A5089034235- Advancements in Solid Oxide Fuel Cells
- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Electronic and Structural Properties of Oxides
- Chemical Looping and Thermochemical Processes
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Thermal Expansion and Ionic Conductivity
- Magnetic and transport properties of perovskites and related materials
- Gas Sensing Nanomaterials and Sensors
- CO2 Reduction Techniques and Catalysts
- Advancements in Battery Materials
- Hybrid Renewable Energy Systems
- Molten salt chemistry and electrochemical processes
- Nuclear Materials and Properties
- Catalysts for Methane Reforming
- Perovskite Materials and Applications
- Semiconductor materials and devices
- Advanced Battery Technologies Research
- Advanced Battery Materials and Technologies
- Carbon Dioxide Capture Technologies
- Conducting polymers and applications
- Ferroelectric and Piezoelectric Materials
- Advanced X-ray Imaging Techniques
- solar cell performance optimization
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2015-2024
Stuttgart Observatory
2021
Institute of Engineering
2021
École Nationale Supérieure des Mines de Paris
2008-2013
Centre des Matériaux
2007-2011
Centre National de la Recherche Scientifique
2008-2009
Abstract Mixed ionic‐electronic conducting (MIEC) membranes have gained growing interest recently for various promising environmental and energy applications, such as H 2 O production, CO reduction, separation, membrane reactors production of chemicals, cathode development solid oxide fuel cells, solar‐driven evaporation energy‐saving regeneration well electrolyzer cells power‐to‐X technologies. The purpose this roadmap, written by international specialists in their fields, is to present a...
The focus of this study is the measurement and understanding sulfur poisoning phenomena Ni/gadolinium-doped ceria (CGO) based solid oxide fuel cells (SOFC). Cells with Ni/CGO10 NiCu5/CGO40 anodes were characterized by using impedance spectroscopy at different temperatures H
One of the most powerful tools in solid oxide cell (SOC) characterization is electrochemical impedance spectroscopy, which can unfold important insights into SOC performance characteristics and degradation behavior. To obtain a better understanding behavior Ni/CGO fuel electrodes, this work presents comprehensive investigation state-of-the-art Ni/CGO10-based electrolyte-supported cells. Commercial Ni/CGO10|CGO10|3YSZ|CGO10|Ni/CGO10 symmetrical cells were characterized between 550–975°C at...
<italic>A</italic>-site deficient chromite La<sub>0.65</sub>Sr<sub>0.3</sub>Cr<sub>0.85</sub>Ni<sub>0.15</sub>O<sub>3−δ</sub> (L65SCrN) decorated by <italic>in situ</italic> Ni exsolution was implemented as fuel electrode on 5 cm × reversible electrolyte-supported solid oxide cells (rSOCs).
Deciphering electrochemical processes at the surface of Ba 0.5 Gd 0.8 La 0.7 Co 2 O 6− δ to design a high performance oxygen electrode for reversible proton conducting ceramic cells.
Proton conducting ceramic cells (PCCs) are an attractive emerging technology operating in the intermediate temperature range of 500 to 700 °C. In this work, we evaluate production hydrogen at temperatures by proton cell electrolysis (PCCEL). We demonstrate a high-performance steam owing composite positrode based on BaGd0.8La0.2Co2O6−δ (BGLC1082) and BaZr0.5Ce0.4Y0.1O3−δ (BZCY541). The high reliability PCCEL is demonstrated for 1680 h current density as –0.8 A cm–2 close thermoneutral voltage...
Electrolyte supported Solid Oxide Cells (ESCs) with advanced thin-film Gd-doped ceria diffusion barrier layers between electrolyte and electrodes were assembled electrochemically investigated in steam electrolysis mode a so-called “rainbow” stack 30 repeat units (RUs). The deposited onto the supports via electron-beam physical evaporation deposition (EB-PVD) method at 600 °C. In this paper, investigation mainly focuses on electrochemical characteristics of RUs containing EB-PVD GDC layers....
To minimize alteration of the La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF)/Gd0.2Ce0.8O2−δ(CGO20)/Y0.06Zr0.94O2−δ(3YSZ) interface via strontium zirconate formation in solid oxide cells, electron beam physical vapor deposition was employed to manufacture dense, thin gadolinium-doped ceria (CGO) interlayers. CGO layers with thicknesses 0.15, 0.3, and 0.5 μm were integrated state-of-the-art 5 × cm2-large electrolyte-supported their performance characteristics degradation behavior investigated....
