Oxygen transport and surface exchange properties of Sr0.5Sm 0.5CoO3-δ

Ted C. Yeh; Jules L. Routbort; Thomas O. Mason

doi:10.1016/j.ssi.2012.11.024

Oxygen transport and surface exchange properties of Sr_0.5Sm _0.5CoO_3-δ

Ted C. Yeh, Jules L. Routbort, Thomas O. Mason^*

^*Corresponding author for this work

Materials Science and Engineering

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

22 Scopus citations

Abstract

Oxygen tracer diffusion (D^â) and chemical diffusion (DËœ) were measured in dense Sr_0.5Sm_0.5CoO _{3 - δ} (SSC) ceramics by Isotope Exchange Depth Profiling/Secondary Ion Mass Spectrometry (IEDP/SIMS) and electrical conductivity relaxation (ECR) over the temperature ranges of ∼100-200 C and 400-600 C, respectively. In addition, the surface exchange coefficients were determined over the same temperature ranges. The transport properties and exchange kinetics of SSC are comparable to or better than those of other solid oxide fuel cell cathode candidates in the literature. The ionic conductivity of SSC was calculated using the Nernst-Einstein equation, and is comparable to that of leading solid oxide electrolytes at intermediate temperatures.

Original language	English (US)
Pages (from-to)	138-143
Number of pages	6
Journal	Solid State Ionics
Volume	232
DOIs	https://doi.org/10.1016/j.ssi.2012.11.024
State	Published - 2013

Keywords

Cathode
Chemical diffusivity
Solid oxide fuel cell
SrSmCoO
Surface exchange coefficient
Tracer diffusivity

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.ssi.2012.11.024

Cite this

@article{1d8d56eed89f4faa8f795d6fc911d9f0,

title = "Oxygen transport and surface exchange properties of Sr0.5Sm 0.5CoO3-δ",

abstract = "Oxygen tracer diffusion (D{\^a}) and chemical diffusion (D{\"E}{\oe}) were measured in dense Sr0.5Sm0.5CoO 3 - δ (SSC) ceramics by Isotope Exchange Depth Profiling/Secondary Ion Mass Spectrometry (IEDP/SIMS) and electrical conductivity relaxation (ECR) over the temperature ranges of ∼100-200 C and 400-600 C, respectively. In addition, the surface exchange coefficients were determined over the same temperature ranges. The transport properties and exchange kinetics of SSC are comparable to or better than those of other solid oxide fuel cell cathode candidates in the literature. The ionic conductivity of SSC was calculated using the Nernst-Einstein equation, and is comparable to that of leading solid oxide electrolytes at intermediate temperatures.",

keywords = "Cathode, Chemical diffusivity, Solid oxide fuel cell, SrSmCoO, Surface exchange coefficient, Tracer diffusivity",

author = "Yeh, {Ted C.} and Routbort, {Jules L.} and Mason, {Thomas O.}",

note = "Funding Information: The authors acknowledge support from the U.S. Department of Energy under contract no. DE-FG02-05ER46255/04 . This work also made use of the J.B. Cohen X-ray Diffraction Facility supported by the MRSEC program of the National Science Foundation (grant no. DMR-1121262 ) as well as the Keck-II Interdisciplinary Surface Science facility supported by the Institute for Nanotechnology's NSF-sponsored Nanoscale Science & Engineering Center (NSEC) at Northwestern University ( EEC-0118025/003 ). Helpful discussions with the group of Scott Barnett are gratefully acknowledged. This paper is dedicated to co-author Jules Routbort, who passed away during the final stages of the research.",

year = "2013",

doi = "10.1016/j.ssi.2012.11.024",

language = "English (US)",

volume = "232",

pages = "138--143",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

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AU - Yeh, Ted C.

AU - Routbort, Jules L.

AU - Mason, Thomas O.

N1 - Funding Information: The authors acknowledge support from the U.S. Department of Energy under contract no. DE-FG02-05ER46255/04 . This work also made use of the J.B. Cohen X-ray Diffraction Facility supported by the MRSEC program of the National Science Foundation (grant no. DMR-1121262 ) as well as the Keck-II Interdisciplinary Surface Science facility supported by the Institute for Nanotechnology's NSF-sponsored Nanoscale Science & Engineering Center (NSEC) at Northwestern University ( EEC-0118025/003 ). Helpful discussions with the group of Scott Barnett are gratefully acknowledged. This paper is dedicated to co-author Jules Routbort, who passed away during the final stages of the research.

PY - 2013

Y1 - 2013

N2 - Oxygen tracer diffusion (Dâ) and chemical diffusion (DËœ) were measured in dense Sr0.5Sm0.5CoO 3 - δ (SSC) ceramics by Isotope Exchange Depth Profiling/Secondary Ion Mass Spectrometry (IEDP/SIMS) and electrical conductivity relaxation (ECR) over the temperature ranges of ∼100-200 C and 400-600 C, respectively. In addition, the surface exchange coefficients were determined over the same temperature ranges. The transport properties and exchange kinetics of SSC are comparable to or better than those of other solid oxide fuel cell cathode candidates in the literature. The ionic conductivity of SSC was calculated using the Nernst-Einstein equation, and is comparable to that of leading solid oxide electrolytes at intermediate temperatures.

AB - Oxygen tracer diffusion (Dâ) and chemical diffusion (DËœ) were measured in dense Sr0.5Sm0.5CoO 3 - δ (SSC) ceramics by Isotope Exchange Depth Profiling/Secondary Ion Mass Spectrometry (IEDP/SIMS) and electrical conductivity relaxation (ECR) over the temperature ranges of ∼100-200 C and 400-600 C, respectively. In addition, the surface exchange coefficients were determined over the same temperature ranges. The transport properties and exchange kinetics of SSC are comparable to or better than those of other solid oxide fuel cell cathode candidates in the literature. The ionic conductivity of SSC was calculated using the Nernst-Einstein equation, and is comparable to that of leading solid oxide electrolytes at intermediate temperatures.

KW - Cathode

KW - Chemical diffusivity

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KW - SrSmCoO

KW - Surface exchange coefficient

KW - Tracer diffusivity

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