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    Rights statement: This is the author’s version of a work that was accepted for publication in Solid State Ionics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solid State Ionics, 345, 2020 DOI: 10.1016/j.ssi.2019.115175

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X-ray photoelectron spectroscopic study of impregnated La0.4Sr0.6Ti0.8Mn0.2O3±d anode material for high temperature-operating solid oxide fuel cell

Research output: Contribution to journalJournal articlepeer-review

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  • S.H. Woo
  • D.S. Park
  • W. Choi
  • H. Kang
  • S.-W. Baek
  • H.-S. Kim
  • T.H. Shin
  • J.-Y. Park
  • H. Schlegl
  • J.H. Kim
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Article number115175
<mark>Journal publication date</mark>29/02/2020
<mark>Journal</mark>Solid State Ionics
Volume345
Number of pages8
Publication StatusPublished
Early online date9/12/19
<mark>Original language</mark>English

Abstract

In this study, the chemical states of a powder type and an impregnated type of the La0.4Sr0.6Ti0.8Mn0.2O3±d (LSTM) oxide system were investigated along with its electrical conductivities in order to apply these materials as alternative anode materials for high temperature-operating Solid Oxide Fuel Cells (HT-SOFCs).

The Ni/8YSZ samples with LSTM impregnated into the pores created by partially removing nickel, Ni/8YSZ (Ni (R)/8YSZ), showed much higher electrical conductivity values than those of unimpregnated Ni/8YSZ (Ni (E)/8YSZ) samples under dry H2 fuel condition.

Reduction of Mn4+ to Mn3+ was observed when LSTM was reduced. Additional reduction properties of Mn2+ from Mn3+ and satellite peaks were found when impregnated LSTM was coated onto a Ni/8YSZ substrate. The reduction of the charge state of Ti contained in LSTM showed the same behavior as the reduction property of Mn. However, a satellite peak identified as metal Ti was only observed when impregnated LSTM was coated on a selectively Ni-removed Ni/8YSZ (Ni (R)/8YSZ) substrate.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Solid State Ionics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Solid State Ionics, 345, 2020 DOI: 10.1016/j.ssi.2019.115175