Surface segregation and inter-diffusion of cations and impurities in microelectrodes for solid oxide fuel cells and electrolysers

H. Téllez, J. Druce, Y. Shi, M. Kubicek, Neil J. Simrick, J. L.M. Rupp, T. Ishihara, J. Kilner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The surface segregation and inter-diffusion of cations and impurities in La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) electrode structures micro-patterned on a Zr0.84Y0.16O1.92 (YSZ) single crystal was investigated by high-resolution Time-of-Flight Secondary Ion Mass Spectrometry and Low-Energy Ion Scattering. The outermost and near surface of the microelectrodes showed significant changes after patterning and electrochemical testing of the cell. As occurring in bulk LSCF ceramics, Sr segregation towards the surface is observed after annealing at 500°C. Furthermore, the electrode showed that impurities (i.e. Na, Si and Ca) originating from the YSZ electrolyte bulk migrate actively to the LSCF electrode during electrochemical testing. The impurity migration has implications for oxygen surface exchange at the cathodeelectrolyte and air interface for solid oxide fuel cells: the electrolyte YSZ surface becomes cleaner whereas the segregation of Sr to the LSCF outer surface seems to be suppressed with respect to the operation time of the device.

Original languageEnglish
Title of host publicationSolid-Gas Electrochemical Interfaces � SGEI 1
EditorsE. Ivers-Tiffee, M. B. Mogensen, S. B. Adler, T. Kawada
PublisherElectrochemical Society Inc.
Pages69-77
Number of pages9
Edition2
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 2015
Event1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting - Chicago, United States
Duration: May 24 2015May 28 2015

Publication series

NameECS Transactions
Number2
Volume66
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting
CountryUnited States
CityChicago
Period5/24/155/28/15

Fingerprint

Surface segregation
Microelectrodes
Solid oxide fuel cells (SOFC)
Positive ions
Impurities
Electrochemical electrodes
Electrolytes
Electrodes
Testing
Secondary ion mass spectrometry
Single crystals
Scattering
Annealing
Oxygen
Ions
Air

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Téllez, H., Druce, J., Shi, Y., Kubicek, M., Simrick, N. J., Rupp, J. L. M., ... Kilner, J. (2015). Surface segregation and inter-diffusion of cations and impurities in microelectrodes for solid oxide fuel cells and electrolysers. In E. Ivers-Tiffee, M. B. Mogensen, S. B. Adler, & T. Kawada (Eds.), Solid-Gas Electrochemical Interfaces � SGEI 1 (2 ed., pp. 69-77). (ECS Transactions; Vol. 66, No. 2). Electrochemical Society Inc.. https://doi.org/10.1149/06602.0069ecst

Surface segregation and inter-diffusion of cations and impurities in microelectrodes for solid oxide fuel cells and electrolysers. / Téllez, H.; Druce, J.; Shi, Y.; Kubicek, M.; Simrick, Neil J.; Rupp, J. L.M.; Ishihara, T.; Kilner, J.

