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

Woo, S.H. and Park, D.S. and Choi, W. and Kang, H. and Baek, S.-W. and Kim, H.-S. and Shin, T.H. and Park, J.-Y. and Schlegl, H. and Kim, J.H. (2020) X-ray photoelectron spectroscopic study of impregnated La0.4Sr0.6Ti0.8Mn0.2O3±d anode material for high temperature-operating solid oxide fuel cell. Solid State Ionics, 345: 115175. ISSN 0167-2738

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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.

Item Type:

Journal Article

Journal or Publication Title:

Solid State Ionics

Additional Information:

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

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2500/2500

Subjects:

?? high temperature-operating solid oxide fuel cell (ht-sofc)anodeelectrical conductivityx-ray photoelectron spectroscopy (xps)binding energy (be)impregnationgeneral materials sciencegeneral chemistrycondensed matter physicsmaterials science(all)chemistry(al ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

139706

Deposited By:

ep_importer_pure

Deposited On:

03 Feb 2020 10:30

Refereed?:

Yes

Published?:

Published