Characteristic and challenges of scandia stabilized zirconia as solid oxide fuel cell material – In depth review

Arifin, Nor Anisa; Afifi, Abdullah A; Samreen, Ayesha; Hafriz, R.S.R.M.; Muchtar, Andanastuti

doi:10.1016/j.ssi.2023.116302

Cited by 8 publications

(3 citation statements)

References 195 publications

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“…It is known that highly symmetrical phases (cubic fluorite and pseudocubic t″) of scandium-stabilized zirconium dioxide solid solutions have the highest oxygen ionic conductivity. The conductivity of the tetragonal modifications is noticeably lower, while the conductivity of the rhombohedral phases is the lowest [ 37 ]. At the same time, the electrical properties of grain boundaries in ceramic materials strongly depend on the type and concentration of impurities segregated in the region of grain boundaries [ 38 ].…”

Section: Results and Dictationmentioning

confidence: 99%

Structure and Physical Properties of Ceramic Materials Based on ZrO2-Sc2O3 for SOFC Electrolytic Membranes Obtained from Powders of Melted Solid Solutions with a Similar Composition

Agarkov,

Borik,

Buzaeva

et al. 2023

Membranes

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This paper presents the results of studying the phase composition, luminescent characteristics, and ionic conductivity of ceramic scandium-stabilized solid solutions of zirconium dioxide containing 9 and 10 mol% Sc2O3. Ceramic samples were prepared by sintering powders obtained by grinding melted solid solutions of the same composition. A comparative analysis of the obtained data with similar characteristics of single crystals has been carried out. Differences in the phase composition of ceramics and initial single crystals were found. The effect of the structure and properties of grain boundaries on the ionic conductivity of ceramic samples is discussed. It is shown that the differences in the ionic conductivity of ceramic samples and crystals are mainly due to changes in the structure and phase composition.

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Section: Results and Dictationmentioning

confidence: 99%

Structure and Physical Properties of Ceramic Materials Based on ZrO2-Sc2O3 for SOFC Electrolytic Membranes Obtained from Powders of Melted Solid Solutions with a Similar Composition

Agarkov,

Borik,

Buzaeva

et al. 2023

Membranes

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“…Note that, unlike the atoms of Y, Ca, or Mg, the ionic radii of Sc 3+ and Zr 4+ differ insignificantly, 87 and 84 pm, correspondingly [ 23 ], so the lattice distortion due to Sc doping is less significant than, for example, to Y. This is the critical factor responsible for the highest ionic conductivity of ScSZ among the other zirconia-based electrolytes [ 24 , 25 , 26 ]. However, conductivity strongly depends on temperature, and zirconia-based bicomponent electrolytes do not exhibit practical conductivity levels, except at temperatures of about 800 °C or higher [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline Cubic Phase Scandium-Stabilized Zirconia Thin Films

Danchuk,

Shatalov,

Zinigrad

et al. 2024

Nanomaterials

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The cubic zirconia (ZrO2) is attractive for a broad range of applications. However, at room temperature, the cubic phase needs to be stabilized. The most studied stabilization method is the addition of the oxides of trivalent metals, such as Sc2O3. Another method is the stabilization of the cubic phase in nanostructures—nanopowders or nanocrystallites of pure zirconia. We studied the relationship between the size factor and the dopant concentration range for the formation and stabilization of the cubic phase in scandium-stabilized zirconia (ScSZ) films. The thin films of (ZrO2)1−x(Sc2O3)x, with x from 0 to 0.2, were deposited on room-temperature substrates by reactive direct current magnetron co-sputtering. The crystal structure of films with an average crystallite size of 85 Å was cubic at Sc2O3 content from 6.5 to 17.5 mol%, which is much broader than the range of 8–12 mol.% of the conventional deposition methods. The sputtering of ScSZ films on hot substrates resulted in a doubling of crystallite size and a decrease in the cubic phase range to 7.4–11 mol% of Sc2O3 content. This confirmed that the size of crystallites is one of the determining factors for expanding the concentration range for forming and stabilizing the cubic phase of ScSZ films.

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“…The solution of this problem lies in additional material doping of small amounts of ceria (1 mol%) resulting in stabilization of the material cubic structure. A number of studies in the ternary system has been carried out so far [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60].…”

Section: Introductionmentioning

confidence: 99%

The explanation of electrical properties changes under NH3 and H2 containing atmospheres in risen temperatures of ceria- and zirconia-based solid electrolytes by means of electrochemical impedance spectroscopy

Dziubaniuk

2024

Preprint

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In the presented research, commercial powders of nominal compositions: Ce0.8Gd0.2O1.9, Sc0.1Ce0.01Zr0.89O1.95, Sc0.09Yb0.01Zr0.9O1.95 structural and electrochemical properties were investigated. The X-ray diffraction of the specimens at room temperature showed a cubic phase. Electrical properties studies over a wide range of frequencies (0.1 Hz to 32 MHz) and temperature (200–600 °C) were analyzed using impedance spectroscopic technique in different atmospheres (synthetic air, 3000 ppm NH3 in argon, 10% H2 in argon). The impedance plane plot shows semicircle arcs at different temperatures and electrical equivalent circuit have been proposed to analyze the impedance results. Basing on comparison of the spectra in different atmospheres the reactions on the three-phase boundaries were proposed as well as the conduction mechanisms of the electrolytes were described. The material based on ceria is mixed ionic-electronic conductor, while in zirconia-based materials electrical conduction is realized by oxygen ion carriers. The electrochemical properties of the powders were compared from the applicative point of view as a candidate for element in fuel cells and gas sensors.

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Characteristic and challenges of scandia stabilized zirconia as solid oxide fuel cell material – In depth review

Cited by 8 publications

References 195 publications

Structure and Physical Properties of Ceramic Materials Based on ZrO2-Sc2O3 for SOFC Electrolytic Membranes Obtained from Powders of Melted Solid Solutions with a Similar Composition

Structure and Physical Properties of Ceramic Materials Based on ZrO2-Sc2O3 for SOFC Electrolytic Membranes Obtained from Powders of Melted Solid Solutions with a Similar Composition

Nanocrystalline Cubic Phase Scandium-Stabilized Zirconia Thin Films

The explanation of electrical properties changes under NH3 and H2 containing atmospheres in risen temperatures of ceria- and zirconia-based solid electrolytes by means of electrochemical impedance spectroscopy

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