Lowerature sintering and electrical properties of strontium- and magnesium-doped lanthanum gallate with V2O5 additive

Sang Bu Ha; Yoon Ho Cho; Ho Il Ji; Jong Ho Lee; Yun Chan Kang; Jong Heun Lee

doi:10.1016/j.jpowsour.2010.11.082

Lowerature sintering and electrical properties of strontium- and magnesium-doped lanthanum gallate with V₂O₅ additive

Sang Bu Ha, Yoon Ho Cho, Ho Il Ji, Jong Ho Lee, Yun Chan Kang, Jong Heun Lee

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

11 Citations (Scopus)

Abstract

The effects of a V₂O₅ additive on the lowerature sintering and ionic conductivity of strontium- and magnesium-doped lanthanum gallate (LSGM: La_0.8Sr_0.2Ga_0.8Mg _0.2O_2.8) are studied. The LSGM powders prepared by the glycine nitrate method are mixed with 0.5-2 at.% of VO_5/2 and then sintered at 1100-1400 °C in air for 4 h. The apparent density and phase purity of the LSGM specimens are increased with increasing sintering temperature and VO_5/2 concentration due to the enhanced sintering and mass transfer via the intergranular liquid phase. The 1 at.% VO_5/2-doped LSGM specimen sintered at 1300 °C exhibits a high oxide ion conductivity of ∼0.027 S cm^-1 at 700 °C over a wide range of oxygen partial pressure (PO2=10-27-1atm), thereby demonstrating its potential as a useful electrolyte for anode-supported solid oxide fuel cells (SOFCs) without the requirement for any buffer layer between the electrolyte and anode.

Original language	English
Pages (from-to)	2971-2978
Number of pages	8
Journal	Journal of Power Sources
Volume	196
Issue number	6
DOIs	https://doi.org/10.1016/j.jpowsour.2010.11.082
Publication status	Published - 2011 Mar 15

Keywords

Oxide ion conductivity
Phase purity
Sintering additive
Solid oxide fuel cell
Strontium- and magnesium-doped lanthanum gallate
Vanadium oxide

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2010.11.082

Cite this

@article{123375d166f54d328e48b3b6df68c520,

title = "Lowerature sintering and electrical properties of strontium- and magnesium-doped lanthanum gallate with V2O5 additive",

abstract = "The effects of a V2O5 additive on the lowerature sintering and ionic conductivity of strontium- and magnesium-doped lanthanum gallate (LSGM: La0.8Sr0.2Ga0.8Mg 0.2O2.8) are studied. The LSGM powders prepared by the glycine nitrate method are mixed with 0.5-2 at.% of VO5/2 and then sintered at 1100-1400 °C in air for 4 h. The apparent density and phase purity of the LSGM specimens are increased with increasing sintering temperature and VO5/2 concentration due to the enhanced sintering and mass transfer via the intergranular liquid phase. The 1 at.% VO5/2-doped LSGM specimen sintered at 1300 °C exhibits a high oxide ion conductivity of ∼0.027 S cm-1 at 700 °C over a wide range of oxygen partial pressure (PO2=10-27-1atm), thereby demonstrating its potential as a useful electrolyte for anode-supported solid oxide fuel cells (SOFCs) without the requirement for any buffer layer between the electrolyte and anode.",

keywords = "Oxide ion conductivity, Phase purity, Sintering additive, Solid oxide fuel cell, Strontium- and magnesium-doped lanthanum gallate, Vanadium oxide",

author = "Ha, {Sang Bu} and Cho, {Yoon Ho} and Ji, {Ho Il} and Lee, {Jong Ho} and Kang, {Yun Chan} and Lee, {Jong Heun}",

note = "Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) NRL program grant funded by the Korean Government (MEST) (no. R0A-2008-000-20032-0 ) and by the New & Renewable Energy R&D program ( 20093020030040 ) under the Korea Ministry of Knowledge Economy (MKE) .",

year = "2011",

month = mar,

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doi = "10.1016/j.jpowsour.2010.11.082",

language = "English",

volume = "196",

pages = "2971--2978",

journal = "Journal of Power Sources",

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TY - JOUR

T1 - Lowerature sintering and electrical properties of strontium- and magnesium-doped lanthanum gallate with V2O5 additive

AU - Ha, Sang Bu

AU - Cho, Yoon Ho

AU - Ji, Ho Il

AU - Lee, Jong Ho

AU - Kang, Yun Chan

AU - Lee, Jong Heun

N1 - Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) NRL program grant funded by the Korean Government (MEST) (no. R0A-2008-000-20032-0 ) and by the New & Renewable Energy R&D program ( 20093020030040 ) under the Korea Ministry of Knowledge Economy (MKE) .

PY - 2011/3/15

Y1 - 2011/3/15

N2 - The effects of a V2O5 additive on the lowerature sintering and ionic conductivity of strontium- and magnesium-doped lanthanum gallate (LSGM: La0.8Sr0.2Ga0.8Mg 0.2O2.8) are studied. The LSGM powders prepared by the glycine nitrate method are mixed with 0.5-2 at.% of VO5/2 and then sintered at 1100-1400 °C in air for 4 h. The apparent density and phase purity of the LSGM specimens are increased with increasing sintering temperature and VO5/2 concentration due to the enhanced sintering and mass transfer via the intergranular liquid phase. The 1 at.% VO5/2-doped LSGM specimen sintered at 1300 °C exhibits a high oxide ion conductivity of ∼0.027 S cm-1 at 700 °C over a wide range of oxygen partial pressure (PO2=10-27-1atm), thereby demonstrating its potential as a useful electrolyte for anode-supported solid oxide fuel cells (SOFCs) without the requirement for any buffer layer between the electrolyte and anode.

AB - The effects of a V2O5 additive on the lowerature sintering and ionic conductivity of strontium- and magnesium-doped lanthanum gallate (LSGM: La0.8Sr0.2Ga0.8Mg 0.2O2.8) are studied. The LSGM powders prepared by the glycine nitrate method are mixed with 0.5-2 at.% of VO5/2 and then sintered at 1100-1400 °C in air for 4 h. The apparent density and phase purity of the LSGM specimens are increased with increasing sintering temperature and VO5/2 concentration due to the enhanced sintering and mass transfer via the intergranular liquid phase. The 1 at.% VO5/2-doped LSGM specimen sintered at 1300 °C exhibits a high oxide ion conductivity of ∼0.027 S cm-1 at 700 °C over a wide range of oxygen partial pressure (PO2=10-27-1atm), thereby demonstrating its potential as a useful electrolyte for anode-supported solid oxide fuel cells (SOFCs) without the requirement for any buffer layer between the electrolyte and anode.

KW - Oxide ion conductivity

KW - Phase purity

KW - Sintering additive

KW - Solid oxide fuel cell

KW - Strontium- and magnesium-doped lanthanum gallate

KW - Vanadium oxide

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