Yttria-stabilized zirconia thin films with restrained columnar grains for oxygen ion conducting electrolytes

Hong, Soonwook; Lee, Dohaeng; Lim, Young-Chul; Bae, Jiwoong; Kim, Young‐Beom

doi:10.1016/j.ceramint.2016.07.123

Cited by 24 publications

(13 citation statements)

References 36 publications

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“…Monzon et al 107 implement the powder extrusion molding method in the manufacturing of Ni-YSZ support tubes. Hong et al 109 controlled the argon flow rate in fabricating the dense YSZ electrolyte with thin-film structure and the columnar grains production was restricted. The fabricated system performs high stability and durability with no degradation for 1000 hours, 400 mA cm -2 of current densities at 0.8 , and 800°C.…”

Section: Progress Work From 2015 To 2017 On Ysz Electrolytementioning

confidence: 99%

“…The sputter deposition technique is the method used. Hong et al 109 controlled the argon flow rate in fabricating the dense YSZ electrolyte with thin-film structure and the columnar grains production was restricted. Well, the crystalline phase created higher ionic conductivity, higher peak power density, and superior open circuit voltage when lower argon flow rate was used.…”

Section: Progress Work From 2015 To 2017 On Ysz Electrolytementioning

confidence: 99%

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A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

et al. 2019

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Solid Oxide Fuel Cells (SOFCs) are an electrochemical energy converter that receives the world's attention as a power generation system of the future owing to its flexibility to consume various types of fuels, low emission of greenhouses gases, and having high efficiency reaching over 70%. A conventional SOFCs operates at high temperature, typically ranges between 800 to 1000°C. SOFCs use yttria-stabilized zirconia (YSZ) as the electrolyte, which exhibits excellent oxide ion conductivity in this temperature range. However, this temperature range poses an issue to SOFCs durability, as it leads to the degradation of the cell components. In addition, SOFCs application is limited and difficult to implement for the transportation sector and portable appliance. A viable solution is to lower the SOFCs operating temperature to intermediate (600 to 800°C ) or low (<600°C) operating temperature. The benefit of this way, cell durability will improve, as well as other advantages such as facilitates handling, assembling, dismantling, cost reduction, and expanded the SOFCs application. Nonetheless, the key challenge for the issue is finding suitable electrolyte, as YSZ have lower ionic conductivity at low and intermediate temperature range. The aim of this paper is to review the status and challenges in the attempts made to modify YSZ electrolyte within the past decade. The resulting ionic conductivity, microstructure, and densification, mechanical and thermal properties of these 'new' electrolytes critically reviewed. The targeted conductivity of modification of YSZ electrolyte must be exceeded >0.1 S cm -1 to enable high performance of SOFCs power generation systems to be realized for transportation and portable applications. Based on our knowledge, this paper is the first review which focused on the recent status and challenges of YSZ electrolyte towards lowering the operating temperature.

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Section: Progress Work From 2015 To 2017 On Ysz Electrolytementioning

confidence: 99%

Section: Progress Work From 2015 To 2017 On Ysz Electrolytementioning

confidence: 99%

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

et al. 2019

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“…According to Thornton model [ 42 ] describing the film structure depending on the substrate temperature T and melting temperature T m , the films obtained at T / T m = 0.2–0.3 possess a columnar structure with voids along the grain boundaries inside the columns and between them. This columnar structure is typical of all YSZ electrolyte films deposited by magnetron sputtering [ 12 , 17 , 30 ]. In our early research [ 43 ], we however showed that after high-temperature annealing, the columnar structure merges and becomes totally indistinguishable due to the mass diffusion inside the YSZ films at the sintering stage.…”

Section: Resultsmentioning

confidence: 91%

“…The magnetron sputtered YSZ electrolyte films were studied in [ 14 , 15 , 16 , 17 , 18 ] and in the state-of-the-art paper [ 19 ]. It was shown that the microstructure, phase composition, and other parameters of the YSZ electrolyte films depended on the magnetron sputtering modes, electric supply parameters (RF, DC, pulsed DC), working pressure, substrate temperature, substrate bias voltage, and post-annealing treatment.…”

Section: Introductionmentioning

confidence: 99%

Influence of Deposition Modes and Thermal Annealing on Residual Stresses in Magnetron-Sputtered YSZ Membranes

et al. 2022

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Thin-film electrolyte made of 8-mol% yttria stabilized zirconia (8YSZ) for solid oxide fuel cells (SOFCs) was fabricated on anode substrates using reactive magnetron sputtering of Zr-Y targets in a mixture of Ar and O2 gases. The deposition of 4–6 µm thin-film electrolyte was in the transition or oxide modes differing by the oxygen concentration in the sputtering atmosphere. The half-cell bending of the anode-supported SOFCs was measured to determine the residual stresses in the electrolyte films after the deposition and thermal annealing in air. The dependences were studied between the deposition modes, residual stresses in the films, and the SOFC performance. At 800 °C, the maximum power density of SOFCs ranged between 0.58 and 1.2 W/cm2 depending on the electrolyte deposition mode. Scanning electron microscopy was carried out to investigate the surface morphology and structure of the YSZ electrolyte films after thermal annealing. Additionally, an X-ray diffraction analysis of the YSZ electrolyte films was conducted for the synchrotron radiation beam during thermal annealing at different temperatures up to 1300 °C. It was found that certain deposition modes provide the formation of the YSZ electrolyte films with acceptable residual stresses (<1 GPa) at room temperature, including films deposited on large area anodes (100 × 100 mm2).

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“…4 To achieve an effective performance of low-temperature SOFC, the method chosen for the deposition of YSZ thin film must be so practical that YSZ electrolyte could be obtained as thin as possible. [5][6][7][8] Thin YSZ electrolyte can be obtained in many ways, either physical deposition or chemical deposition. Physical deposition (such as sputtering, chemical vapour deposition (CVD), pulsed laser deposition (PLD) and Atomic Laser Deposition (ALD)) can produce a high quality nano-scale YSZ thin film up to \ 100 nm.…”

Section: Introductionmentioning

confidence: 99%

Varied layer thickness improves structural properties of YSZ thin film

Rahimi

Thirugnana

Ghoshal

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part N:

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In this study, the Yttrium Stabilized Zirconia (YSZ) thin films were deposited on the sapphire substrate (Al2O3) by dip-coating method using simple ethanol-based YSZ suspension. The layer thickness of YSZ films were varied by sintering at 1300°C. Phase change and structural evolution in YSZ films were observed by conducting X-ray diffraction (XRD) analyses. The microstructures and the surface morphology of the deposited films were examined using Atomic Force Microscope (AFM) and Field Emission Scanning Electron Microscope (FESEM). The XRD pattern revealed a phase change from cubic to monoclinic with an increase in YSZ layer thickness. The crystallite size was varied in the range of 9.68–42.98 nm with the changes in the layer thickness. Meanwhile, the AFM image analyses showed a layer thickness-dependent variation in the grain size (205.83–373.77 nm) and the RMS surface roughness (16.72–36.44 nm). The FESEM images of the achieved film exhibited the occurrence of a dense morphology. It was concluded that by controlling the layer thickness of the deposited films, their improved structure and morphology can be achieved.

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Yttria-stabilized zirconia thin films with restrained columnar grains for oxygen ion conducting electrolytes

Cited by 24 publications

References 36 publications

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

Influence of Deposition Modes and Thermal Annealing on Residual Stresses in Magnetron-Sputtered YSZ Membranes

Varied layer thickness improves structural properties of YSZ thin film

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