| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chen, Ming
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2024A numerical investigation of nitridation in solid oxide fuel cell stacks operated with ammoniacitations
- 2022Planar proton-conducting ceramic cells for hydrogen extractioncitations
- 2021Ni migration in solid oxide cell electrodes: Review and revised hypothesiscitations
- 2020Review of Ni migration in SOC electrodes
- 2019Deposition and Electrical and Structural Properties of La0.6Sr0.4CoO3 Thin Films for Application in High-Temperature Electrochemical Cellscitations
- 2019Comprehensive Hypotheses for Degradation Mechanisms in Ni-Stabilized Zirconia Electrodescitations
- 2019A 4 × 4 cm2 Nanoengineered Solid Oxide Electrolysis Cell for Efficient and Durable Hydrogen Productioncitations
- 2018Sintering of MnCo2O4 coatings prepared by electrophoretic depositioncitations
- 2018Diffusion rates of reactants and components in solid oxide cells
- 2017Modeling of Ni Diffusion Induced Austenite Formation in Ferritic Stainless Steel Interconnectscitations
- 2017A Contribution to the Understanding of the Combined Effect of Nitrogen and Boron in Grey Cast Ironcitations
- 2017Corrosion study of ceria protective layer deposited by spray pyrolysis on steel interconnectscitations
- 2016Effects of strong cathodic polarization of the Ni-YSZ interfacecitations
- 2016Low temperature processed MnCo2O4 and MnCo1.8Fe0.2O4 as effective protective coatings for solid oxide fuel cell interconnects at 750 °Ccitations
- 2015Modeling of Ni Diffusion Induced Austenite Formation in Ferritic Stainless Steel Interconnectscitations
- 2014Influence of Mn-Co Spinel Coating on Oxidation Behavior of Ferritic SS Alloys for SOFC Interconnect Applications
- 2014Optimization of Ferritic Steel Porous Supports for Protonic Fuel Cells Working at 600°C
- 2014TOF-SIMS characterization of impurity enrichment and redistribution in solid oxide electrolysis cells during operationcitations
- 2014Ceria based protective coatings for steel interconnects prepared by spray pyrolysiscitations
- 2014Oxidation study of coated Crofer 22 APU steel in dry oxygencitations
- 2013High Temperature Oxidation of Ferritic Steels for Solid Oxide Electrolysis Stackscitations
- 2013Transmission Electron Microscopy Specimen Preparation Method for Multiphase Porous Functional Ceramicscitations
- 2012Durable and Robust Solid Oxide Fuel Cells
- 2012Improved oxidation resistance of ferritic steels with LSM coating for high temperature electrochemical applicationscitations
- 2012Efficient dual layer interconnect coating for high temperature electrochemical devicescitations
- 2011Electrical conductivity of Ni–YSZ composites: Degradation due to Ni particle growthcitations
- 2010Corrosion stability of ferritic stainless steels for solid oxide electrolyser cell interconnectscitations
- 2009Thermodynamic Assessment of the La-Cr-O Systemcitations
- 2009Thermodynamic assessment of the La-Fe-O systemcitations
Places of action
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article
Electrical conductivity of Ni–YSZ composites: Degradation due to Ni particle growth
Abstract
The short-term changes in the electrical conductivity of Ni–YSZ composites (cermets) suitable for use in Solid Oxide Fuel Cells (SOFC) were measured by an in-situ 4-point DC technique. The isothermal reduction was carried out in dry, humidified or wet hydrogen at temperatures from 600 to 1000°C. While the cermets reduced at 600°C showed a stable conductivity of 1000–1200S/cm, rapid initial conductivity loss was observed at elevated temperatures. At 1000°C the conductivity degraded nearly instantaneously to about 800S/cm, and continued to decline fast to about 400S/cm. At 850°C, the presence of steam did have an accelerating effect on the conductivity loss. Scanning Electron Microscopy of cermets reduced in different conditions showed increasing particle size and loss of metal-to-metal percolation in the samples reduced at higher temperatures. The short-term changes in conductivity were modelled using two different semi-empirical approaches. Thermodynamic calculations were carried out to assess the vaporisation of Ni in the conditions tested. The rate and mechanisms of conductivity degradation due to Ni particle growth are discussed in light of the measurements, modelling and literature data.