Unusual Lattice Parameters Behavior for La1.9Ca0.1NiO4+δ at the Temperatures below Oxygen Loss | Sciact - CRIS-system of Boreskov Institute of Catalysis

Unusual Lattice Parameters Behavior for La1.9Ca0.1NiO4+δ at the Temperatures below Oxygen Loss Full article

Journal

Crystals
, E-ISSN: 2073-4352

Output data

Year: 2022, Volume: 12, Number: 3, Article number : 344, Pages count : 14 DOI: 10.3390/cryst12030344

Tags

anisotropic XRD peak broadening; HRTEM; (La,Ca)NiO4; IT-SOFC; lanthanum nickelates

Authors

Mishchenko Denis ¹ , Vinokurov Zakhar ¹ , Gerasimov Evgeny ² , Filonova Elena ³ , Shmakov Alexander ¹ , Pikalova Elena ^4,5

Affiliations

1	Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, SB RAS, 630559 Novosibirsk, Russia
2	Federal Research Center Boreskov Institute of Catalysis, SB RAS, 630090 Novosibirsk, Russia
3	Department of Physical and Inorganic Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Yekaterinburg, Russia
4	Laboratory of Solid Oxide Fuel Cells, Institute of High Temperature Electrochemistry, UB RAS, 620137 Yekaterinburg, Russia
5	Department of Environmental Economics, Institute of Economics and Management, Ural Federal University, 620002 Yekaterinburg, Russia

Funding (1)

Ministry of Science and Higher Education of the Russian Federation

ГЗ-2021-2023

In this work, we studied the structural features of La1.9Ca0.1NiO4.11, which is considered a promising cathode material for intermediate temperature solid-oxide fuel cells (IT-SOFC). The effect of different pretreatments on the structural characteristics of the sample was studied using X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) in order to elucidate the origin of a peculiar change of lattice parameters observed earlier during in situ XRD studies. The XRD studies have shown that anisotropic broadening for reflections with a high Miller index l appears after tempering of a quenched (from 1100 °C) sample at 250 °C. This temperature is too low for the release/incorporation of oxygen into the structure but is sufficient for oxygen migration inside the structure. The HRTEM assisted us in revealing differences in the defect structure after different pretreatments. Based on obtained results, the following possible explanation was proposed. Observed additional microstrains and non-oriented planar defects as well as a decrease in the coherent scattering region size in the [00l] direction are caused by the non-homogeneous redistribution of interstitial oxygen in the structure during tempering.

Mishchenko D. , Vinokurov Z. , Gerasimov E. , Filonova E. , Shmakov A. , Pikalova E.
Unusual Lattice Parameters Behavior for La1.9Ca0.1NiO4+δ at the Temperatures below Oxygen Loss
Crystals. 2022. V.12. N3. 344 :1-14. DOI: 10.3390/cryst12030344 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Feb 8, 2022
Accepted:	Feb 28, 2022
Published print:	Mar 2, 2022
Published online:	Mar 2, 2022

Web of science:	WOS:000776868000001
Scopus:	2-s2.0-85125879699
Elibrary:	48189235
Chemical Abstracts:	2022:870715
Chemical Abstracts (print):	178:293207
OpenAlex:	W4214890895

DB	Citing
Scopus	5
Web of science	3
Elibrary	5
OpenAlex	5