Application of yttria stabilized zirconia (8YSZ), and NiO precursors for fabrication of composite materials for anode-supported SOFCs

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In this paper, optimization of the manufacturing technology of bilayer supporting anode substrates for planar solid oxide fuel cells using precursors is carried out. The bilayer supporting anode substrates for the second generation planar SOFCs were fabricated by tape casting technique. In order to prepare a composite material for a current-collecting layer containing 60 vol. % NiO and a functional layer containing 40 vol. % NiO (proportions were chosen due to percolation theory), nickel sulfate heptahydrate NiSO4·7H2O was used. The composite mixture of 8YSZ/NiSO4 was calcined at a temperature of 1000°С. Application of NiO precursor led to the obtaining of a strong anode substrate that retains mechanical stability during redox cycling. The fine dispersion of NiO in a thin functional layer led to a high density of three-phase boundaries, which positively affected the electrochemical activity of the anode. Model samples of solid oxide fuel cells were made on the base of the manufactured anode substrates, its electrochemical behavior was investigated using standard electrochemical techniques. The power density at an operating temperature of 750°С was 1 Wt/cm2.

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作者简介

E. Agarkova

Osipyan Institute of Solid State Physics RAS

编辑信件的主要联系方式.
Email: stepanova.ea@issp.ac.ru
俄罗斯联邦, Chernogolovka, 142432

I. Burmistrov

Osipyan Institute of Solid State Physics RAS

Email: stepanova.ea@issp.ac.ru
俄罗斯联邦, Chernogolovka, 142432

D. Yalovenko

Osipyan Institute of Solid State Physics RAS

Email: stepanova.ea@issp.ac.ru
俄罗斯联邦, Chernogolovka, 142432

O. Zadorozhnaya

NEVZ-CERAMICS, JSC

Email: stepanova.ea@issp.ac.ru
俄罗斯联邦, Novosibirsk, 630048

Yu. Nepochatov

NEVZ-CERAMICS, JSC

Email: stepanova.ea@issp.ac.ru
俄罗斯联邦, Novosibirsk, 630048

S. Rabotkin

Institute of high current electronics Siberian Branch, Russian Academy of Science

Email: stepanova.ea@issp.ac.ru
俄罗斯联邦, Tomsk, 634055

A. Solovyev

Institute of high current electronics Siberian Branch, Russian Academy of Science

Email: stepanova.ea@issp.ac.ru
俄罗斯联邦, Tomsk, 634055

S. Bredikhin

Osipyan Institute of Solid State Physics RAS

Email: stepanova.ea@issp.ac.ru
俄罗斯联邦, Chernogolovka, 142432

参考

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  2. Song, J.-H., Park, S.-I., Lee, J.-H., and Kim, H.-S., Fabrication characteristics of an anode-supported thin-film electrolyte fabricated by the tape casting method for IT-SOFC, J. Mater. Proc. Techonol., 2008, vol. 198, no. 1–3, p. 414.
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  8. Han, K.R., Jeong, Y., Lee, H., and Kim, C.-S., Fabrication of NiO/YSZ anode material for SOFC via mixed NiO precursors, Mater. Letters, 2007, vol. 61, iss. 4–5, p. 1242.
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  10. Bredikhin, I., Sinitsyn, V., Aronin, A., Kuritsyna, I., and Bredikhin, S., Microstructural and Electrochemical Study of Charge Transport and Reaction Mechanisms in Ni/YSZ Anode, ECS Transactions, 2007, vol. 7, iss. 1, p. 1541.
  11. Agarkova, E.A., Burmistrov, I.N., Agarkov, D.A., Zadorozhnaya, O.Yu., Shipilova, A.V., Solovyev, A.A., Nepochatov, Yu.K., and Bredikhin, S.I., Bilayered anode supports for planar solid oxide fuel cells: Fabrication and electrochemical performance, Mater. Letters, 2021, vol. 283, p. 128752.
  12. Агаркова, Е.А., Агарков, Д.А., Бурмистров, И.Н., Задорожная, О.Ю., Яловенко, Д.В., Непочатов, Ю.К., Бредихин, С.И. Трехслойные мембраны для планарных твердооксидных топливных элементов электролит-поддерживающей конструкции: характеристики и применение. Электрохимия. 2020. Т. 56. С. 141. [Agarkova, E.A., Agarkov, D.A., Burmistrov, I.N., Zadorozhnaya, O.Yu., Yalovenko, D.V., Nepochatov, Yu.K., and Bredikhin, S.I., Three-layered membranes for planar solid oxide fuel cells of the electrolyte-supported design: characteristics and applications, Russ. J. Electrochem., 2020, vol. 56, p. 132.]
  13. Bredikhin, I., Sinitsin, V., Aronin, A., Kuritsyna, I., and Bredikhin, S., Microstructural and electrochemical study of charge transport and reaction mechanism in Ni/YSZ anode, ESC Transactions, 2007, vol. 7, no. 1, p. 1541.

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2. Fig. 1. Cross-section (a, b) of the current-collecting and (c, d) functional layer of the anode substrate (a, c) before and (b, d) after reduction.

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3. Fig. 2. Load curves of anode substrates before and after reduction.

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4. Fig. 3. Cross-section of 8YSZ/GDC electrolyte and LSCF/GDC-LSCF cathode on the surface of the anode substrate.

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5. Fig. 4. Volt-ampere (a) and power (b) characteristics of SOFC obtained at 700, 750 and 800°C.

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6. Fig. 5. Hodographs of impedance spectra of SOFC (a) and their frequency dependence (b), obtained at 700, 750 and 800°C.

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注意

Публикуется по материалам IX Всероссийской конференции с международным участием “Топливные элементы и энергоустановки на их основе”, Черноголовка, 2022.


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