Effect of titania concentration on the grain boundary conductivity of Ce0.8Gd0.2O1.9 electrolyte

Lin Ge; Ruifeng Li; Shoucheng He; Han Chen; Lucun Guo

doi:10.1016/j.ijhydene.2012.08.031

Effect of titania concentration on the grain boundary conductivity of Ce_0.8Gd_0.2O_1.9 electrolyte

Lin Ge, Ruifeng Li, Shoucheng He, Han Chen, Lucun Guo

College of Materials Science and Engineering

Nanjing Tech University

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

22 Scopus citations

Abstract

The effect of titania (TiO₂) addition on the densification, crystal structure and electrical property of Ce_0.8Gd _0.2O_1.9 (GDC) are examined. TiO₂ addition reduces GDC sintering temperature by ∼200 °C and considerably improves grain boundary conduction. The minimum grain boundary resistivity is obtained at 0.8 mol% TiO₂ concentration. XRD analysis suggests that the solubility limit of TiO₂ in GDC is ∼0.6 mol%. The optimum doping level (0.8 mol%) is slightly higher than the solubility limit (0.6 mol%), which implies that a small amounts of TiO₂ (∼0.2 mol%) at the grain boundaries benefits the grain-boundary conduction.

Original language	English
Pages (from-to)	16123-16129
Number of pages	7
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	21
DOIs	https://doi.org/10.1016/j.ijhydene.2012.08.031
State	Published - Nov 2012

Keywords

Doped ceria
Grain-boundary conduction
Solid oxide fuel cell
Titania

UN SDGs

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

Access to Document

10.1016/j.ijhydene.2012.08.031

Cite this

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title = "Effect of titania concentration on the grain boundary conductivity of Ce0.8Gd0.2O1.9 electrolyte",

abstract = "The effect of titania (TiO2) addition on the densification, crystal structure and electrical property of Ce0.8Gd 0.2O1.9 (GDC) are examined. TiO2 addition reduces GDC sintering temperature by ∼200 °C and considerably improves grain boundary conduction. The minimum grain boundary resistivity is obtained at 0.8 mol% TiO2 concentration. XRD analysis suggests that the solubility limit of TiO2 in GDC is ∼0.6 mol%. The optimum doping level (0.8 mol%) is slightly higher than the solubility limit (0.6 mol%), which implies that a small amounts of TiO2 (∼0.2 mol%) at the grain boundaries benefits the grain-boundary conduction.",

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author = "Lin Ge and Ruifeng Li and Shoucheng He and Han Chen and Lucun Guo",

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T1 - Effect of titania concentration on the grain boundary conductivity of Ce0.8Gd0.2O1.9 electrolyte

AU - Ge, Lin

AU - Li, Ruifeng

AU - He, Shoucheng

AU - Chen, Han

AU - Guo, Lucun

PY - 2012/11

Y1 - 2012/11

N2 - The effect of titania (TiO2) addition on the densification, crystal structure and electrical property of Ce0.8Gd 0.2O1.9 (GDC) are examined. TiO2 addition reduces GDC sintering temperature by ∼200 °C and considerably improves grain boundary conduction. The minimum grain boundary resistivity is obtained at 0.8 mol% TiO2 concentration. XRD analysis suggests that the solubility limit of TiO2 in GDC is ∼0.6 mol%. The optimum doping level (0.8 mol%) is slightly higher than the solubility limit (0.6 mol%), which implies that a small amounts of TiO2 (∼0.2 mol%) at the grain boundaries benefits the grain-boundary conduction.

AB - The effect of titania (TiO2) addition on the densification, crystal structure and electrical property of Ce0.8Gd 0.2O1.9 (GDC) are examined. TiO2 addition reduces GDC sintering temperature by ∼200 °C and considerably improves grain boundary conduction. The minimum grain boundary resistivity is obtained at 0.8 mol% TiO2 concentration. XRD analysis suggests that the solubility limit of TiO2 in GDC is ∼0.6 mol%. The optimum doping level (0.8 mol%) is slightly higher than the solubility limit (0.6 mol%), which implies that a small amounts of TiO2 (∼0.2 mol%) at the grain boundaries benefits the grain-boundary conduction.

KW - Doped ceria

KW - Grain-boundary conduction

KW - Solid oxide fuel cell

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