Degradation study of a reversible solid oxide cell (rSOC) short stack using distribution of relaxation times (DRT) analysis

Sampathkumar, Suhas Nuggehalli; Aubin, Philippe; Couturier, Karine; Sun, Xiufu; Sudireddy, Bhaskar Reddy; Diethelm, Stefan; Pérez–Fortes, Mar; herle, Jan Van

doi:10.1016/j.ijhydene.2022.01.104

Cited by 50 publications

(8 citation statements)

References 48 publications

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“…Additionally, considerably higher degradation rates have been reported at higher current densities and lower operating temperatures . Interestingly, operation in the SOFC mode suppresses the electrode degradation induced during operation in the SOEC mode. ,− To explain this surprising result, Hughes et al hypothesized that shortened cycling may interrupt some unfavorable incubations (e.g., oxygen-bubble formation, cation migration, and zirconate-phase nucleation), which subsequently interrupt degradation. Therefore, the reversal of a current operation is also a promising approach for solving problems associated with oxygen-electrode delamination.…”

Section: Stability: Bundled and Stacked Cellsmentioning

confidence: 99%

Syngas Production from CO₂ and H₂O via Solid-Oxide Electrolyzer Cells: Fundamentals, Materials, Degradation, Operating Conditions, and Applications

Hou,

Jiang,

Wei

et al. 2024

Chem. Rev.

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Highly efficient coelectrolysis of CO 2 /H 2 O into syngas (a mixture of CO/ H 2 ), and subsequent syngas conversion to fuels and value-added chemicals, is one of the most promising alternatives to reach the corner of zero carbon strategy and renewable electricity storage. This research reviews the current state-of-the-art advancements in the coelectrolysis of CO 2 /H 2 O in solid oxide electrolyzer cells (SOECs) to produce the important syngas intermediate. The overviews of the latest research on the operating principles and thermodynamic and kinetic models are included for both oxygen-ion-and proton-conducting SOECs. The advanced materials that have recently been developed for both types of SOECs are summarized. It later elucidates the necessity and possibility of regulating the syngas ratios (H 2 :CO) via changing the operating conditions, including temperature, inlet gas composition, flow rate, applied voltage or current, and pressure. In addition, the sustainability and widespread application of SOEC technology for the conversion of syngas is highlighted. Finally, the challenges and the future research directions in this field are addressed. This review will appeal to scientists working on renewable-energy-conversion technologies, CO 2 utilization, and SOEC applications. The implementation of the technologies introduced in this review offers solutions to climate change and renewable-power-storage problems.

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Section: Stability: Bundled and Stacked Cellsmentioning

confidence: 99%

Syngas Production from CO₂ and H₂O via Solid-Oxide Electrolyzer Cells: Fundamentals, Materials, Degradation, Operating Conditions, and Applications

Hou,

Jiang,

Wei

et al. 2024

Chem. Rev.

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“…Ghamarinia et al [ 7 ] reviewed some degradation factors on SOEC performance. Non-destructive testing analysis of SOECs using electrochemical impedance spectroscopy technology can clearly determine the factors that lead to cell performance degradation and their impact on cell impedance growth [ 8 , 9 ], such as attenuation factors leading to increasing ohmic impedance, polarization impedance, or gas diffusion impedance [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Controllable Technology for Thermal Expansion Coefficient of Commercial Materials for Solid Oxide Electrolytic Cells

Sun,

Jin,

Zhang

et al. 2024

Materials

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Solid oxide electrolysis cell (SOEC) industrialization has been developing for many years. Commercial materials such as 8 mol% Y2O3-stabilized zirconia (YSZ), Gd0.1Ce0.9O1.95 (GDC), La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF), La0.6Sr0.4CoO3−δ (LSC), etc., have been used for many years, but the problem of mismatched thermal expansion coefficients of various materials between cells has not been fundamentally solved, which affects the lifetime of SOECs and restricts their industry development. Currently, various solutions have been reported, such as element doping, manufacturing defects, and introducing negative thermal expansion coefficient materials. To promote the development of the SOEC industry, a direct treatment method for commercial materials—quenching and doping—is reported to achieve the controllable preparation of the thermal expansion coefficient of commercial materials. The quenching process only involves the micro-treatment of raw materials and does not have any negative impact on preparation processes such as powder slurry and sintering. It is a simple, low-cost, and universal research strategy to achieve the controllable preparation of the thermal expansion coefficient of the commercial material La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) through a quenching process by doping elements and increasing oxygen vacancies in the material. Commercial LSCF materials are heated to 800 °C in a muffle furnace, quickly removed, and cooled and quenched in 3.4 mol/L of prepared Y(NO3)3. The thermal expansion coefficient of the treated material can be reduced to 13.6 × 10−6 K−1, and the blank sample is 14.1 × 10−6 K−1. In the future, it may be possible to use the quenching process to select appropriate doping elements in order to achieve similar thermal expansion coefficients in SOECs.