Solid-Gas Electrochemical Interfaces � SGEI 1. ed. / E. Ivers-Tiffee; M. B. Mogensen; S. B. Adler; T. Kawada. 2. ed. Electrochemical Society Inc., 2015. p. 69-77 (ECS Transactions; Vol. 66, No. 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Téllez, H, Druce, J, Shi, Y, Kubicek, M, Simrick, NJ, Rupp, JLM, Ishihara, T & Kilner, J 2015, Surface segregation and inter-diffusion of cations and impurities in microelectrodes for solid oxide fuel cells and electrolysers. in E Ivers-Tiffee, MB Mogensen, SB Adler & T Kawada (eds), Solid-Gas Electrochemical Interfaces � SGEI 1. 2 edn, ECS Transactions, no. 2, vol. 66, Electrochemical Society Inc., pp. 69-77, 1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting, Chicago, United States, 5/24/15. https://doi.org/10.1149/06602.0069ecst
Téllez H, Druce J, Shi Y, Kubicek M, Simrick NJ, Rupp JLM et al. Surface segregation and inter-diffusion of cations and impurities in microelectrodes for solid oxide fuel cells and electrolysers. In Ivers-Tiffee E, Mogensen MB, Adler SB, Kawada T, editors, Solid-Gas Electrochemical Interfaces � SGEI 1. 2 ed. Electrochemical Society Inc. 2015. p. 69-77. (ECS Transactions; 2). https://doi.org/10.1149/06602.0069ecst
Téllez, H. ; Druce, J. ; Shi, Y. ; Kubicek, M. ; Simrick, Neil J. ; Rupp, J. L.M. ; Ishihara, T. ; Kilner, J. / Surface segregation and inter-diffusion of cations and impurities in microelectrodes for solid oxide fuel cells and electrolysers. Solid-Gas Electrochemical Interfaces � SGEI 1. editor / E. Ivers-Tiffee ; M. B. Mogensen ; S. B. Adler ; T. Kawada. 2. ed. Electrochemical Society Inc., 2015. pp. 69-77 (ECS Transactions; 2).
@inproceedings{b4bea0d3a61d44d18d33c1bdb16716a5,
title = "Surface segregation and inter-diffusion of cations and impurities in microelectrodes for solid oxide fuel cells and electrolysers",
abstract = "The surface segregation and inter-diffusion of cations and impurities in La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) electrode structures micro-patterned on a Zr0.84Y0.16O1.92 (YSZ) single crystal was investigated by high-resolution Time-of-Flight Secondary Ion Mass Spectrometry and Low-Energy Ion Scattering. The outermost and near surface of the microelectrodes showed significant changes after patterning and electrochemical testing of the cell. As occurring in bulk LSCF ceramics, Sr segregation towards the surface is observed after annealing at 500°C. Furthermore, the electrode showed that impurities (i.e. Na, Si and Ca) originating from the YSZ electrolyte bulk migrate actively to the LSCF electrode during electrochemical testing. The impurity migration has implications for oxygen surface exchange at the cathodeelectrolyte and air interface for solid oxide fuel cells: the electrolyte YSZ surface becomes cleaner whereas the segregation of Sr to the LSCF outer surface seems to be suppressed with respect to the operation time of the device.",
author = "H. T{\'e}llez and J. Druce and Y. Shi and M. Kubicek and Simrick, {Neil J.} and Rupp, {J. L.M.} and T. Ishihara and J. Kilner",
year = "2015",
month = "1",
day = "1",
doi = "10.1149/06602.0069ecst",
language = "English",
series = "ECS Transactions",
publisher = "Electrochemical Society Inc.",
number = "2",
pages = "69--77",
editor = "E. Ivers-Tiffee and Mogensen, {M. B.} and Adler, {S. B.} and T. Kawada",
booktitle = "Solid-Gas Electrochemical Interfaces � SGEI 1",
edition = "2",

}

TY - GEN

T1 - Surface segregation and inter-diffusion of cations and impurities in microelectrodes for solid oxide fuel cells and electrolysers

AU - Téllez, H.

AU - Druce, J.

AU - Shi, Y.

AU - Kubicek, M.

AU - Simrick, Neil J.

AU - Rupp, J. L.M.

AU - Ishihara, T.

AU - Kilner, J.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - The surface segregation and inter-diffusion of cations and impurities in La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) electrode structures micro-patterned on a Zr0.84Y0.16O1.92 (YSZ) single crystal was investigated by high-resolution Time-of-Flight Secondary Ion Mass Spectrometry and Low-Energy Ion Scattering. The outermost and near surface of the microelectrodes showed significant changes after patterning and electrochemical testing of the cell. As occurring in bulk LSCF ceramics, Sr segregation towards the surface is observed after annealing at 500°C. Furthermore, the electrode showed that impurities (i.e. Na, Si and Ca) originating from the YSZ electrolyte bulk migrate actively to the LSCF electrode during electrochemical testing. The impurity migration has implications for oxygen surface exchange at the cathodeelectrolyte and air interface for solid oxide fuel cells: the electrolyte YSZ surface becomes cleaner whereas the segregation of Sr to the LSCF outer surface seems to be suppressed with respect to the operation time of the device.

AB - The surface segregation and inter-diffusion of cations and impurities in La0.6Sr0.4Co0.8Fe0.2O3-δ (LSCF) electrode structures micro-patterned on a Zr0.84Y0.16O1.92 (YSZ) single crystal was investigated by high-resolution Time-of-Flight Secondary Ion Mass Spectrometry and Low-Energy Ion Scattering. The outermost and near surface of the microelectrodes showed significant changes after patterning and electrochemical testing of the cell. As occurring in bulk LSCF ceramics, Sr segregation towards the surface is observed after annealing at 500°C. Furthermore, the electrode showed that impurities (i.e. Na, Si and Ca) originating from the YSZ electrolyte bulk migrate actively to the LSCF electrode during electrochemical testing. The impurity migration has implications for oxygen surface exchange at the cathodeelectrolyte and air interface for solid oxide fuel cells: the electrolyte YSZ surface becomes cleaner whereas the segregation of Sr to the LSCF outer surface seems to be suppressed with respect to the operation time of the device.

UR - http://www.scopus.com/inward/record.url?scp=84931095047&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84931095047&partnerID=8YFLogxK

U2 - 10.1149/06602.0069ecst

DO - 10.1149/06602.0069ecst

M3 - Conference contribution

AN - SCOPUS:84931095047

T3 - ECS Transactions

SP - 69

EP - 77

BT - Solid-Gas Electrochemical Interfaces � SGEI 1

A2 - Ivers-Tiffee, E.

A2 - Mogensen, M. B.

A2 - Adler, S. B.

A2 - Kawada, T.

PB - Electrochemical Society Inc.

ER -