - Ishihara, Tatsumi

AU - Jiang, San Ping

PY - 2013/8/20

Y1 - 2013/8/20

N2 - Effect of volatile boron species on the microstructure and composition of dense La0.8Sr0.2MnO3 (LSM) and La 0.6Sr0.4Co0.2Fe0.8O3 (LSCF) bar samples is studied in detail using secondary ion mass spectroscopy (SIMS) technique. Prior to the characterization, the bar samples were heat-treated at 800°C in air in the presence of borosilicate glass for 7 and 30 days. SIMS detected the deposition of boron as well as sodium and potassium on the surface and in the bulk of the bar samples. The boron deposition results in significant microstructure and composition changes. SIMS, EDS and XRD confirm that Sr in the form of SrB2O4 is enriched on the outmost surface, leading to the Sr-deficient in the adjacent layer in the bulk. In the case of LSM bar samples, the interaction between boron and LSM leads to the formation of LaBO3 and consequently the decomposition of the LSM perovskite structure. The present study demonstrates the remarkable detrimental effect of volatile boron species on the microstructure of the LSM and LSCF cathode materials of solid oxide fuel cells, and LSCF is more reactive with boron as compared to LSM.

AB - Effect of volatile boron species on the microstructure and composition of dense La0.8Sr0.2MnO3 (LSM) and La 0.6Sr0.4Co0.2Fe0.8O3 (LSCF) bar samples is studied in detail using secondary ion mass spectroscopy (SIMS) technique. Prior to the characterization, the bar samples were heat-treated at 800°C in air in the presence of borosilicate glass for 7 and 30 days. SIMS detected the deposition of boron as well as sodium and potassium on the surface and in the bulk of the bar samples. The boron deposition results in significant microstructure and composition changes. SIMS, EDS and XRD confirm that Sr in the form of SrB2O4 is enriched on the outmost surface, leading to the Sr-deficient in the adjacent layer in the bulk. In the case of LSM bar samples, the interaction between boron and LSM leads to the formation of LaBO3 and consequently the decomposition of the LSM perovskite structure. The present study demonstrates the remarkable detrimental effect of volatile boron species on the microstructure of the LSM and LSCF cathode materials of solid oxide fuel cells, and LSCF is more reactive with boron as compared to LSM.

UR - http://www.scopus.com/inward/record.url?scp=84881506505&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84881506505&partnerID=8YFLogxK

U2 - 10.1149/2.090309jes

DO - 10.1149/2.090309jes

M3 - Article

AN - SCOPUS:84881506505

VL - 160

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 9

ER -