Enhanced electrochemical performance of partially amorphous La0.6Sr0.4CoO3-δ oxygen electrode materials for low-temperature solid oxide cells operating at 400 °C - Publication - Bridge of Knowledge

Your account

login

Search

Enhanced electrochemical performance of partially amorphous La0.6Sr0.4CoO3-δ oxygen electrode materials for low-temperature solid oxide cells operating at 400 °C

Abstract

This work evaluates partially amorphous La0.6Sr0.4CoO3-δ (LSC) as a potential oxygen electrode for lowtemperature solid oxide cells. LSC was deposited using the spin-coating technique onto Ce0.8Gd0.2O2-δ (CGO) substrates. The optimal oxygen electrode thickness was determined as 500 nm. The electrochemical impedance spectroscopy (EIS) study showed a significant improvement in oxygen reduction/oxidation reaction kinetics when annealing temperatures below 600 ◦C. The lowest value of the polarisation resistance was observed for the sample annealed at 400 ◦C, followed by a temperature of 500 ◦C. EIS measurements at different pO2 content were performed at levels between 0.5 % and 20 %. A comprehensive equivalent circuit analysis was carried out for an explanation of the limiting factors of the catalytic reaction. X-ray absorption fine structure analysis allowed for the identification of differences between crystalline LSC and its partially amorphous form. X-ray absorption nearedge spectroscopy analysis indicated that cobalt adopts a lower oxidation state for the partially amorphous form. Moreover, extended X-ray absorption fine structure analysis indicated the decreased of cobalt oxidation state in partially amorphous LSC. It can be assumed that the increased activity of LSC at temperatures below the crystallization may be due to increased defects and oxygen vacancies in the material.

Citations

  • 3

    CrossRef

  • 0

    Web of Science

  • 2

    Scopus

Authors (12)

Cite as

Full text

download paper
downloaded 24 times
Publication version
Accepted or Published Version
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.apsusc.2024.160620
License
Creative Commons: CC-BY open in new tab

Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
APPLIED SURFACE SCIENCE no. 670,
ISSN: 0169-4332
Language:
English
Publication year:
2024
Bibliographic description:
Lemieszek B., Ilickas M., Jamroz J., Tamulevičienė A., Karczewski J., Błaszczak P., Maximenko A., Abakevičiene B., Małys M., Tamulevičius S., Jasiński P., Molin S.: Enhanced electrochemical performance of partially amorphous La0.6Sr0.4CoO3-δ oxygen electrode materials for low-temperature solid oxide cells operating at 400 °C// APPLIED SURFACE SCIENCE -Vol. 670, (2024), s.160620-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.apsusc.2024.160620
Sources of funding:
Verified by:
Gdańsk University of Technology

seen 54 times

Recommended for you

Developing high-performance oxygen electrodes for intermediate solid oxide cells (SOC) prepared by Ce0.8Gd0.2O2−δ backbone infiltration

2024

Tuning Electrochemical Performance by Microstructural Optimization of the Nanocrystalline Functional Oxygen Electrode Layer for Solid Oxide Cells

2022

Improvement of Oxygen Electrode Performance of Intermediate Temperature Solid Oxide Cells by Spray Pyrolysis Deposited Active Layers

2021

Effect of sintering temperature on electrochemical performance of porous SrTi1-xFexO3-δ (x = 0.35, 0.5, 0.7) oxygen electrodes for solid oxide cells

2020
Meta Tags