We present a combined modeling and experimental study of electrochemical oxygen reduction at mixed-conducting composite LSCF/CGO solid oxide fuel cell (SOFC) cathodes. The developed kinetic model incorporates elementary heterogeneous chemistry charge-transfer processes two different double layers, transport in the porous electrode (ionic electronic conduction, multi-component diffusion convection) as well gas supply. A full set thermodynamic parameters is developed. Experimentally,...
The current paper reports the details of challenges and progress in joint project on development metal supported solid oxide fuel cells stacks by teams German Aerospace Center (DLR), ElringKlinger, Sulzer Metco Plansee. An account materials is given followed advances processing techniques which include alternative plasma spraying colloidal spraying. Improvement cell stack design then discussed faced during building operations solution implemented.
The aim of the present study is measurement and understanding sulfur poisoning phenomena in nickel/gadolinium-doped ceria (CGO) based solid oxide fuel cells (SOFC) operating on reformate fuels. behavior commercial, high-performance electrolyte-supported (ESC) with Ni/Ce0.9Gd0.1O2−δ (CGO10) anodes operated different fuels was thoroughly investigated by means current–voltage characteristics electrochemical impedance spectroscopy compared Ni/Yttria-stabilized zirconia (YSZ) anodes. Various...
The lanthanum strontium chromite perovskite La0.65Sr0.3Cr0.85Ni0.15O3-δ (L65SCrN) was implemented as fuel electrode in electrolyte-supported cells (ESC). electrochemical cell performance steam electrolysis operation with a gas mixture of 80% H2O–20% H2 demonstrated to be comparable that Ni-CGO-based state the art at 860 °C. At 830, 800, and 770 °C, exhibited gain performance. Lower apparent activation energy barrier values were calculated for L65SCrN symmetrical full configurations, contrast...
An elementary kinetic model is developed and applied to explore the influence of sulfur poisoning on behavior solid oxide fuel cell (SOFC) anodes. A detailed multi-step reaction mechanism formation oxidation at Ni/YSZ anodes together with channel gas-flow, porous-media transport charge-transfer chemistry established for SOFCs operating H2/H2O mixtures trace amounts hydrogen sulfide (H2S). thermodynamic data set compiled from various literature sources. The derived chemical model, validated...
Abstract The chemical industry must become carbon neutral by 2050, meaning that process‐, energy‐, and product‐related CO 2 emissions from fossil sources are completely suppressed. This goal can only be reached using renewable energy, secondary raw materials, or as a source. latter done indirectly through the bioeconomy directly utilizing air biogenic (integrated biorefinery). Until 2030, waste fossil‐based processes utilized to curb reach turning point of global emissions. A technology mix...
In this work, material-sensitive atomic force microscopy (AFM) techniques were used to analyse the cathodes of lithium-sulfur batteries. A comparison their nanoscale electrical, electrochemical, and morphological properties was performed with samples prepared by either suspension-spraying or doctor-blade coating different binders. Morphological studies before after electrochemical tests using AFM scanning electron (SEM). The that contained polyvinylidene fluoride (PVDF) spray-coating...
Abstract High temperature solid oxide cells are attractive electrochemical reactors to perform simultaneous reduction of steam and CO 2 into syngas with the possibility delivering a tailored composition downstream processes. The main thermodynamic considerations, performance impedance curves electrolyte supported in co‐electrolysis shown as function pressure. In dynamic operation, thermal changes that reactor undergoes appear stronger mode than electrolysis should be considered development...
The currently ongoing scale-up of high-temperature solid oxide electrolysis (SOEL) requires an understanding the underlying dominant degradation mechanisms to enable continuous progress in increasing stack durability. In present study, behavior SOEL stacks type “MK35x” with chromium-iron-yttrium (CFY) interconnects and electrolyte-supported cells (ESC) developed at Fraunhofer IKTS was investigated. For this purpose, initial electrochemical performance a 10-cell characterized various...
In recent years the degradation rates of high temperature stacks with solid oxide cells (SOC) during steady-state long-term operation in fuel cell (SOFC) and electrolysis (SOEC) mode have been steadily decreased. contrast, quantification understanding mechanisms SOC reversible SOFC/SOEC cycling still remains a challenging issue. Therefore, present paper focusses on detailed analysis discussion phenomena two galvanostatic SOFC operation. The electrode supported Elcogen (Estonia) were...