Journals →  Chernye Metally →  2025 →  #5 →  Back

Coatings Application and Corrosion Protection
ArticleName Study of the evolution of surface morphology and elemental composition of coatings based on cobalt-manganese spinel of current collectors of solid oxide fuel cells in an oxidizing environment
DOI 10.17580/chm.2025.05.13
ArticleAuthor A. V. Khramenkova, O. A. Finaeva, N. V. Demeneva, E. A. Yatsenko
ArticleAuthorData

Platov South-Russian State Polytechnic University (NPI), Novocherkassk, Russia
A. V. Khramenkova, Cand. Eng., Associate Prof., Dept. of General Chemistry and Technology of Silicates, e-mail: anna.vl7@yandex.ru
O. A. Finaeva, Engineer, Dept. of General Chemistry and Technology of Silicates, e-mail: olya.finayeva.01@bk.ru

E. A. Yatsenko, Dr. Eng., Prof., Head of the Dept. of General Chemistry and Technology of Silicates, e-mail: e_yatsenko@mail.ru


Institute of Solid State Physics of the Russian Academy of Sciences (ISSP RAS), Chernogolovka, Russia
N. V. Demeneva, Cand. Phys.-Math., Researcher, e-mail: ladyn@issp.ac.ru

Abstract

The paper presents data on the performance of physical and chemical properties of Co-Mn spinel-based coatings during area-specific resistance measurements in a model solid oxide fuel cell. Synthesis of coatings was carried out using the method of non-stationary electrolysis. When comparing microphotographs of coatings before and after high-temperature oxidation, it can be seen that crystallisation of coatings and enlargement of their constituent fragments during oxidation occur. Thus according to the data of X-ray microanalysis it is established that in the process of oxidation there is an increase in concentration of chromium, manganese and iron that can be connected with diffusion of these elements from steel on a surface of a coating. From the XRD data, it can be seen that cobalt and manganese are distributed evenly over the coating surface, while chromium, which is part of the substrate, is concentrated in the cracks of the coating. From the X-ray diffraction data, it can be seen that the coating is in an X-ray amorphous state. It should be noted, however, that oxidation in air for 1000 h at 850 °C results in the coating becoming more crystallized. Thus, in addition to the Co-Mn spinel peak, Fe-Cr, Cr2O3 and Fe3O4 phases are observed. The study of the change in the weight gain of the coated and pure steel samples in the cyclic regime of heating-holding-cooling showed the following. Oxidation of uncoated Crofer 22 APU steel grows from the first hours of oxidation according to a parabolic law: the rate is determined by the thermodiffusion of chromium through the oxide growing on the steel surface to the surface. The coated samples show a decrease in mass in the first 10 hours, and then the weight gain also grows according to the parabolic law. The values of the calculated rate constants show the effectiveness of the developed coatings.
The study was supported by a grant from the Russian Science Foundation No. 24-23-00113, https://rscf.ru/project/24-23-00113/.

keywords Solid oxide fuel cells, interconnects, protective coatings, Co-Mn spinel, non-stationary electrolysis, high-temperature oxidation, parabolic rate constant of oxidation
References

1. Kalinina E. G., Pikalova E. Yu. New trends in the development of the electrophoretic deposition method in solid oxide fuel cell technology: theoretical approaches, experimental solutions and development prospects. Uspekhi khimii. 2019. Vol. 88. No. 12. pp. 1179–1219.
2. Chun O., Jamshaid F., Khan M. Z., Gohar O. et al. Advances in low-temperature solid oxide fuel cells: An explanatory review. Journal of Power Sources. 2024. Vol. 610. 234719.
3. Savchuk V., Megel Sh., Girdauskayte E., Trofimenko N. et al. Effect of protective coatings on the efficiency of solid oxide fuel cells. Elektrokhimiya. 2011. Vol. 47. No. 5. pp. 558–567.
4. Mao J., Wang E., Wang H., Ouyang M. et al. Progress in metal corrosion mechanism and protective coating technology for interconnect and metal support of solid oxide cells. Renewable and Sustainable Energy Reviews. 2023. Vol. 185. 113597.
5. Zhou L., Mason J. H., Li W., Liu X. Comprehensive review of chromium deposition and poisoning of solid oxide fuel cells (SOFCs) cathode materials. Renewable and Sustainable Energy Reviews. 2020. Vol. 134. 110320.
6. Demeneva N. V., Bredikhin S. I. Formation of oxide films and diffusion processes in the surface layers of current collectors of solid oxide fuel cells. Elektrokhimiya. 2014. Vol. 50. No. 8. pp. 808–813.
7. Ananyev M. V., Solodyankin A. A., Eremin V. A., Farlenkov A. S. et al. Protective coatings of La – Mn – Cu – O on 08Kh17Т steel interconnector for solid oxide fuel cells obtained by electrocrystallization from non-aqueous electrolyte solutions. Izvestiya vuzov. Tsvetnaya me tallurgiya. 2017. No. 6. pp. 70–80.
8. Bushuev A. N., Tolstobrov I. V., Elkin O. V., Saetova N. S. et al. Development of interconnectors for solid oxide fuel cells resistant to high-temperature corrosion based on domestic materials. Uspekhi v khimii i khimicheskoy tekhnologii. 2023. Vol. 37. No. 2. pp. 25–28.
9. Yu Y. T., Lu Y., Guan C. Z., Wang J. Q. et al. Evaluation of the reactive-sintered (Mn, Co)3O4 spinel layer for SOFC cathode-side contact application. International Journal of Hydrogen Energy. 2022. Vol. 47, Iss. 87. pp. 36964–36971.
10. Wang B., Li K., Liu J., Yang T. et al. Fabricating a MnCo coating to improve oxidation resistance and electrical conductivity of Crofer22H alloy as SOFC interconnect. International Journal of Hydrogen Energy. 2024. Vol. 50. pp. 1503–1514.
11. Li F., Zhang P., Zhao Y., Yang D. et al. The preparation and properties of Mn – Co – O spinel coating for SOFC metallic interconnect. International Journal of Hydrogen Energy. 2023. Vol. 48, Iss. 42. pp. 16048–16056.
12. Chanson R., Bouvier M., Miserque F., Rouillard F. et al. Influence of cobalt and cobalt–manganese oxide coating thickness deposited by DLI-MOCVD as a barrier against Cr diffusion for SOC interconnect. High Temperature Corrosion of Materials. 2024. Vol. 101. pp. 1467–1478.
13. Khramenkova A., Ariskina D., Yatsenko E. Catalytic properties and thermal stability of hybrid materials on the steel surface obtained by non-stationary electrolysis. Chernye Metally. 2020. No. 10. pp. 39–44.

Language of full-text russian
Full content Buy
Back