Registration Number
0224U033149,
(0123U102769)
, R & D reports
Title
Development of solid oxide fuel cell electrolyte with improved operational properties
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Дослідження структури та електричних властивостей структурованого електроліту керамічної паливної комірки на основі оксиду цирконію
Head
Brodnikovskyi Yehor M., Кандидат технічних наук
Registration Date
19-12-2024
Organization
Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine
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- development of an approach of the structure formation and phase composition of zirconia-based electrolyte for solid oxide fuel cells (SOFC) and find out its influence on the electrolyte functional properties.
- find out the regularity of formation of the zirconia-based electrolyte structure depending on the composition of the stabilizing additive (Sc2O3, Y2O3, CeO2) and their combinations, and to study the influence of the formed structure features on the electrical properties and mechanical behavior of the electrolyte materials. Identifying the structure-property relationship for the developed electrolyte materials will allow determining its optimal composition and manufacturing modes that will provide the required properties.
- development of SOFC electrolyte material with higher electrical conductivity compared to the zirconia stabilized with 8 mol. % yttria (8YSZ), which is currently the traditional and most widely used electrolyte material in production of the commercial combined heat and power systems based on SOFC.
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The object of the study is the regularities of structure formation and its influence on the electrical conductivity and mechanical behavior of ceramic samples made from a mixture of 10Sc1CeSZ and 8YSZ powders with different ratios: 33:77, 40:60, 50:50, 35:65, 25:75, 10:90, respectively.
The aim of the work is to develop a structured electrolyte for a ceramic fuel cell based on zirconium oxide and study its properties.
Research methods: hydrostatic weighing, biaxial bending, x-ray diffraction phase analysis, scanning electron microscopy.
The regularities of the formation of the structure and mechanical properties of electrolytic structured samples 10Sc1CeSZ-8YSZ (33-,40-,50-,65-,75-,90-%) and samples 10Sc1CeSZ and 8YSZ depending on the initial composition of the powder mixtures have been established. It has been established that the decrease in the porosity of the composites 10Sc1CeSZ-8YSZ with an increase in the content of 8YSZ in them correlates well with an increase in their strength. It should be noted that the composition with 50 wt. % 8YSZ demonstrates the maximum strength value at the level of 208 MPa among the studied composite samples.
Studies of the structure of the samples 10Sc1CeSZ-8YSZ have shown that all the studied samples have a cubic phase of zirconium oxide. It has been established that an increase in the content of 8YSZ in the composites leads to a decrease in their average grain size. Thus, when calculating the linear grain size, the following values were obtained: 1.7, 1.5, 1.2, and 1.2 μm for samples with a content of 33, 50, and 75 wt. % 8YSZ, and pure 8YSZ, respectively.
Product Description
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Brodnikovskyi Yehor M.
Brodnikovskyi Dmytro M.
Vasiliev Oleksandr O.
Vasylev Oleksandr D.
Holovkova Maryna Ye,
Horda Ruslana V,
Kovalenko Leonid L,
Lysunenko Natalia O.
Molchanovska Halyna M.
Okun Ihor Yu,
Polishko Ihor O.
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2024-12-19
