Effect of cation doping on the physical properties and electrochemical performance of Nd0.6Sr0.4Co0.8M0.2O3-δ (M = Ti, Cr, Mn, Fe, Co, and Cu) cathodes

K. T. Lee; A. Manthiram

doi:10.1016/j.ssi.2007.04.010

Effect of cation doping on the physical properties and electrochemical performance of Nd_0.6Sr_0.4Co_0.8M_0.2O_3-δ (M = Ti, Cr, Mn, Fe, Co, and Cu) cathodes

K. T. Lee
, A. Manthiram^*

^*Corresponding author for this work

Electronic Materials Engineering

University of Texas at Austin

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

49 Scopus citations

Abstract

The effect of Mⁿ⁺ cation doping on the crystal chemistry, thermal expansion coefficient (TEC), electrical conductivity, and electrochemical performance in solid oxide fuel cells (SOFC) of the Nd_0.6Sr_0.4Co_0.8M_0.2O_3-δ (M = Ti, Cr, Mn, Fe, Co, and Cu) cathodes has been investigated. The samples form single-phase solid solutions with an orthorhombic perovskite structure. The degree of oxygen loss at high temperatures, TEC, and electrical conductivity decrease with the substitution of Mⁿ⁺ ions for Co^3+/4+ due to an increase in the thermal stability and bond strength and a decrease in the metal-oxygen covalency. The electrocatalytic activity measured with single cell SOFC decreases with Mⁿ⁺ doping due to a decrease in the oxygen exchange, oxygen mobility, and charge transfer reaction, resulting from a decrease in the electronic conductivity and the oxide ion vacancy concentration.

Original language	English
Pages (from-to)	995-1000
Number of pages	6
Journal	Solid State Ionics
Volume	178
Issue number	13-14
DOIs	https://doi.org/10.1016/j.ssi.2007.04.010
State	Published - 2007.05.31

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Cathode materials
Electrical conductivity
Electrochemical performance
Solid oxide fuel cells
Thermal expansion

Access to Document

10.1016/j.ssi.2007.04.010

Cite this

@article{998d36995d7a406595444a41a42b70d2,

title = "Effect of cation doping on the physical properties and electrochemical performance of Nd0.6Sr0.4Co0.8M0.2O3-δ (M = Ti, Cr, Mn, Fe, Co, and Cu) cathodes",

abstract = "The effect of Mn+ cation doping on the crystal chemistry, thermal expansion coefficient (TEC), electrical conductivity, and electrochemical performance in solid oxide fuel cells (SOFC) of the Nd0.6Sr0.4Co0.8M0.2O3-δ (M = Ti, Cr, Mn, Fe, Co, and Cu) cathodes has been investigated. The samples form single-phase solid solutions with an orthorhombic perovskite structure. The degree of oxygen loss at high temperatures, TEC, and electrical conductivity decrease with the substitution of Mn+ ions for Co3+/4+ due to an increase in the thermal stability and bond strength and a decrease in the metal-oxygen covalency. The electrocatalytic activity measured with single cell SOFC decreases with Mn+ doping due to a decrease in the oxygen exchange, oxygen mobility, and charge transfer reaction, resulting from a decrease in the electronic conductivity and the oxide ion vacancy concentration.",

keywords = "Cathode materials, Electrical conductivity, Electrochemical performance, Solid oxide fuel cells, Thermal expansion",

author = "Lee, \{K. T.\} and A. Manthiram",

year = "2007",

month = may,

day = "31",

doi = "10.1016/j.ssi.2007.04.010",

language = "English",

volume = "178",

pages = "995--1000",

journal = "Solid State Ionics",

issn = "0167-2738",

number = "13-14",

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TY - JOUR

T1 - Effect of cation doping on the physical properties and electrochemical performance of Nd0.6Sr0.4Co0.8M0.2O3-δ (M = Ti, Cr, Mn, Fe, Co, and Cu) cathodes

AU - Lee, K. T.

AU - Manthiram, A.

PY - 2007/5/31

Y1 - 2007/5/31

N2 - The effect of Mn+ cation doping on the crystal chemistry, thermal expansion coefficient (TEC), electrical conductivity, and electrochemical performance in solid oxide fuel cells (SOFC) of the Nd0.6Sr0.4Co0.8M0.2O3-δ (M = Ti, Cr, Mn, Fe, Co, and Cu) cathodes has been investigated. The samples form single-phase solid solutions with an orthorhombic perovskite structure. The degree of oxygen loss at high temperatures, TEC, and electrical conductivity decrease with the substitution of Mn+ ions for Co3+/4+ due to an increase in the thermal stability and bond strength and a decrease in the metal-oxygen covalency. The electrocatalytic activity measured with single cell SOFC decreases with Mn+ doping due to a decrease in the oxygen exchange, oxygen mobility, and charge transfer reaction, resulting from a decrease in the electronic conductivity and the oxide ion vacancy concentration.

AB - The effect of Mn+ cation doping on the crystal chemistry, thermal expansion coefficient (TEC), electrical conductivity, and electrochemical performance in solid oxide fuel cells (SOFC) of the Nd0.6Sr0.4Co0.8M0.2O3-δ (M = Ti, Cr, Mn, Fe, Co, and Cu) cathodes has been investigated. The samples form single-phase solid solutions with an orthorhombic perovskite structure. The degree of oxygen loss at high temperatures, TEC, and electrical conductivity decrease with the substitution of Mn+ ions for Co3+/4+ due to an increase in the thermal stability and bond strength and a decrease in the metal-oxygen covalency. The electrocatalytic activity measured with single cell SOFC decreases with Mn+ doping due to a decrease in the oxygen exchange, oxygen mobility, and charge transfer reaction, resulting from a decrease in the electronic conductivity and the oxide ion vacancy concentration.

KW - Cathode materials

KW - Electrical conductivity

KW - Electrochemical performance

KW - Solid oxide fuel cells

KW - Thermal expansion

UR - https://www.scopus.com/pages/publications/34249994854

U2 - 10.1016/j.ssi.2007.04.010

DO - 10.1016/j.ssi.2007.04.010

M3 - Journal article

AN - SCOPUS:34249994854

SN - 0167-2738

VL - 178

SP - 995

EP - 1000

JO - Solid State Ionics

JF - Solid State Ionics

IS - 13-14

ER -