Influence of oxygen ion enrichment on optical, mechanical, and electrical properties of LSCF perovskite nanocomposite

S. A. Muhammed Ali, Mustafa Anwar, Nurul Ashikin, Andanastuti Muchtar, Mahendra Rao Somalu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) is a mixed ionic electronic conductor with excellent surface catalytic activity for oxygen reduction. This work demonstrated that introduction of pure oxygen ion conductor to LSCF particles can significantly influence in-plane electronic conduction at the surface of LSCF-samarium-doped ceria (SDC) composite. The composite functional layer was prepared by mixing 50 wt% SDC particles with LSCF particles obtained from glycine–nitrate process. Homogeneous LSCF-SDC composite layer deposited by screen printing on an SDC substrate has been studied with and without LSCF current-collecting layer (CCL). The microstructural, optical, Raman, mechanical and electrical properties, and interfacial polarization resistance (Rp) of the prepared powders were evaluated. Results revealed that addition of oxygen ion conductor SDC exerted negligible effect on the phase structure and specific surface area but significantly influenced the band gap, oxygen vacancies, and electrical conductivity of LSCF. SDC addition significantly increased area specific resistance (ASR) of LSCF from 0.138 Ω cm2 to 0.481 Ω cm2 at 800 °C, thereby blocking the conduction path among LSCF particles. Rp value of LSCF-SDC composite can be improved by more than six times by enlarging the in-plane electronic conduction with thin CCL. Electrochemical measurement revealed that LSCF CCL reduced the Rp value, resulting in the lowest ASR of 0.087 Ω cm2 at 800 °C for the LSCF–SDC composite.

Original languageEnglish
Pages (from-to)10433-10442
Number of pages10
JournalCeramics International
Volume44
Issue number9
DOIs
Publication statusPublished - 15 Jun 2018

Fingerprint

Samarium
Cerium compounds
Perovskite
Nanocomposites
Electric properties
Optical properties
Ions
Oxygen
Mechanical properties
Composite materials
Screen printing
Oxygen vacancies
Phase structure
perovskite
Specific surface area
Powders
Catalyst activity
Energy gap
Polarization
Substrates

Keywords

  • B. Composites
  • C. Electrical conductivity
  • C. Hardness
  • C. Optical properties
  • D. Perovskites
  • E. Electrodes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Influence of oxygen ion enrichment on optical, mechanical, and electrical properties of LSCF perovskite nanocomposite. / Muhammed Ali, S. A.; Anwar, Mustafa; Ashikin, Nurul; Muchtar, Andanastuti; Somalu, Mahendra Rao.

In: Ceramics International, Vol. 44, No. 9, 15.06.2018, p. 10433-10442.

Research output: Contribution to journalArticle

@article{7b95a3cf29994dd8ad44a70acc52b68d,
title = "Influence of oxygen ion enrichment on optical, mechanical, and electrical properties of LSCF perovskite nanocomposite",
abstract = "La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) is a mixed ionic electronic conductor with excellent surface catalytic activity for oxygen reduction. This work demonstrated that introduction of pure oxygen ion conductor to LSCF particles can significantly influence in-plane electronic conduction at the surface of LSCF-samarium-doped ceria (SDC) composite. The composite functional layer was prepared by mixing 50 wt{\%} SDC particles with LSCF particles obtained from glycine–nitrate process. Homogeneous LSCF-SDC composite layer deposited by screen printing on an SDC substrate has been studied with and without LSCF current-collecting layer (CCL). The microstructural, optical, Raman, mechanical and electrical properties, and interfacial polarization resistance (Rp) of the prepared powders were evaluated. Results revealed that addition of oxygen ion conductor SDC exerted negligible effect on the phase structure and specific surface area but significantly influenced the band gap, oxygen vacancies, and electrical conductivity of LSCF. SDC addition significantly increased area specific resistance (ASR) of LSCF from 0.138 Ω cm2 to 0.481 Ω cm2 at 800 °C, thereby blocking the conduction path among LSCF particles. Rp value of LSCF-SDC composite can be improved by more than six times by enlarging the in-plane electronic conduction with thin CCL. Electrochemical measurement revealed that LSCF CCL reduced the Rp value, resulting in the lowest ASR of 0.087 Ω cm2 at 800 °C for the LSCF–SDC composite.",
keywords = "B. Composites, C. Electrical conductivity, C. Hardness, C. Optical properties, D. Perovskites, E. Electrodes",
author = "{Muhammed Ali}, {S. A.} and Mustafa Anwar and Nurul Ashikin and Andanastuti Muchtar and Somalu, {Mahendra Rao}",
year = "2018",
month = "6",
day = "15",
doi = "10.1016/j.ceramint.2018.03.060",
language = "English",
volume = "44",
pages = "10433--10442",
journal = "Ceramics International",
issn = "0272-8842",
publisher = "Elsevier Limited",
number = "9",

