A5045004772- Advancements in Solid Oxide Fuel Cells
- Electrocatalysts for Energy Conversion
- Electronic and Structural Properties of Oxides
- Fuel Cells and Related Materials
- Magnetic and transport properties of perovskites and related materials
- Catalytic Processes in Materials Science
- Chemical Looping and Thermochemical Processes
- Catalysis and Oxidation Reactions
- Gas Sensing Nanomaterials and Sensors
- Electrochemical Analysis and Applications
- Ionic liquids properties and applications
- Chemical and Physical Properties in Aqueous Solutions
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Nuclear Materials and Properties
- Analytical Chemistry and Sensors
- Metallurgical Processes and Thermodynamics
- Semiconductor materials and devices
- Corrosion Behavior and Inhibition
- Concrete and Cement Materials Research
- Conducting polymers and applications
- Metal Extraction and Bioleaching
- Electron and X-Ray Spectroscopy Techniques
- Machine Learning in Materials Science
- Molten salt chemistry and electrochemical processes
University of Tartu
2015-2024
Swiss Federal Laboratories for Materials Science and Technology
2010
Gadolinia doped ceria Ce0.9Gd0.1O2-δ (GDC) barrier layer was deposited onto YSZ electrolyte and Ni-YSZ|YSZ half-cell using pulsed laser deposition (PLD), magnetron sputtering (MS) or spray pyrolysis (SP) methods. The first set of GDC layers studied without additional sintering the second additionally sintered for 3 h at 1300°C. Sr mobility initiated by thermal treatment La0.6Sr0.4CoO3-δ cathode 950°C 1100°C systematically with prepared PLD, MS SP Concentration profiles Zr ion in GDC, Ce YSZ,...
The complex relationships between the microstructure of mixed ionic-electronic conductor La0.6Sr0.4CoO3−δ (LSC) and electrode performance have been investigated on a quantitative level. Symmetric half cells single with various LSC microstructures were synthesized using series raw cathode powders different particle size distributions. dual beam FIB-SEM method was used to perform 3-D analysis obtain data such as surface area, volume fractions, pore distribution, triple phase boundary length...
Ceramic materials with perovskite structure have recently attracted attention as possible redox stable, sulfur- and carbon tolerant cathode for solid oxide electrolysis cells. In this study ceramic SOE single cell was fabricated using impregnation method. La0.8Sr0.2Cr0.5Mn0.5O3–δ-Zr0.94Sc0.06O2–δ activated CeO2 Pd nanoparticles investigated potential co-electrolysis at various working temperatures, potentials inlet gas compositions. Based on the electrochemical measurements data performed...
Porous La0.6Sr0.4CoO3−δ cathodes for intermediate temperature solid oxide fuel cell applications have been studied under different electrochemical potentials and at oxygen partial pressures using high-temperature in situ XRD (HT-XRD) method. Reversible changes the lattice parameters of were observed depending on (T), electrode potential (E) pressure (pO2) applied. At fixed T pO2, cathode noticeably influences unit volume, thus, stoichiometry concentration vacancies. Influence volume was more...
Mixing ionic liquids is a suitable strategy to tailor properties, e.g., reduce melting points. The present study aims widen the application range of low-toxic choline-based by studying eight binary phase diagrams six different choline carboxylates. Five them show eutectic points with dropping 13 45 °C. mixtures acetate and 2-methylbutarate were found melt at °C, which represents remarkable point depression compared pure compounds 81 (choline acetate) 90 °C 2-methylbutarate), respectively....
A novel dual chamber (DC) measurement cell has been implemented for simultaneous monitoring of crystallographic and electrochemical (EC) properties Ni-Ce0.9Gd0.1O2−δ (Ni-GDC) solid oxide fuel (SOFC) anode at different polarizations. The influence system parameters (temperature, oxygen partial pressure in compartment ion flux through the electrolyte membrane from cathode to anode) on structure GDC redox performance Ni studied. leads increase layers close electrolyte. Increase decrease unit...
Electrochemical impedance, cyclic voltammetry, and chronoamperometry have been used for characterization of the medium-temperature half-cells (Sys 1), 2), 3) at various electrode potentials temperatures. Analysis impedance data shows that kinetically mixed process is probable, characterized by slow electron transfer to an adsorbed thereafter dissociated oxygen atom , as well mass electroactive species inside cathode or internal surface porous cathode. The total polarization resistance...
The solid oxide fuel cell symmetrical cells with porous cathodes for intermediate temperature applications have been studied under electrochemical polarization and oxygen feeding conditions using high-temperature in situ XRD (HT-XRD) method. Changes the lattice parameters of La0.6Sr0.4CoO3−δ La0.6Sr0.4Co0.2Fe0.8O3−δ were observed depending on (T), electrode potential (E) partial pressure (pO2) applied. At fixed T pO2, cathode noticeably influences crystallographic volume calculated, thus,...
Long term stability is one of the decisive properties solid oxide fuel cell (SOFC) as well electrolysis (SOEC) materials from commercialization perspective. To improve understanding about degradation mechanisms cells with different electrode compositions should be studied. In this work, Ni-Zr0.92Y0.08O2-δ (Ni-YSZ)| Zr0.92Y0.08O2-δ (YSZ)|Ce0.9Gd0.1O2-δ (GDC)|Pr0.6Sr0.4CoO3-δ (PSC) are tested in SOFC regime for 17,820 h at 650 °C, and SOEC 860 800 °C. The experiment showed a speed 2.4% per...