Development of novel metal-supported proton ceramic electrolyser cell with thin film BZY15–Ni electrode and BZY15 electrolyte

Stange, M.; Stefan, Elena; Denonville, Christelle; Larring, Yngve; Rørvik, Per Martin; Haugsrud, Reidar

doi:10.1016/j.ijhydene.2017.03.028

Cited by 22 publications

(19 citation statements)

References 26 publications

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“…Lastly using supporting layers should be considered as a potential improvement of the cell stability. Metal supported cells have been developed for SOFCs and a similar approach is also being developed for PCFC/PCECs [425]. Tucker [339] discussed the coefficient of thermal expansion mismatch between the electrolyte and metal support as a function of temperature.…”

Section: Mitigating Strategiesmentioning

confidence: 99%

Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes

2018

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This review paper focuses on the phenomenon of thermochemical expansion of two specific categories of conducting ceramics: Proton Conducting Ceramics (PCC) and Mixed Ionic-Electronic Conductors (MIEC). The theory of thermal expansion of ceramics is underlined from microscopic to macroscopic points of view while the chemical expansion is explained based on crystallography and defect chemistry. Modelling methods are used to predict the thermochemical expansion of PCCs and MIECs with two examples: hydration of barium zirconate (BaZr1−xYxO3−δ) and oxidation/reduction of La1−xSrxCo0.2Fe0.8O3−δ. While it is unusual for a review paper, we conducted experiments to evaluate the influence of the heating rate in determining expansion coefficients experimentally. This was motivated by the discrepancy of some values in literature. The conclusions are that the heating rate has little to no effect on the obtained values. Models for the expansion coefficients of a composite material are presented and include the effect of porosity. A set of data comprising thermal and chemical expansion coefficients has been gathered from the literature and presented here divided into two groups: protonic electrolytes and mixed ionic-electronic conductors. Finally, the methods of mitigation of the thermal mismatch problem are discussed.

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Section: Mitigating Strategiesmentioning

confidence: 99%

Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes

2018

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“…Recently, Stange et al successfully prepared a complete half-cell on ferritic stainless steel support, with barium yttrium zirconate-Ni (BZY-Ni) electrode and BZY electrolyte deposited by pulsed laser deposition (PLD) [25,26]. Under electrolysis conditions (hydrogen vs. steam), the cell displayed a high total resistance of 40 Ohm•cm 2 at 600 °C, indicating that significant optimization effort remains to achieve the performance expected for a BZY-based cell.…”

Section: Metal-supported Solid Oxide Cells (Ms-socs) Incorporate Thinmentioning

confidence: 99%

Approaches for co-sintering metal-supported proton-conducting solid oxide cells with Ba(Zr,Ce,Y,Yb)O3-δ electrolyte

Wang

Lau

Ding

et al. 2019

International Journal of Hydrogen Energy

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Approaches for co-sintering metal-supported proton-conducting solid oxide cells with Ba(Zr,Ce,Y,Yb)O3-Δ electrolyte Permalink https://escholarship.org/uc/item/91m4d824 Abstract Proton conducting oxide electrolyte materials could potentially lower the operating temperature of metal-supported solid oxide cells (MS-SOCs) to the intermediate range 400 to 600 °C. The porous metal substrate provides the advantages of MS-SOCs such as high thermal and redox cycling tolerance, low-cost of structural materials, and mechanical ruggedness. In this work, the viability of co-sintering fabrication of metal-supported proton conducting solid oxide cells using BaZr 1-x-y Ce x Y y O 3-δ (BZCY) is investigated. BZCY ceramics are sintered at 1450 °C in reducing environment alone and supported on Fe-Cr alloy metal support, and key characteristics such as Ba loss, sintering behavior, and chemical compatibility with metal support are determined. Critical challenges are identified for this fabrication approach, including: contamination of the electrolyte with Si and Cr from the metal support, incomplete electrolyte sintering, and evaporation of electrolyte constituents.Various approaches to overcome these limitations are proposed, and preliminary assessment indicates that the use of barrier layers, low-Si-content stainless steel, and sintering aids warrant further development.

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“…The deposition of coatings throughout the porous structure improved the oxidation rate in both air and fuel atmospheres in the temperature range of 600 to 900 °C. Coating with Y, La, La0.2Sr0.8Ti0.9Ni0.1O3-δ (LSTN), La(Mn,Co)-oxide (LMC), Mn-oxide, or LaCrO3 [10,[14][15][16][17][18][19][20] decreased mass gain rate by approximately 80%. LMC decreased mass gain by three orders of magnitude during exposure to humidified hydrogen at 600 °C -a condition at which the uncoated baseline alloy displayed breakaway oxidation [20].…”

Section: Introductionmentioning

confidence: 99%

“…Post-oxidation determination of scale thickness by scanning electron microscopy is a plausible way to directly measure accumulated oxidation, but the thickness observed depends on the relative angle between the cross-section cut and the local steel surface. The simplest widely-used approach is to report mass gain percentage (or based on superficial area) as a function of exposure time [9,[14][15][16][18][19][20]. This approach is useful for comparative purposes, and we employ it here.…”

Section: Introductionmentioning

confidence: 99%

Oxidation of porous stainless steel supports for metal-supported solid oxide fuel cells

Reisert

Berova

Aphale

et al. 2020

International Journal of Hydrogen Energy

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Oxidation behavior of porous P434L ferritic stainless steel, used for the fabrication of metalsupported solid oxide fuel cells (MS-SOFC), is studied under anodic and cathodic atmospheres. Temperature-and atmosphere-dependence is determined for as-sintered and pre-oxidized stainless steel. Pre-oxidation reduced the long-term oxidation rate. For pre-oxidized samples, the oxidation rate in air exceeds that in humid hydrogen for temperatures above 700°C. The influence of PrOx, LSCF-SDC, and Ni-SDC coatings is also examined. The coatings do not dramatically impact oxide scale growth. Oxidation in C-free and C-containing anodic atmospheres is similar. Addition of CO2, CH4, and CO to humidified hydrogen to simulate ethanol reformate does not significantly impact oxidation behavior. Cr transpiration in humid air is greatly reduced by the PrOx coating, and a PrCrO3 reaction product is observed throughout the porous structure. A dense and protective chromia-based scale forms on steel samples during oxidation in all conditions. A thin silica enriched oxide layer also forms at the metal-scale interface. In general, the oxidation behavior at 700°C is found to be acceptable.

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Development of novel metal-supported proton ceramic electrolyser cell with thin film BZY15–Ni electrode and BZY15 electrolyte

Cited by 22 publications

References 26 publications

Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes

Thermal and Chemical Expansion in Proton Ceramic Electrolytes and Compatible Electrodes

Approaches for co-sintering metal-supported proton-conducting solid oxide cells with Ba(Zr,Ce,Y,Yb)O3-δ electrolyte

Oxidation of porous stainless steel supports for metal-supported solid oxide fuel cells

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