A5026684165- Advancements in Solid Oxide Fuel Cells
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced ceramic materials synthesis
- Catalytic Processes in Materials Science
- Electronic and Structural Properties of Oxides
- Hybrid Renewable Energy Systems
- Nuclear Materials and Properties
- Molten salt chemistry and electrochemical processes
- Nuclear materials and radiation effects
- Chemical Looping and Thermochemical Processes
- Ferroelectric and Piezoelectric Materials
- Gas Sensing Nanomaterials and Sensors
- Electrochemical Analysis and Applications
- Electron and X-Ray Spectroscopy Techniques
- Intermetallics and Advanced Alloy Properties
- Hydrogen Storage and Materials
- Zeolite Catalysis and Synthesis
- Silicon and Solar Cell Technologies
- Glass properties and applications
- Advanced Battery Technologies Research
- Cultural Heritage Materials Analysis
- Aluminum Alloys Composites Properties
- Advanced Memory and Neural Computing
- Advanced Battery Materials and Technologies
Technical University of Denmark
1983-2019
Universität Hamburg
2012
IRD Fuel Cells (Denmark)
2009
Centre for Sustainable Energy
1987-2005
Nordic Laboratory for Luminescence Dating
1988-2003
McMaster University
1980-1982
Ni/yttria stabilized zirconia (YSZ) supported solid oxide electrolysis cells (SOECs) were exposed to long-term galvanostatic tests, under different testing conditions (temperature, gas composition, current density etc.) with an emphasis on high (above −1 A/cm2). Detailed post-mortem characterizations carried out investigate microstructural changes after focusing the Ni/YSZ electrode. Formation of ZrO2 nano-particles Ni surfaces was observed in or −1.5 A/cm2 at 800 850°C, but not those tested...
Silver nanowires (AgNWs) and zinc oxide (ZnO) are deposited on flexible substrates using fast roll‐to‐roll (R2R) processing. The AgNW film polyethylene terephthalate (PET) shows >80% uniform optical transmission in the range of 550–900 nm. This electrode is compared to previously reported currently widely produced indium‐tin‐oxide (ITO) replacement comprising (PET)|silver grid|poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)|ZnO known as Flextrode. AgNW/ZnO higher than...
The LiBH4–LiI solid solution is a good Li+ conductor and promising crystalline electrolyte for all-solid-state lithium based batteries. focus of the present work on effect heat treatment conduction. Solid solutions with LiI content 6.25–50% were synthesized by high-energy ball milling annealed at 140 °C. Powder X-ray diffraction scanning electron microscopy used characterizing samples comparing their crystallite sizes density defects before after annealing. conductivity was measured using...
A relatively simple procedure of infiltrating nano-sized Ce<sub>0.8</sub>Gd<sub>0.2</sub>O<sub>2−δ</sub> electrocatalysts into the state-of-the-art Ni/YSZ cathode greatly enhanced performance and durability solid oxide electrolysis cells.
Abstract An electrochemical study of SOFC cathode degradation, due to poisoning by chromium oxide vapours, was performed applying 3‐electrode set‐ups. The materials comprised LSM/YSZ and LSCF/CGO composites, whereas the electrolyte material 8YSZ. degradation performance investigated as a function time under current load 0.2 or 0.4 A cm –2 in presence Cr 2 O 3 at 850 750 °C air, dry water saturated room temperature, compared that non‐Cr exposed reference specimens tested under, otherwise,...
Long-term operation strongly affects the microstructure of Ni/YSZ cermets used in state art fuel electrodes for solid oxide cells. The microstructural changes are considered to heavily affect cell degradation. In this paper, characterization electrode a electrolysis tested as part stack 1 year was performed through focused ion beam-scanning electron microscopy and energy dispersive X-ray spectroscopy. A reference two locations interest were selected: one at steam inlet side other outlet....
Abstract In this work, co‐electrolysis of steam and carbon dioxide was studied in a Topsoe Fuel Cell (TOFC®) 10‐cell stack, containing three different types Ni/yttria stabilized zirconia (YSZ) electrode supported solid oxide electrolysis cells with footprint 12 × cm. The stack operated at 800 °C –0.75 A cm –2 60% conversion for period 1,000 h. One type the showed no long term degradation but actually activation during entire period, while other two degraded. performance durability cell is...
Abstract Mild annealing enables inactive nitrogen (N)‐doped amorphous carbon (a‐C) films abundant with chaotic bonds prepared by magnetron sputtering to become effective for the oxygen reduction reaction (ORR) virtue of generating pyridinic N. The rhythmic variation ORR activity elaborates well on subtle evolution C−N conferred spectroscopic analysis.
Oxidation rates of ferritic steels used as interconnector plates in Solid Oxide Electrolysis Stacks are concern they may be determining for the life time technology. In this study oxidation experiments were carried out up to 1000 hours hydrogen-side and oxygen-side simulated atmospheres at 800°C. Four commercially available alloys: Crofer 22 APU, H, AL29-4, E-Brite characterized humidified hydrogen. One alloy, APU was also pure oxygen both as-prepared state after application a protective...
Abstract An optimum method is proposed to prepare thin foil transmission electron microscopy (TEM) lamellae of multiphase porous functional ceramics: prefilling the pore space these materials with an epoxy resin prior focused ion beam milling. Several advantages impregnation are demonstrated by successful preparation TEM specimens that maintain structural integrity entire lamella. Feasibility alignment procedure demonstrated, and ideal analyses illustrated on solid oxide fuel cell...
Nb-doped SrTiO3 anodes, infiltrated with CGO/Ni, were investigated by electrochemical impedance spectroscopy (EIS) and high resolution microscopy techniques, upon varying production testing parameters. The analysis involved a combination of distribution relaxation times (DRT) complex non-linear least squares (CNLS) fitting routine. These electrodes studied as single-phase or composites 8YSZ. Sr0.94Ti0.9Nb0.1O3-δ/ 10 vol.% 8YSZ composite the best overall performers, enhanced performance...
Multi-layered ceramics for electrochemical flue gas purification were fabricated by tape casting and lamination or multi-layer casting. The sintered bodies studied scanning electron microscopy impedance spectroscopy. It was shown that the samples made had a lower resistance than laminated samples. This mainly due to decrease of middle frequency arc, attributed charge transfer close triple phase boundary. cells showed ability oxidize propene both under open circuit voltage when polarized.
Porous cell stacks with composite electrodes of La0.85Sr0.15CoxMn1-xO3-Ce0.9Gd0.1O1.95 were tested for activity toward selective electrochemical reduction NOx to N2 in the presence 10% O2. The produced by tape casting, laminating and sintering backbone structure followed infiltration BaO or La0.85Sr0.15MnO3+δ. an atmosphere 1000 ppm NO NO2 + O2 Ar as reference, temperature range 250 500°C. investigated electrochemically cyclic voltammetry polarization, outlet gas composition was monitored....
Orthorhombic α‐KFeSiO 4 ( a =0.5478, b =0.9192, c =0.8580 nm), hexagonal β‐KFeSiO =0.5309, =0.8873 and γ‐KFeSiO =0.5319, =0.8815 nm) were synthesized by devitrification of KFeSiO glass. Powder X‐ray diffraction data are given for all three polymorphs. Alpha , the high‐temperature polymorph, melts congruently at 1197°± 2°C. Mössbauer spectroscopy α phase indicates that Fe 3+ occupies two tetrahedral sites in lattice. Beta low‐temperature metastable appear to be isomorphous with kalsilite,...