Development of robust YSZ thin-film electrolyte by RF sputtering and anode support design for stable IT-SOFC

Park, Chan-ho; Kim, Yo Han; Jeong, Hyeongwon; Won, Bo-Ram; Jeon, Hyejin; Myung, Jae-ha

doi:10.1016/j.ceramint.2023.07.270

Cited by 11 publications

(3 citation statements)

References 52 publications

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“…The total cell Rp is the sum of these three components. The fitting results of this equivalent circuit in the figure closely match the experimental data [36]. Using impedance spectra to calculate the area-specific resistance (ASR) is a method used to evaluate the electrochemical performance of symmetric electrodes.…”

Section: Materials Characterizationsupporting

confidence: 58%

Mechanistic Study on the Corrosion of (La,Sr)(Co,Fe)O3-δ Cathodes Induced by CO2

Xu,

Zhang,

Zhou

et al. 2023

Molecules

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Solid Oxide Fuel Cell (SOFC) cathodes operating in ambient atmospheric conditions inevitably encounter CO2 contamination, leading to sustained performance deterioration. In this investigation, we examined the impact of CO2 on three variants of (La,Sr)(Co,Fe)O3-δ cathodes and employed the distribution of relaxation times method to distinguish distinct electrochemical processes based on impedance spectra analysis. We meticulously analyzed and discussed the corrosion resistance of these (La,Sr)(Co,Fe)O3-δ cathodes under high CO2 concentrations, relying on the experimental data. Electrochemical impedance spectroscopy results revealed that La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF−6428), La0.4Sr0.6Co0.2Fe0.8O3-δ (LSCF−4628), and La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ (LSCFN−46271) cathodes exhibited persistent degradation when exposed to CO2 at temperatures of 650 °C or 800 °C during the durability-testing period. An increase in electrode polarization resistance was observed upon CO2 introduction to the electrode, but electrode performance recovered upon returning to a pure air environment. Furthermore, X-ray diffraction and scanning electron microscopy analyses confirmed that CO2 did not cause permanent damage to the (La,Sr)(Co,Fe)O3-δ cathodes. These findings indicate that the (La,Sr)(Co,Fe)O3-δ cathodes exhibit excellent resistance to CO2-induced corrosion.

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Section: Materials Characterizationsupporting

confidence: 58%

Mechanistic Study on the Corrosion of (La,Sr)(Co,Fe)O3-δ Cathodes Induced by CO2

Xu,

Zhang,

Zhou

et al. 2023

Molecules

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“…Thus, the highest intensity peak of (200) for 15 YSZ obviously indicates that a strong (200) orientation preference has occurred. (200) preferred orientations for sputtered YSZ thin films also have been confirmed by XRD results in some literature reports. − Based on those reported studies, preferred orientations for sputtered thin films depend on many parameters such as microstructures of underlying substrate surfaces, substrate bias, substrate temperature, and sputtering pressure. In the present study, the sputtering pressure is the dominant factor.…”

Section: Resultsmentioning

confidence: 98%

Nanocrystal Engineering of Thin-Film Yttria-Stabilized Zirconia Electrolytes for Low-Temperature Solid-Oxide Fuel Cells

Ryu,

Choi,

Kim

et al. 2023

ACS Appl. Mater. Interfaces

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“…Various techniques were developed to deposit thin-film electrolytes for fabricating a high performant cell, which can be operated at lower temperatures compared to that of conventional cells. [5][6][7] To fabricate thin-film SOFCs, high-quality anode-support or metal support must be developed.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of NiFe Anode-Support for Thin-Film Solid-Oxide Fuel Cell

KHAN,

SONG,

WATANABE

et al. 2024

Electrochemistry

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A dense NiO-Fe 2 O 3 (NiFe) pellet has been developed as a potential anode-support for thin-film solid oxide fuel cells (SOFCs). However, preparation of dense NiFe is very challenging. Hole-formed NiFe pellets or porous NiFe pellets are frequently formed, which cannot be used as a support (substrate) for thin-film SOFCs. Therefore, this hole-formed NiFe support is simply wasted. In this report, we attempt to re-qualify this NiFe support to be a valuable substrate, which can be used for fabricating thin-film SOFCs. By deposition of smaller NiFe particles to cover the hole-formed NiFe support, the surface of this NiFe pellet is modified. Large holes on the surface disappear. The newly formed NiFe support can be used for fabricating a single cell with La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3−δ as thinfilm electrolyte operated at intermediate temperature. Maximum power density generated from this cell is 0.45, 0.86 and 1.28 W cm −2 at 873, 923 and 973 K, respectively.

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Development of robust YSZ thin-film electrolyte by RF sputtering and anode support design for stable IT-SOFC

Cited by 11 publications

References 52 publications

Mechanistic Study on the Corrosion of (La,Sr)(Co,Fe)O3-δ Cathodes Induced by CO2

Mechanistic Study on the Corrosion of (La,Sr)(Co,Fe)O3-δ Cathodes Induced by CO2

Nanocrystal Engineering of Thin-Film Yttria-Stabilized Zirconia Electrolytes for Low-Temperature Solid-Oxide Fuel Cells

Surface Modification of NiFe Anode-Support for Thin-Film Solid-Oxide Fuel Cell

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