ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)

For citation:

Khokhlova M. О., Shubnikova E. V., Bragina O. A., Nemudry A. P., Cherendina O. V. Study of electrode materials based on La0.65Ca0.35Co0.2Fe0.8 – xNixO1 – δ oxides used in solid oxide fuel cells and electrolyzers. Electrochemical Energetics, 2025, vol. 25, iss. 4, pp. 168-172. DOI: 10.18500/1608-4039-2025-25-4-168-172, EDN: CSHVQR

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Full text:
download
(downloads: 15)
Language: 
Russian
Heading: 
Fuel cells
Article type: 
Article
UDC: 
544.228
DOI: 
10.18500/1608-4039-2025-25-4-168-172
EDN: 
CSHVQR

Study of electrode materials based on La0.65Ca0.35Co0.2Fe0.8 – xNixO1 – δ oxides used in solid oxide fuel cells and electrolyzers

Autors: 
Khokhlova Mariya О., Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Shubnikova Elena V. , Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Bragina Olga A., Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Nemudry Alexander P., Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Cherendina Olga V., Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Abstract: 

The effect of iron substitution with nickel cations in La0.65Ca0.35Co0.2Fe0.8−xNixO1−δ oxide on the structural and transport properties of electrode materials for solid oxide fuel cells and electrolyzers was studied in this work. It was shown that Ni3+ cations isomorphically replace Fe3+ /Fe4+ cations in the structure of perovskite. The total conductivity of La0.65Ca0.35Co0.2Fe0.8−xNixO1−δ (x = 0, 0.05) materials was measured in air in the temperature range from 100 to 850°C using the Van der Pauw method. Nickel doping results in improving of the total conductivity without changing the activation energy values.

Key words: 
nonstoichiometric oxides
electrode materials
solid oxide fuel cells
electrolyzers
Acknowledgments: 
Synthesis and the study of the structure of non-stoichiometric oxides were carried out in frames of the State assignment to ISSCM SB RAS No. 1024100800056-9. Investigation of the conductivity of cathode materials was supported by the Russian Science Foundation, project No. 21-79-30051-P.
Reference: 
  1. Tarutin A. P., Filonova E. A., Ricote S., Medvedev D. A., Shao Z. Chemical design of oxygen electrodes for solid oxide electrochemical cells: A guide. Sustain. Energy Technol. Assess., 2023, vol. 57, art. 103185. https://doi.org/10.1016/j.seta.2023.103185
  2. Taylor F. H., Buckeridge J., Catlow C. R. A. Screening divalent metals for A- and B-site dopants in LaFeO3. Chem. Mater., 2017, vol. 29, pp. 8147–8157. https://doi.org/10.1021/acs.chemmater.7b01993
  3. Song J., Ning D., Bouwmeester H. J. M. Influence of alkaline-earth metal substitution on structure, electrical conductivity and oxygen transport properties of perovskite-type oxides La0.6A0.4FeO1−δ (A = Ca, Sr and Ba). Phys. Chem. Chem. Phys., 2020, vol. 22, pp. 11984–11995. https://doi.org/10.1039/D0CP00247J
  4. Feng P., Yang K., Liu X., Zhang J., Li Z. P. A review of advanced SOFCs and SOECs: Materials, innovative synthesis, functional mechanisms, and system integration. eScience, 2025, art. 100460. https://doi.org/10.1016/j.esci.2025.100460
  5. Zong S., Zhao X., Jewell L. L., Zhang Y., Liu X. Advances and challenges with SOEC high temperature co-electrolysis of CO2/H2O: Materials development and technological design. Carbon Capture Sci. Techn., 2024, vol. 12, art. 100234. https://doi.org/10.1016/j.ccst.2024.100234
  6. Bragina O. A., Shubnikova E. V., Arapova M. V., Nemudry A. P. Mo-doped La0.4Sr0.6FeO1−δ hollow fiber membrane for air separation and methane conversion. J. Eur. Ceram. Soc., 2024, vol. 44, iss. 14, art. 116684. https://doi.org/10.1016/j.jeurceramsoc.2024.116684
  7. Sunarso J., Baumann S., Serra J. M., Meulenberg W. A., Liu S., Lin Y. S., Diniz da Costa J. C. Mixed ionic–electronic conducting (MIEC) ceramicbased membranes for oxygen separation. J. Memb. Sci., 2008, vol. 320, pp. 13–41. https://doi.org/10.1016/j.memsci.2008.03.074
Received: 
15.10.2025
Accepted: 
17.11.2025
Published: 
25.12.2025