Characterization of Nd0.6Sr0.4Co1-yFe yO3-δ (0 ≤ y ≤ 0.5) cathode materials for intermediate temperature solid oxide fuel cells

K. T. Lee; A. Manthiram

doi:10.1016/j.ssi.2005.05.002

Characterization of Nd_0.6Sr_0.4Co_1-yFe _yO_3-δ (0 ≤ y ≤ 0.5) cathode materials for intermediate temperature solid oxide fuel cells

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

60 Scopus citations

Abstract

The crystal chemistry, electrical conductivity, thermal expansion behavior, chemical compatibility, and electrochemical performance of perovskite Nd _0.6Sr_0.4Co_1-yFe_yO _3-δ (0 ≤ y ≤ 0.5) oxides as cathode materials for intermediate temperature solid oxide fuel cells have been investigated. The samples crystallize in an orthorhombic structure, and the lattice parameters and cell volume increase with increasing Fe content y. The degree of oxygen loss on heating to higher temperatures and the thermal expansion coefficient (TEC) decrease with increasing y due to a stronger Fe-O bond. The electrical conductivity decreases with y, and the system exhibits a metal to semiconductor transition at around y = 0.2. The electrocatalytic activity and power density measured with single cells decrease with increasing y due to a decrease in electrical conductivity and oxide ion vacancy concentration.

Original language	English
Pages (from-to)	1521-1527
Number of pages	7
Journal	Solid State Ionics
Volume	176
Issue number	17-18
DOIs	https://doi.org/10.1016/j.ssi.2005.05.002
State	Published - 2005.05.31

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Crystal chemistry
Electrical conductivity
Electrochemical performance
Solid oxide fuel cells
Thermal expansion

Access to Document

10.1016/j.ssi.2005.05.002

Cite this

@article{a742d071bf88495e81e7d7cf41b94356,

title = "Characterization of Nd0.6Sr0.4Co1-yFe yO3-δ (0 ≤ y ≤ 0.5) cathode materials for intermediate temperature solid oxide fuel cells",

abstract = "The crystal chemistry, electrical conductivity, thermal expansion behavior, chemical compatibility, and electrochemical performance of perovskite Nd 0.6Sr0.4Co1-yFeyO 3-δ (0 ≤ y ≤ 0.5) oxides as cathode materials for intermediate temperature solid oxide fuel cells have been investigated. The samples crystallize in an orthorhombic structure, and the lattice parameters and cell volume increase with increasing Fe content y. The degree of oxygen loss on heating to higher temperatures and the thermal expansion coefficient (TEC) decrease with increasing y due to a stronger Fe-O bond. The electrical conductivity decreases with y, and the system exhibits a metal to semiconductor transition at around y = 0.2. The electrocatalytic activity and power density measured with single cells decrease with increasing y due to a decrease in electrical conductivity and oxide ion vacancy concentration.",

keywords = "Crystal chemistry, Electrical conductivity, Electrochemical performance, Solid oxide fuel cells, Thermal expansion",

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

year = "2005",

month = may,

day = "31",

doi = "10.1016/j.ssi.2005.05.002",

language = "English",

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journal = "Solid State Ionics",

issn = "0167-2738",

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TY - JOUR

T1 - Characterization of Nd0.6Sr0.4Co1-yFe yO3-δ (0 ≤ y ≤ 0.5) cathode materials for intermediate temperature solid oxide fuel cells

AU - Lee, K. T.

AU - Manthiram, A.

PY - 2005/5/31

Y1 - 2005/5/31

N2 - The crystal chemistry, electrical conductivity, thermal expansion behavior, chemical compatibility, and electrochemical performance of perovskite Nd 0.6Sr0.4Co1-yFeyO 3-δ (0 ≤ y ≤ 0.5) oxides as cathode materials for intermediate temperature solid oxide fuel cells have been investigated. The samples crystallize in an orthorhombic structure, and the lattice parameters and cell volume increase with increasing Fe content y. The degree of oxygen loss on heating to higher temperatures and the thermal expansion coefficient (TEC) decrease with increasing y due to a stronger Fe-O bond. The electrical conductivity decreases with y, and the system exhibits a metal to semiconductor transition at around y = 0.2. The electrocatalytic activity and power density measured with single cells decrease with increasing y due to a decrease in electrical conductivity and oxide ion vacancy concentration.

AB - The crystal chemistry, electrical conductivity, thermal expansion behavior, chemical compatibility, and electrochemical performance of perovskite Nd 0.6Sr0.4Co1-yFeyO 3-δ (0 ≤ y ≤ 0.5) oxides as cathode materials for intermediate temperature solid oxide fuel cells have been investigated. The samples crystallize in an orthorhombic structure, and the lattice parameters and cell volume increase with increasing Fe content y. The degree of oxygen loss on heating to higher temperatures and the thermal expansion coefficient (TEC) decrease with increasing y due to a stronger Fe-O bond. The electrical conductivity decreases with y, and the system exhibits a metal to semiconductor transition at around y = 0.2. The electrocatalytic activity and power density measured with single cells decrease with increasing y due to a decrease in electrical conductivity and oxide ion vacancy concentration.

KW - Crystal chemistry

KW - Electrical conductivity

KW - Electrochemical performance

KW - Solid oxide fuel cells

KW - Thermal expansion

UR - https://www.scopus.com/pages/publications/20644468821

U2 - 10.1016/j.ssi.2005.05.002

DO - 10.1016/j.ssi.2005.05.002

M3 - Journal article

AN - SCOPUS:20644468821

SN - 0167-2738

VL - 176

SP - 1521

EP - 1527

JO - Solid State Ionics

JF - Solid State Ionics

IS - 17-18

ER -