A5086195022- Advancements in Solid Oxide Fuel Cells
- Fuel Cells and Related Materials
- Electronic and Structural Properties of Oxides
- Electrocatalysts for Energy Conversion
- Advanced ceramic materials synthesis
- Catalytic Processes in Materials Science
- Advanced materials and composites
- Brake Systems and Friction Analysis
- Electrophoretic Deposition in Materials Science
- Metallurgical Processes and Thermodynamics
- Magnetic and transport properties of perovskites and related materials
- Nuclear materials and radiation effects
- Semiconductor materials and devices
- Injection Molding Process and Properties
- Additive Manufacturing and 3D Printing Technologies
- Ferroelectric and Piezoelectric Materials
- Powder Metallurgy Techniques and Materials
- Tribology and Wear Analysis
- Electrical and Thermal Properties of Materials
- Intermetallics and Advanced Alloy Properties
- Inorganic and Organometallic Chemistry
- Microwave Dielectric Ceramics Synthesis
- Pigment Synthesis and Properties
- Innovative Microfluidic and Catalytic Techniques Innovation
- Concrete Corrosion and Durability
Technical University of Denmark
2001-2017
Nordic Laboratory for Luminescence Dating
2005-2008
American Ceramic Society
2005
Centre for Sustainable Energy
2002
The degradation behavior of anode supported solid oxide fuel cells (SOFCs) was investigated as a function operating temperature and current density. Degradation rates were defined shown to be mainly dependent on the cell polarization. combination detailed evaluation electrochemical properties by impedance spectroscopy, in particular, post-test microscopy revealed that cathode dominant contribution at higher densities lower temperatures. found contribute more Generally, obtained temperatures,...
Solid oxide fuel cells produced at Risø National Laboratory have been tested as electrolysis by applying an external voltage. Results on initial performance and durability of such reversible solid temperatures from 750 to current densities are reported. The full area specific resistance low for operation . During galvanostatic long-term tests, the were observed passivate mainly during first electrolysis. Cells that passivated tests can be partly activated again in cell mode or even constant...
Abstract The contributions of the individual components cell (anode, cathode, and electrolyte) to resistance were determined experimentally, directly from impedance spectra obtained a full cell. It was an anode supported thin electrolyte cell, consisting YSZ electrolyte, Ni/YSZ cermet anode, LSM composite cathode. Additional, qualitative information using symmetric cells with electrodes. investigations carried out in temperature interval 700 850 °C. activation energies 0.9 1.1 eV,...
Abstract Metal‐supported solid oxide fuel cells are expected to offer several potential advantages over conventional anode (Ni‐YSZ) supported cells. For example, increased resistance against mechanical and thermal stresses a reduction in material costs. When Ni‐YSZ based anodes used metal SOFC, elements from the active layer may inter‐diffuse with metallic support during sintering. This work illustrates how inter‐diffusion problem can be circumvented by using an alternative design on porous...
Metal-supported solid oxide fuel cells are expected to offer several potential advantages over conventional anode (Ni-YSZ) supported cells, such as increased resistance against mechanical and thermal stresses a reduction in materials cost. When Ni-YSZ based anodes used metal SOFC, electrode material from the active layer may interdiffuse with metallic support during sintering. The purpose of this work is illustrate how interdiffusion problem can be circumvented by using an alternative design...
Abstract The EU‐sponsored project “METSOFC”, completed at the end of 2011, resulted in a number advancements toward implementing mechanically robust metal support as structural element SOFC. Technical University Denmark (DTU) Energy Conversion's research into planar supported cells (MSCs) has produced an advanced cell design with high performance and mechanical robustness. At low operation temperatures (650 °C), these have shown Area‐specific resistances (ASRs): 0.35 Ω cm 2 tests (16 active...
Camber evolution and stress development during co‐firing of asymmetric bilayer laminates, consisting porous Ce 0.9 Gd 0.1 O 1.95 gadolinium‐doped cerium oxide ( CGO ) La 0.85 Sr 0.15 MnO 3 lanthanum strontium manganate LSM )‐ were investigated. Individual layer shrinkage was measured by optical dilatometer, the uniaxial viscosities determined as a function density using vertical sintering approach. The camber in laminates recorded situ it found to correspond well with one predicted...
Al 2 O 3 powders have been successfully dispersed in ethanol by varying the suspension acidity. An operational pH (O.pH) was defined to measure acidity of these ethanol‐based suspensions. The isoelectric point at an O.pH 8. According Derjaguin–Landau–Verwey–Overbeek (DLVO) theory, suspensions between 3.5–10.5 possessed only attractive inter‐particle potential. Suspensions below 3.5 had high ζ potential, fine particle size, and were Newtonian. However, shear thinning consisted agglomerates,...
Abstract In the present paper, anode supported solid oxide fuel cells (SOFCs), produced on a pre‐pilot plant scale in ten batches of ∼100 cells, are characterised with respect to performance. The main purpose was evaluate reproducibility scaled‐up process. Based 20 tests, average area specific cell resistance at 850 °C found be 0.24 Ω cm 2 standard deviation 0.05 . variation performance between can largely attributed variations cathode Experimental evidence will presented full 4 × symmetric...
Abstract The potential of MS‐SOFCs was demonstrated through the previous EU METSOFC project, which concluded that development oxidation resistant novel metal‐supported solid oxide fule cell (MS‐SOFC) design and stack is requirement to advance this technology next level. following METSAPP project has been executed with an overall aim developing advanced cells stacks based on a robust, reliable up‐scalable technology. During nanostructured anodes modified SrTiO 3 were developed integrated into...
Commercialization of SOFC technology is strongly relying on the establishment low cost, highly reliable and reproducible manufacturing processes. A major challenge in production chain manufacture single cells. Anode-supported planar SOFC's are layer structured, where each contains a complex microstructure. Successful such cell achievement optimal final properties very much dependant processing steps their interdependence. Therefore, order to improve performance as well reducing costs, it...
Many years of close collaboration between Topsoe Fuel Cell A/S (TOFC) and Risø (to day DTU Energy Conversion) on SOFC development have ensured an efficient transfer basic know how to industrial technology. The in the consortium includes material manufacturing materials, cells stacks based state art as well innovative strategies. Today TOFC provides technology platform: Cells, stacks, integrated multi stack module PowerCore units that integrate modules with hot fuel processing for high...
Anode-supported cells were fabricated with optimized cathodes showing high power density of at under a cell voltage and an active area . A microstructure study was performed on such using field-emission gun scanning electron microscope, which revealed that the (LSM) composite consist network homogenously distributed LSM, yttria-stabilized zirconia (YSZ), pores. The individual grain size LSM or YSZ is approximately degree contact between cathode electrolyte 39% average.
Metal-supported SOFCs are believed to have high potential for commercialization due lower material costs and higher robustness in fabrication operation. However, the development of cell is challenged by metal properties during fabrication, necessary operating temperatures, while retaining both energy output stability. The metal-supported SOFC design developed at Riso̸ DTU has been optimized an ASR value 0.62 Ωcm2 650 °C, a steady degradation rate 1.0% kh-1 demonstrated 3000 h on 16 cm2...