Moisture-dependent electrochemical characterization of Ba0.2Sr1.8Fe1.5Mo0.5O6-δ as the fuel electrode for solid oxide electrolysis cells (SOECs)

Kamlungsua, Kittiwat; Su, Pei-Chen

doi:10.1016/j.electacta.2020.136670

Cited by 10 publications

(7 citation statements)

References 41 publications

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“…A similar effect has been reported with barium doping, Ba 0.2 Sr 1.8 Fe 1.5 Mo 0.5 O 6-δ double perovskite as fuel electrode, which showed good performance with the appropriate steam amount of 20% [181].…”

Section: Solid Oxide Electrolysis Cellssupporting

confidence: 80%

Main Hydrogen Production Processes: An Overview

et al. 2021

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Due to its characteristics, hydrogen is considered the energy carrier of the future. Its use as a fuel generates reduced pollution, as if burned it almost exclusively produces water vapor. Hydrogen can be produced from numerous sources, both of fossil and renewable origin, and with as many production processes, which can use renewable or non-renewable energy sources. To achieve carbon neutrality, the sources must necessarily be renewable, and the production processes themselves must use renewable energy sources. In this review article the main characteristics of the most used hydrogen production methods are summarized, mainly focusing on renewable feedstocks, furthermore a series of relevant articles published in the last year, are reviewed. The production methods are grouped according to the type of energy they use; and at the end of each section the strengths and limitations of the processes are highlighted. The conclusions compare the main characteristics of the production processes studied and contextualize their possible use.

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Section: Solid Oxide Electrolysis Cellssupporting

confidence: 80%

Main Hydrogen Production Processes: An Overview

et al. 2021

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“…In contrast, the LF process decreases under cathodic polarization and increases under anodic polarization. A similar behavior has been observed for La 0.3 Sr 0.7 Fe 0.7 Cr 0.3 O 3−δ and Sr 1.8 Ba 0.2 Fe 1.5 Mo 0.5 O 6−δ under anodic polarization; however, additional studies at different pH 2 and pH 2 O values are needed to better understand and identify the different processes involved in the hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) in these nanocomposite electrodes. , …”

Section: Resultssupporting

confidence: 63%

LaCrO₃–CeO₂-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells

Zamudio‐García

Porras-Vázquez

Losilla

et al. 2022

ACS Appl. Energy Mater.

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La 0.98 Cr 0.75 Mn 0.25 O 3−δ –Ce 0.9 Gd 0.1 O 1.95 (LCM-CGO) nanocomposite layers with different LCM contents, between 40 and 60 wt %, are prepared in a single step by a spray-pyrolysis deposition method and evaluated as both air and fuel electrodes for solid oxide fuel cells (SOFCs). The formation of fluorite (CGO) and perovskite (LCM) phases in the nanocomposite electrode is confirmed by different structural and microstructural techniques. The intimate mixture of LCM and CGO phases inhibits the grain growth, retaining the nanoscale microstructure even after annealing at 1000 °C with a grain size lower than 50 nm for LCM-CGO compared to 200 nm for pure LCM. The synergetic effect of nanosized LCM and CGO by combining their high electronic and ionic conductivity, respectively, leads to efficient and durable symmetrical electrodes. The best electrochemical properties are found for 50 wt % LCM-CGO, showing polarization resistance values of 0.29 and 0.09 Ω cm 2 at 750 °C in air and H 2 , respectively, compared to 2.05 and 1.9 Ω cm 2 for a screen-printed electrode with the same composition. This outstanding performance is mainly ascribed to the nanoscale electrode microstructure formed directly on the electrolyte at a relatively low temperature. These results reveal that the combination of different immiscible phases with different crystal structures and electrochemical properties could be a promising strategy to design highly efficient and durable air and fuel electrodes for SOFCs.

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“…From their experiments, the authors conclude that the optimal calcination temperature for Ba-doped SFM is 1100 °C, thus avoiding the formation of secondary phases like SrMoO 4 during calcination. Furthermore, the authors reported that SOEC operation with a gas composition containing 20% H 2 O + 80% H 2 led to a maximum current density of −0.18 A cm −2 at a set voltage of 0.2 V and −0.36 A cm −2 for 0.4 V. 395 SFM-SDC fuel electrodes in a symmetrical LSGM electrolytesupported cell in co-electrolysis operation were investigated at 850 °C using a set voltage of 1.3 V. 180 A current density of −0.734 A cm −2 and a polarization resistance of 0.48 U cm 2 at OCV and 850 °C were achieved in a 16% H 2 O + 16% CO 2 + 20% H 2 + 48% N 2 atmosphere. The authors produced syngas with a corresponding CO 2 conversion rate of 0.58 and an ideal H 2 /CO ratio of approx.…”

Section: Fuel Electrodementioning

confidence: 99%

“…SFM was also doped with Ba to obtain a double perovskite electrode material with improved electrochemical properties. 395 As a result of doping the A-site cations with the larger Ba cations, the authors expected an enhanced oxide ion migration due to the expansion of the unit cell. In this publication, electrochemical measurements were performed on half-cells with 0.2 mol% barium-doped SFM as an electrode (Ba 0.2 Sr 1.8 Fe 1.5 Mo 0.5 O 6− δ ).…”

Section: Solid Oxid Electrolysis Cell Componentsmentioning

confidence: 99%

Solid oxide electrolysis cells – current material development and industrial application

Wolf,

Winterhalder,

Vibhu

et al. 2023

J. Mater. Chem. A

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Moisture-dependent electrochemical characterization of Ba0.2Sr1.8Fe1.5Mo0.5O6-δ as the fuel electrode for solid oxide electrolysis cells (SOECs)

Cited by 10 publications

References 41 publications

Main Hydrogen Production Processes: An Overview

Main Hydrogen Production Processes: An Overview

LaCrO₃–CeO₂-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells

Solid oxide electrolysis cells – current material development and industrial application

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Moisture-dependent electrochemical characterization of Ba0.2Sr1.8Fe1.5Mo0.5O6-δ as the fuel electrode for solid oxide electrolysis cells (SOECs)

Cited by 10 publications

References 41 publications

Main Hydrogen Production Processes: An Overview

Main Hydrogen Production Processes: An Overview

LaCrO3–CeO2-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells

Solid oxide electrolysis cells – current material development and industrial application

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LaCrO₃–CeO₂-Based Nanocomposite Electrodes for Efficient Symmetrical Solid Oxide Fuel Cells