Electronic engineering and oxygen vacancy modification of La0.6Sr0.4FeO3−δ perovskite oxide by low-electronegativity sodium substitution for efficient CO2/CO fueled reversible solid oxide cells

“…To assess the electrical properties of MHPSCs, a thorough understanding of their electro-ionic interaction phenomena is crucial. This has been a focal point in the perovskite community, and attempts to understand these phenomena have been made by using current–voltage ( J – V ), current–transient ( I – T ), and electrochemical impedance spectroscopy (EIS) measurements under the conditions of varied temperatures, scan rates, or biases. − In comparison to J – V and I – T studies, EIS has emerged as a robust characterization tool due to its ability to provide information related to the ionic and charge movements with variation in frequency …”

Section: Introductionmentioning

confidence: 99%

In-Line Electrochemical Impedance Spectroscopy for Real-Time Circuit Identification and Interpretation in Metal Halide Perovskite Single Crystals

Kadiwala,

Pandey,

Purohit

et al. 2024

J. Phys. Chem. C

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Electrochemical impedance spectroscopy (EIS) has played a crucial role in understanding electronic and ionic responses in MHPs through frequency and time domain analyses. This study introduces a novel approach by integrating supervised machine learning to develop in-line automation for classifying and fitting the EIS spectra for metal halide perovskite single crystals (MHPSCs). By employing widely used EIS circuits for MHPSCs, we establish a chronological link and offer a comprehensive physical interpretation. Our model utilizes simulated data to accurately classify experimental EIS spectra and provides precise fitting values of electronic components, enhancing the spectroscopic analysis of MHPSCs. The Decision Tree classifier demonstrates superior accuracy in classifying EIS spectra compared to Random Forest and XGBoost models. Incorporating 3-fold cross-validation confirms its reliability with notable versatility in capturing spectral changes under varying bias conditions. Our study establishes a chronological link between the widely used EIS circuits for MHPSCs and offers comprehensive physical interpretations.

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Dual‐Doping Strategy for Lowering the Thermal Expansion Coefficient and Promoting the Catalytic Activity in Perovskite Cobaltate Air Electrodes for Solid Oxide Cells

Wang,

Zhang,

Chen

et al. 2024

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Lowering the thermal expansion coefficient (TEC) and promoting the catalytic activity of cobalt‐based perovskite air electrodes is crucial for efficient solid oxide cells (SOCs) devices. However, the co‐achievement of both merits has usually been largely compromised in most scenarios. Herein, a dual‐doping strategy to manipulate the properties of perovskite cobaltate electrocatalyst is reported in which a high valence element of Ta5+ is incorporated into B‐site to significantly suppress the dynamic reduction of Co4+ species and reduces the TEC value from PrBaCo2O5+δ (PBC, 17.8 × 10⁻6 K−1) to PrBaCo1.96Ta0.04O5+δ (PBCT, 12.5 × 10⁻6 K−1) and suppresses the oxygen loss in SOCs operation condition, revealing the improved structural stability. Meanwhile, the Ca2+ is doped into A‐site of Ta‐incorporated candidate, further decreasing the covalency of Co─O bonds and facilitating the formation of oxygen vacancies, benefiting the oxygen exchange kinetics and leading to a low polarization resistance of 0.026 Ω cm2 (800 °C) in as‐prepared PrBa0.8Ca0.2Co1.96Ta0.04O5+δ (PBCCT) electrode. The cell with PBCTT demonstrates remarkable robustness during a 50 h thermal cycling test (25 cycles). Moreover, it delivers a high current density of 1.44 A cm⁻2 (1.6 V, 800 °C), as well as attractive durability over 100 h for pure CO2 electrolysis.

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Electronic engineering and oxygen vacancy modification of La_0.6Sr_0.4FeO_3−δ perovskite oxide by low-electronegativity sodium substitution for efficient CO₂/CO fueled reversible solid oxide cells

Abstract: exceptional current efficiency and high reaction kinetics. The identification of an active fuel electrode is highly desirable to promote the performance of RSOCs. This study explores the use of a...

Cited by 8 publications

References 65 publications

Advancements and prospects of perovskite-based fuel electrodes in solid oxide cells for CO₂ electrolysis to CO

Advancements and prospects of perovskite-based fuel electrodes in solid oxide cells for CO₂ electrolysis to CO

In-Line Electrochemical Impedance Spectroscopy for Real-Time Circuit Identification and Interpretation in Metal Halide Perovskite Single Crystals

Dual‐Doping Strategy for Lowering the Thermal Expansion Coefficient and Promoting the Catalytic Activity in Perovskite Cobaltate Air Electrodes for Solid Oxide Cells

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Electronic engineering and oxygen vacancy modification of La0.6Sr0.4FeO3−δ perovskite oxide by low-electronegativity sodium substitution for efficient CO2/CO fueled reversible solid oxide cells

Abstract: exceptional current efficiency and high reaction kinetics. The identification of an active fuel electrode is highly desirable to promote the performance of RSOCs. This study explores the use of a...

Cited by 8 publications

References 65 publications

Advancements and prospects of perovskite-based fuel electrodes in solid oxide cells for CO2 electrolysis to CO

Advancements and prospects of perovskite-based fuel electrodes in solid oxide cells for CO2 electrolysis to CO

In-Line Electrochemical Impedance Spectroscopy for Real-Time Circuit Identification and Interpretation in Metal Halide Perovskite Single Crystals

Dual‐Doping Strategy for Lowering the Thermal Expansion Coefficient and Promoting the Catalytic Activity in Perovskite Cobaltate Air Electrodes for Solid Oxide Cells

Contact Info

Product

Resources

About

Electronic engineering and oxygen vacancy modification of La_0.6Sr_0.4FeO_3−δ perovskite oxide by low-electronegativity sodium substitution for efficient CO₂/CO fueled reversible solid oxide cells

Advancements and prospects of perovskite-based fuel electrodes in solid oxide cells for CO₂ electrolysis to CO

Advancements and prospects of perovskite-based fuel electrodes in solid oxide cells for CO₂ electrolysis to CO