Operational Inhomogeneities in La0.9Sr0.1Ga 0.8Mg0.2O3-δ Electrolytes and La 0.8Sr0.2Cr0.82Ru0.18O 3-δ-Ce0.9Gd0.1O2-δ Composite Anodes for Solid Oxide Fuel Cells

Y. Liao; D. M. Bierschenk; S. A. Barnett; Laurence Marks

doi:10.1002/fuce.201000164

Operational Inhomogeneities in La_0.9Sr_0.1Ga _0.8Mg_0.2O_3-δ Electrolytes and La _0.8Sr_0.2Cr_0.82Ru_0.18O _3-δ-Ce_0.9Gd_0.1O_2-δ Composite Anodes for Solid Oxide Fuel Cells

Y. Liao^*, D. M. Bierschenk, S. A. Barnett, Laurence Marks

^*Corresponding author for this work

Materials Science and Engineering

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

5 Scopus citations

Abstract

The electrolyte/anode interface in solid oxide fuel cells with La _0.9Sr_0.1Ga_0.8Mg_0.2O _3-δ electrolytes and composite anodes containing La _0.8Sr_0.2Cr_0.82Ru_0.18O _3-δ and Ce_0.9Gd_0.1O_2-δ (GDC) was studied using transmission electron microscope Z-contrast imaging and energy dispersive X-ray spectroscopy. The anode/electrolyte interface of an operated cell had numerous defective regions in the electrolyte, immediately adjacent to anode GDC particles. These areas had a different chemical composition than other electrolyte regions and were crystallographically inhomogeneous. These regions were not observed in a cell reduced in hydrogen that was not operated, suggesting that they were the result of combined electrical and chemical potential gradients present during cell operation. Ru nanoparticles were observed on the chromite surfaces of the operated.

Original language	English (US)
Pages (from-to)	635-641
Number of pages	7
Journal	Fuel Cells
Volume	11
Issue number	5
DOIs	https://doi.org/10.1002/fuce.201000164
State	Published - Oct 2011

Keywords

Catalyst
Chromite Anode
Degradation
Interface
LSGM Electrolyte
Microstructure
Nano
Ruthenium
SOFC
TEM

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology

UN SDGs

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

Access to Document

10.1002/fuce.201000164

Cite this

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title = "Operational Inhomogeneities in La0.9Sr0.1Ga 0.8Mg0.2O3-δ Electrolytes and La 0.8Sr0.2Cr0.82Ru0.18O 3-δ-Ce0.9Gd0.1O2-δ Composite Anodes for Solid Oxide Fuel Cells",

abstract = "The electrolyte/anode interface in solid oxide fuel cells with La 0.9Sr0.1Ga0.8Mg0.2O 3-δ electrolytes and composite anodes containing La 0.8Sr0.2Cr0.82Ru0.18O 3-δ and Ce0.9Gd0.1O2-δ (GDC) was studied using transmission electron microscope Z-contrast imaging and energy dispersive X-ray spectroscopy. The anode/electrolyte interface of an operated cell had numerous defective regions in the electrolyte, immediately adjacent to anode GDC particles. These areas had a different chemical composition than other electrolyte regions and were crystallographically inhomogeneous. These regions were not observed in a cell reduced in hydrogen that was not operated, suggesting that they were the result of combined electrical and chemical potential gradients present during cell operation. Ru nanoparticles were observed on the chromite surfaces of the operated.",

keywords = "Catalyst, Chromite Anode, Degradation, Interface, LSGM Electrolyte, Microstructure, Nano, Ruthenium, SOFC, TEM",

author = "Y. Liao and Bierschenk, {D. M.} and Barnett, {S. A.} and Laurence Marks",

year = "2011",

month = oct,

doi = "10.1002/fuce.201000164",

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volume = "11",

pages = "635--641",

journal = "Fuel Cells",

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AU - Liao, Y.

AU - Bierschenk, D. M.

AU - Barnett, S. A.

AU - Marks, Laurence

PY - 2011/10

Y1 - 2011/10

N2 - The electrolyte/anode interface in solid oxide fuel cells with La 0.9Sr0.1Ga0.8Mg0.2O 3-δ electrolytes and composite anodes containing La 0.8Sr0.2Cr0.82Ru0.18O 3-δ and Ce0.9Gd0.1O2-δ (GDC) was studied using transmission electron microscope Z-contrast imaging and energy dispersive X-ray spectroscopy. The anode/electrolyte interface of an operated cell had numerous defective regions in the electrolyte, immediately adjacent to anode GDC particles. These areas had a different chemical composition than other electrolyte regions and were crystallographically inhomogeneous. These regions were not observed in a cell reduced in hydrogen that was not operated, suggesting that they were the result of combined electrical and chemical potential gradients present during cell operation. Ru nanoparticles were observed on the chromite surfaces of the operated.

AB - The electrolyte/anode interface in solid oxide fuel cells with La 0.9Sr0.1Ga0.8Mg0.2O 3-δ electrolytes and composite anodes containing La 0.8Sr0.2Cr0.82Ru0.18O 3-δ and Ce0.9Gd0.1O2-δ (GDC) was studied using transmission electron microscope Z-contrast imaging and energy dispersive X-ray spectroscopy. The anode/electrolyte interface of an operated cell had numerous defective regions in the electrolyte, immediately adjacent to anode GDC particles. These areas had a different chemical composition than other electrolyte regions and were crystallographically inhomogeneous. These regions were not observed in a cell reduced in hydrogen that was not operated, suggesting that they were the result of combined electrical and chemical potential gradients present during cell operation. Ru nanoparticles were observed on the chromite surfaces of the operated.

KW - Catalyst

KW - Chromite Anode

KW - Degradation

KW - Interface

KW - LSGM Electrolyte

KW - Microstructure

KW - Nano

KW - Ruthenium

KW - SOFC

KW - TEM

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