Densification and Proton Conductivity of La1-xBaxScO3-δ Electrolyte Membranes | Sciact - CRIS-system of Boreskov Institute of Catalysis

Densification and Proton Conductivity of La1-xBaxScO3-δ Electrolyte Membranes Full article

Journal

Membranes
ISSN: 2077-0375

Output data

Year: 2022, Volume: 12, Number: 11, Article number : 1084, Pages count : 18 DOI: 10.3390/membranes12111084

Tags

proton conductivity; lanthanum scandate; sintering additive

Authors

Lesnichyova Alyona ^1,2 , Belyakov Semyon ³ , Stroeva Anna ⁴ , Petrova Sofia ⁵ , Kaichev Vasiliy ⁶ , Kuzmin Anton ^1,4

Affiliations

1	Laboratory of Solid-State Chemistry, Institute of Solid-State Chemistry and Mechanochemistry SB RAS, 630128 Novosibirsk, Russia
2	NANOTECH Centre, Ural Federal University, 620075 Yekaterinburg, Russia
3	Laboratory of Electrochemical Materials Science, Institute of High-Temperature Electrochemistry UB RAS, 620137 Yekaterinburg, Russia
4	Department of Technology of Inorganic Materials and Electrochemical Production, Vyatka State University, 610000 Kirov, Russia
5	Laboratory of High-Entropy Alloys, Institute of Metallurgy UB RAS, 620016 Yekaterinburg, Russia
6	Department of Catalysis Research, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, Russia

Bain La1-xBaxScO3-δ impairs sintering and leads to a decrease in its ceramic density. Two approaches have been studied for obtaining dense ceramics: using a high processing temperature and the introduction of a Co3O4 sintering additive. An addition of only 0.5 wt% of Co3O4 sintering additive, despite the positive sintering effect, causes a noticeable violation of stoichiometry, with partial decomposition of the material. This can lead to the formation of cationic vacancies, which form associates with oxygen vacancies and significantly reduce the oxygen ion and proton conductivity of the materials. There is also a partial substitution of Co for Sc in La1-xBaxScO3-δ, which reduces the stability of protons: it reduces the enthalpy of the hydration reaction, but increases the mobility of protons. Thus, the Co3O4 sintering additive causes a complex of negative effects on the conductivity of La1-xBaxScO3-δ materials. Only high-temperature (1800 °C) processing with protection against Ba loss contributes to the production of dense La1-xBaxScO3-δ ceramics. The chemical composition of such ceramics corresponds well to the specified one, which ensures high water uptake and, consequently, high proton conductivity.

Lesnichyova A. , Belyakov S. , Stroeva A. , Petrova S. , Kaichev V. , Kuzmin A.
Densification and Proton Conductivity of La1-xBaxScO3-δ Electrolyte Membranes
Membranes. 2022. V.12. N11. 1084 :1-18. DOI: 10.3390/membranes12111084 WOS Scopus РИНЦ AN PMID OpenAlex

Submitted:	Oct 3, 2022
Accepted:	Oct 29, 2022
Published online:	Oct 31, 2022
Published print:	Nov 1, 2022

Web of science:	WOS:000884345100001
Scopus:	2-s2.0-85149530129
Elibrary:	50384468
Chemical Abstracts:	2022:3123929
PMID:	36363639
OpenAlex:	W4308119588

DB	Citing
Web of science	5
Scopus	6
Elibrary	5
OpenAlex	7