Highly resistive intergranular phases in solid electrolytes: An overview

Jong Heun Lee

doi:10.1007/s00706-009-0111-0

Highly resistive intergranular phases in solid electrolytes: An overview

Jong Heun Lee

Research output: Contribution to journal › Review article › peer-review

21 Citations (Scopus)

Abstract

The siliceous intergranular phase in acceptor-doped zirconia and ceria and its effect on the ionic conduction across the grain boundaries were reviewed. Not only the abundant siliceous intergranular liquid phase, but also the monolayer-level siliceous intergranular segregation significantly deteriorates the grain-boundary conduction. To decrease the harmful effect of the resistive siliceous phase at the grain boundary, 'additive scavenging' or 'precursor scavenging' can be employed. The former involves the addition of a secondary phase or another acceptor material with a very high chemical affinity for the siliceous phase, while the latter involves the intergranular phase changing from having a continuous (blocking) configuration to having a discrete (non-blocking) configuration. The mechanisms of various scavenging reactions have been explained, compared, and discussed.

Original language	English
Pages (from-to)	1081-1094
Number of pages	14
Journal	Monatshefte fur Chemie
Volume	140
Issue number	9
DOIs	https://doi.org/10.1007/s00706-009-0111-0
Publication status	Published - 2009 Sept

Bibliographical note

Funding Information:
This work was supported by KOSEF NRL program grant funded by the Korean government (MEST) (no. R0A-2008-000-20032-0).

Keywords

Ceramics
Charge transfer
Electrochemistry
Grain-boundary conduction
Intergranular phase

ASJC Scopus subject areas

General Chemistry

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10.1007/s00706-009-0111-0

Cite this

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title = "Highly resistive intergranular phases in solid electrolytes: An overview",

abstract = "The siliceous intergranular phase in acceptor-doped zirconia and ceria and its effect on the ionic conduction across the grain boundaries were reviewed. Not only the abundant siliceous intergranular liquid phase, but also the monolayer-level siliceous intergranular segregation significantly deteriorates the grain-boundary conduction. To decrease the harmful effect of the resistive siliceous phase at the grain boundary, 'additive scavenging' or 'precursor scavenging' can be employed. The former involves the addition of a secondary phase or another acceptor material with a very high chemical affinity for the siliceous phase, while the latter involves the intergranular phase changing from having a continuous (blocking) configuration to having a discrete (non-blocking) configuration. The mechanisms of various scavenging reactions have been explained, compared, and discussed.",

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author = "Lee, {Jong Heun}",

note = "Funding Information: This work was supported by KOSEF NRL program grant funded by the Korean government (MEST) (no. R0A-2008-000-20032-0).",

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T2 - An overview

AU - Lee, Jong Heun

N1 - Funding Information: This work was supported by KOSEF NRL program grant funded by the Korean government (MEST) (no. R0A-2008-000-20032-0).

PY - 2009/9

Y1 - 2009/9

N2 - The siliceous intergranular phase in acceptor-doped zirconia and ceria and its effect on the ionic conduction across the grain boundaries were reviewed. Not only the abundant siliceous intergranular liquid phase, but also the monolayer-level siliceous intergranular segregation significantly deteriorates the grain-boundary conduction. To decrease the harmful effect of the resistive siliceous phase at the grain boundary, 'additive scavenging' or 'precursor scavenging' can be employed. The former involves the addition of a secondary phase or another acceptor material with a very high chemical affinity for the siliceous phase, while the latter involves the intergranular phase changing from having a continuous (blocking) configuration to having a discrete (non-blocking) configuration. The mechanisms of various scavenging reactions have been explained, compared, and discussed.

AB - The siliceous intergranular phase in acceptor-doped zirconia and ceria and its effect on the ionic conduction across the grain boundaries were reviewed. Not only the abundant siliceous intergranular liquid phase, but also the monolayer-level siliceous intergranular segregation significantly deteriorates the grain-boundary conduction. To decrease the harmful effect of the resistive siliceous phase at the grain boundary, 'additive scavenging' or 'precursor scavenging' can be employed. The former involves the addition of a secondary phase or another acceptor material with a very high chemical affinity for the siliceous phase, while the latter involves the intergranular phase changing from having a continuous (blocking) configuration to having a discrete (non-blocking) configuration. The mechanisms of various scavenging reactions have been explained, compared, and discussed.

KW - Ceramics

KW - Charge transfer

KW - Electrochemistry

KW - Grain-boundary conduction

KW - Intergranular phase

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SN - 0026-9247

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JF - Monatshefte fur Chemie

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Highly resistive intergranular phases in solid electrolytes: An overview

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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