Analysis of LSM-YSZ composite cathode phase connectivity using three-dimensional reconstructions

James R. Wilson; J. Scott Cronin; Sherri Rukes; Anh Duong; Daniel Mumm; Scott Barnett

doi:10.1149/1.3205779

Analysis of LSM-YSZ composite cathode phase connectivity using three-dimensional reconstructions

James R. Wilson, J. Scott Cronin, Sherri Rukes, Anh Duong, Daniel Mumm, Scott Barnett

Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

13 Scopus citations

Abstract

Composite electrodes commonly consist of interconnected pore, electronic-conductor, and ionic-conductor phases that are responsible for the transport of gas phase species, electrons, and oxygen ions, respectively. Attempts to understand how this complicated structure influences electrochemical performance can be facilitated through the acquisition of quantitative microstructural data. In this work, nine different cathode compositions ranging from 30 wt% La_0.8Sr_0.2MnO₃ (LSM) - 70 wt% Y₂O₃-stabilized ZrO₂ (YSZ) to 70 wt% LSM - 30 wt% YSZ were screen printed symmetrically on both sides of YSZ-electrolytes. 3D reconstructions of the cathodes were achieved using focused ion beam (FIB) tomography techniques, and the connectivity of the phases was quantified to determine the electrochemically active triple-phase boundary (EA-TPB) densities. The composition dependence of the polarization resistance, calculated with an electrochemical model that employed the EATPB densities along with measured YSZ tortuosities, was compared with the measured resistances.

Original language	English (US)
Title of host publication	ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages	2283-2292
Number of pages	10
Edition	2 PART 3
DOIs	https://doi.org/10.1149/1.3205779
State	Published - Dec 1 2009
Event	11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria Duration: Oct 4 2009 → Oct 9 2009

Publication series

Name	ECS Transactions
Number	2 PART 3
Volume	25
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
Country	Austria
City	Vienna
Period	10/4/09 → 10/9/09

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1149/1.3205779

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title = "Analysis of LSM-YSZ composite cathode phase connectivity using three-dimensional reconstructions",

abstract = "Composite electrodes commonly consist of interconnected pore, electronic-conductor, and ionic-conductor phases that are responsible for the transport of gas phase species, electrons, and oxygen ions, respectively. Attempts to understand how this complicated structure influences electrochemical performance can be facilitated through the acquisition of quantitative microstructural data. In this work, nine different cathode compositions ranging from 30 wt% La0.8Sr0.2MnO3 (LSM) - 70 wt% Y2O3-stabilized ZrO2 (YSZ) to 70 wt% LSM - 30 wt% YSZ were screen printed symmetrically on both sides of YSZ-electrolytes. 3D reconstructions of the cathodes were achieved using focused ion beam (FIB) tomography techniques, and the connectivity of the phases was quantified to determine the electrochemically active triple-phase boundary (EA-TPB) densities. The composition dependence of the polarization resistance, calculated with an electrochemical model that employed the EATPB densities along with measured YSZ tortuosities, was compared with the measured resistances.",

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Wilson, JR, Cronin, JS, Rukes, S, Duong, A, Mumm, D & Barnett, S 2009, Analysis of LSM-YSZ composite cathode phase connectivity using three-dimensional reconstructions. in ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI). 2 PART 3 edn, ECS Transactions, no. 2 PART 3, vol. 25, pp. 2283-2292, 11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting, Vienna, Austria, 10/4/09. https://doi.org/10.1149/1.3205779

Analysis of LSM-YSZ composite cathode phase connectivity using three-dimensional reconstructions. / Wilson, James R.; Cronin, J. Scott; Rukes, Sherri; Duong, Anh; Mumm, Daniel; Barnett, Scott.

ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI). 2 PART 3. ed. 2009. p. 2283-2292 (ECS Transactions; Vol. 25, No. 2 PART 3).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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