}

TY - JOUR

T1 - Influence of oxygen ion enrichment on optical, mechanical, and electrical properties of LSCF perovskite nanocomposite

AU - Muhammed Ali, S. A.

AU - Anwar, Mustafa

AU - Ashikin, Nurul

AU - Muchtar, Andanastuti

AU - Somalu, Mahendra Rao

PY - 2018/6/15

Y1 - 2018/6/15

N2 - La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) is a mixed ionic electronic conductor with excellent surface catalytic activity for oxygen reduction. This work demonstrated that introduction of pure oxygen ion conductor to LSCF particles can significantly influence in-plane electronic conduction at the surface of LSCF-samarium-doped ceria (SDC) composite. The composite functional layer was prepared by mixing 50 wt% SDC particles with LSCF particles obtained from glycine–nitrate process. Homogeneous LSCF-SDC composite layer deposited by screen printing on an SDC substrate has been studied with and without LSCF current-collecting layer (CCL). The microstructural, optical, Raman, mechanical and electrical properties, and interfacial polarization resistance (Rp) of the prepared powders were evaluated. Results revealed that addition of oxygen ion conductor SDC exerted negligible effect on the phase structure and specific surface area but significantly influenced the band gap, oxygen vacancies, and electrical conductivity of LSCF. SDC addition significantly increased area specific resistance (ASR) of LSCF from 0.138 Ω cm2 to 0.481 Ω cm2 at 800 °C, thereby blocking the conduction path among LSCF particles. Rp value of LSCF-SDC composite can be improved by more than six times by enlarging the in-plane electronic conduction with thin CCL. Electrochemical measurement revealed that LSCF CCL reduced the Rp value, resulting in the lowest ASR of 0.087 Ω cm2 at 800 °C for the LSCF–SDC composite.

AB - La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) is a mixed ionic electronic conductor with excellent surface catalytic activity for oxygen reduction. This work demonstrated that introduction of pure oxygen ion conductor to LSCF particles can significantly influence in-plane electronic conduction at the surface of LSCF-samarium-doped ceria (SDC) composite. The composite functional layer was prepared by mixing 50 wt% SDC particles with LSCF particles obtained from glycine–nitrate process. Homogeneous LSCF-SDC composite layer deposited by screen printing on an SDC substrate has been studied with and without LSCF current-collecting layer (CCL). The microstructural, optical, Raman, mechanical and electrical properties, and interfacial polarization resistance (Rp) of the prepared powders were evaluated. Results revealed that addition of oxygen ion conductor SDC exerted negligible effect on the phase structure and specific surface area but significantly influenced the band gap, oxygen vacancies, and electrical conductivity of LSCF. SDC addition significantly increased area specific resistance (ASR) of LSCF from 0.138 Ω cm2 to 0.481 Ω cm2 at 800 °C, thereby blocking the conduction path among LSCF particles. Rp value of LSCF-SDC composite can be improved by more than six times by enlarging the in-plane electronic conduction with thin CCL. Electrochemical measurement revealed that LSCF CCL reduced the Rp value, resulting in the lowest ASR of 0.087 Ω cm2 at 800 °C for the LSCF–SDC composite.

KW - B. Composites

KW - C. Electrical conductivity

KW - C. Hardness

KW - C. Optical properties

KW - D. Perovskites

KW - E. Electrodes

UR - http://www.scopus.com/inward/record.url?scp=85043523202&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85043523202&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2018.03.060

DO - 10.1016/j.ceramint.2018.03.060

M3 - Article

AN - SCOPUS:85043523202

VL - 44

SP - 10433

EP - 10442

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

IS - 9

ER -