Long-term durability of La0.75Sr0.25Cr0.5Mn0.5O−3 as a fuel electrode of solid oxide electrolysis cells for co-electrolysis

Kwon, Youngjin; Yoo, Jae Young; Jang, Young-hoon; Bae, Joongmyeon

doi:10.1016/j.jcou.2019.03.004

Cited by 25 publications

(8 citation statements)

References 34 publications

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“…61,62 Long term test in CO 2 /CO gas stream has been reported. 63 Therefore, based on our results and gap in literature we can conclude that to improve the understanding about reasons of instability of these materials a long-or mid-term tests at well-defined conditions (pO 2 , T, E) should be performed and analyzed using electrochemical as well as microstructural analysis methods.…”

Section: Impedance Analysis Of (La 1-x Sr X ) Y Cr 05-z Mn 05-w Ni Z+...mentioning

confidence: 74%

Influence of A- and B-Site Modifications of (La_1-xSr_x)_yCr_0.5-zMn_0.5-wNi_z+wO_3-δ on Electrochemical Impedance Characteristics of Reversible Solid Oxide Cell

Maide

Paiste

Möller

et al. 2019

J. Electrochem. Soc.

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Influence of A-site deficiency and chemical composition of B-site (concentration of Ni, Mn, and Cr) on electrochemical performance of hydrogen electrode in (La 1-x Sr x ) y Cr 0.5-z Mn 0.5-w Ni z+w O 3-δ |(Sc 2 O 3 ) 0.10 (CeO 2 ) 0.01 (ZrO 2 ) 0.89 |La 0.8 Sr 0.2 FeO 3-δ reversible solid oxide fuel cell has been studied. Electrochemical characterization has been carried out in fuel cell and electrolysis regimes. Results indicate that in fuel cell regime most notable limiting steps were detected around 0.5 Hz frequency range and were attributed to gas-solid adsorption-desorption processes. pO 2 variation in the oxygen electrode compartment led to small variations in a total impedance of single cells but was not the limiting process. In electrolysis mode, the dissociative adsorption was shown as an important limiting stage and limitations in kinetic region of charge transfer step were remarkable. Increase of A-site deficiency caused a significant increase in high-frequency series resistance as well as some increase of total polarization resistance. Variation in B-site composition had a significant influence on electrochemical performance with very different frequency dependence of impedance. Highest current density values of 0.27 and 0.66 A cm −2 at unit cell potentials of 0.9 and 1.5 V, respectively, at 850°C were measured for La 0.75 Sr 0.25 Cr 0.3 Mn 0.5 Ni 0.2 O 3-δ (fuel cell mode) and (La 0.8 Sr 0.2 ) x Cr 0.49 Mn 0.49 Ni 0.02 O 3-δ (electrolysis mode) in hydrogen fuel gas with pH 2 O = 0.03 and 0.30 atm, respectively.

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Section: Impedance Analysis Of (La 1-x Sr X ) Y Cr 05-z Mn 05-w Ni Z+...mentioning

confidence: 74%

Influence of A- and B-Site Modifications of (La_1-xSr_x)_yCr_0.5-zMn_0.5-wNi_z+wO_3-δ on Electrochemical Impedance Characteristics of Reversible Solid Oxide Cell

Maide

Paiste

Möller

et al. 2019

J. Electrochem. Soc.

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“…189 cm −1 at an oxygen partial pressure of 1.013 × 10 −3 Pa and 1.5 S cm −1 in 5% H 2 . 168 Because LSCM can be used as a fuel electrode for both O−SOECs 169 and H−SOECs, 170 it is a suitable symmetric electrode material. 115 However, the catalytic activity and conductivity of LSCM are both substantially lower than that of Ni−YSZ, which restricts the application of LSCM in SOECs.…”

Section: Fe-based Perovskite Oxidesmentioning

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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“…In electrolysis mode, the degradation rates were calculated as high as 0.4 mV h -1 for the LSCM-cell (16). Also, it has been noted that the catalytic performance of LSCM was stable for 1200 h in the co-electrolysis environment (17).…”