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“…35,000 h), which is necessary for market introduction. They show a continuous loss of performance during operation ('degradation'), which leads to the critical potential limit for anode reoxidation being undershot or an unreasonably high loss of performance [3][4][5]. If there is a loss of around 15 to 25% in relation to the nominal power, the product would be classified as defective.…”

Section: Introductionmentioning

confidence: 99%

Study on the Degradation of SOFC Anodes Induced by Chemical and Electrochemical Sintering Using EIS and µ-CT

Sourkouni,

Argirusis

2023

Applied Sciences

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The goal of the present study was to quantify degradation phenomena on anodes that can be attributed to chemical (thermal) and/or electrochemical sintering, to find out the underlying mechanisms, and to propose countermeasures. The samples were thermally aged for times from 0 to 1000 h, and additional samples of the same type were subjected to electrochemical loading over the same period. The cells were then examined for microstructural changes using FE-SEM/EDS and micro-computed tomography (µ-CT), and the results are correlated with electrochemical impedance spectroscopy (EIS) parameters of long-term electrochemical experiments under dry and humid conditions. It has been shown that it is possible to distinguish between the thermal (chemical) and the electrochemical part of the microstructure degradation. Humidity is an important factor that affects the microstructure in the long term. Tortuosity, porosity, and specific resistance change with time, depending on the humidity of the fuel. Tortuosity changes by one order of magnitude in the direction perpendicular to the electrode surface, while in the other two directions in the plane, the changes are only moderate. Porosity increases in all electrochemically treated samples by 1–5% depending on dry ore humidity conditions and time. As all other experimental parameters are the same in all experiments, the EIS results confirm through the increasing specific resistance, mainly the influence of the changes on the microstructure on the electrochemical properties of the cells.

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Degradation study of a reversible solid oxide cell (rSOC) short stack using distribution of relaxation times (DRT) analysis

Cited by 50 publications

References 48 publications

Syngas Production from CO₂ and H₂O via Solid-Oxide Electrolyzer Cells: Fundamentals, Materials, Degradation, Operating Conditions, and Applications

Syngas Production from CO₂ and H₂O via Solid-Oxide Electrolyzer Cells: Fundamentals, Materials, Degradation, Operating Conditions, and Applications

Controllable Technology for Thermal Expansion Coefficient of Commercial Materials for Solid Oxide Electrolytic Cells

Study on the Degradation of SOFC Anodes Induced by Chemical and Electrochemical Sintering Using EIS and µ-CT

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Degradation study of a reversible solid oxide cell (rSOC) short stack using distribution of relaxation times (DRT) analysis

Cited by 50 publications

References 48 publications

Syngas Production from CO2 and H2O via Solid-Oxide Electrolyzer Cells: Fundamentals, Materials, Degradation, Operating Conditions, and Applications

Syngas Production from CO2 and H2O via Solid-Oxide Electrolyzer Cells: Fundamentals, Materials, Degradation, Operating Conditions, and Applications

Controllable Technology for Thermal Expansion Coefficient of Commercial Materials for Solid Oxide Electrolytic Cells

Study on the Degradation of SOFC Anodes Induced by Chemical and Electrochemical Sintering Using EIS and µ-CT

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Product

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Syngas Production from CO₂ and H₂O via Solid-Oxide Electrolyzer Cells: Fundamentals, Materials, Degradation, Operating Conditions, and Applications

Syngas Production from CO₂ and H₂O via Solid-Oxide Electrolyzer Cells: Fundamentals, Materials, Degradation, Operating Conditions, and Applications