Section: Introductionmentioning

confidence: 97%

Influence of Sr²⁺ Concentration and A-Site Deficiency on Surface Stability of (La₁ _- _ySr_y)_xCr_0.5Mn_0.45Ni_0.05O₃ _-δ

et al. 2021

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(La1–ySry)xCr0.5Mn0.45Ni0.05O3–δ (LSCMN) is a perovskite (ABO3) type mixed ionic-electronic conductive (MIEC) oxide and has been proposed as an electrode material for high temperature fuel cell. The material is catalytically active for oxidation of hydrogen and hydrocarbons. A significant amount of attention has been paid to stability issues if the material is used as an anode in a solid oxide fuel cell. So far, there is a lack of information about the dependence between A-site stoichiometry and stability performance of LSCMN surface. The La/Sr ratio and deficiency of A-site, i.e. A-site stoichiometry of (La1–ySry)xCr0.5Mn0.45Ni0.05O3–δ were varied and chemical composition of LSCMN surface and lattice parameters was studied. The chemical and structural changes of the material surface (segregation of some LSCMN components onto the surface and decomposition of perovskite phase) have a key role in the electrochemical performance and initial degradation rate of the electrode. XRD results for studied electrode powders showed significant dependence of the lattice parameters on the A-site composition. Materials were treated in synthetic air and in H2 environment. TOF SIMS analysis demonstrated the dependence of the surface stoichiometry on the A-site composition of bulk electrode as well as on the different gas environments after heat treatment. To improve the durability of the solid oxide cell fuel electrodes, it is inevitable to understand the degradation mechanisms during the cell operation and during cell fabrication.

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Long-term durability of La0.75Sr0.25Cr0.5Mn0.5O−3 as a fuel electrode of solid oxide electrolysis cells for co-electrolysis

Cited by 25 publications

References 34 publications

Influence of A- and B-Site Modifications of (La_1-xSr_x)_yCr_0.5-zMn_0.5-wNi_z+wO_3-δ on Electrochemical Impedance Characteristics of Reversible Solid Oxide Cell

Influence of A- and B-Site Modifications of (La_1-xSr_x)_yCr_0.5-zMn_0.5-wNi_z+wO_3-δ on Electrochemical Impedance Characteristics of Reversible Solid Oxide Cell

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

Influence of Sr²⁺ Concentration and A-Site Deficiency on Surface Stability of (La₁ _- _ySr_y)_xCr_0.5Mn_0.45Ni_0.05O₃ _-δ

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Long-term durability of La0.75Sr0.25Cr0.5Mn0.5O−3 as a fuel electrode of solid oxide electrolysis cells for co-electrolysis

Cited by 25 publications

References 34 publications

Influence of A- and B-Site Modifications of (La1-xSrx)yCr0.5-zMn0.5-wNiz+wO3-δ on Electrochemical Impedance Characteristics of Reversible Solid Oxide Cell

Influence of A- and B-Site Modifications of (La1-xSrx)yCr0.5-zMn0.5-wNiz+wO3-δ on Electrochemical Impedance Characteristics of Reversible Solid Oxide Cell

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

Influence of Sr2+ Concentration and A-Site Deficiency on Surface Stability of (La1 - ySry)xCr0.5Mn0.45 Ni0.05O3 -δ

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Influence of A- and B-Site Modifications of (La_1-xSr_x)_yCr_0.5-zMn_0.5-wNi_z+wO_3-δ on Electrochemical Impedance Characteristics of Reversible Solid Oxide Cell

Influence of A- and B-Site Modifications of (La_1-xSr_x)_yCr_0.5-zMn_0.5-wNi_z+wO_3-δ on Electrochemical Impedance Characteristics of Reversible Solid Oxide Cell

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

Influence of Sr²⁺ Concentration and A-Site Deficiency on Surface Stability of (La₁ _- _ySr_y)_xCr_0.5Mn_0.45Ni_0.05O₃ _-δ