A5014822470- Advancements in Solid Oxide Fuel Cells
- Fuel Cells and Related Materials
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Metal and Thin Film Mechanics
- Chromium effects and bioremediation
- Catalysis and Oxidation Reactions
- Thermal Expansion and Ionic Conductivity
- Gas Sensing Nanomaterials and Sensors
- Molten salt chemistry and electrochemical processes
- Radioactive element chemistry and processing
- Fiber-reinforced polymer composites
- Copper Interconnects and Reliability
- Semiconductor materials and devices
- Electrocatalysts for Energy Conversion
Forschungszentrum Jülich
2016-2018
Anode-supported solid oxide fuel cells with different Cr protection layers on the metallic interconnect were operated in a short stack at 700°C for 1240 h. The current density was raised sequentially from 0.5 A cm−2 during first 240 h of operation to 0.75 further 1000 After operation, (La,Sr)(Co,Fe)O3-δ (LSCF) cathode analyzed respect interaction by both wet chemical and microstructural methods. For equipped interconnects coated dense APS layer, amount range few μg. porous WPS coating...
A straightforward method for accelerated testing of Cr poisoning phenomena on mixed ionic and electronic conducting Solid Oxide Cell (SOC) air electrode materials was developed. Cr2O3-powder is with an organic matrix screen printed onto anode-supported button cells (La,Sr)(Co,Fe)O3-δ (LSCF) cathode. Then, a thermal treatment conducted to achieve the formation well-defined amount SrCrO4 cathode surface within only few hours. For proof concept, single cell measurements were done investigate...
As part of two different stack tests with four-plane short stacks and their intensive post-test characterization, varying diffusion-related degradation mechanisms were investigated. The first was a short-term test (~1250h) chromium evaporation protection layers on the air-side metallic interconnect frame second long-term endurance (~ 35,000h). For stack, planes coated manganese oxide layer applied by wet powder spraying (WPS), while other manganese–cobalt–iron spinel atmospheric plasma...
Abstract The thermal expansion of La 0.5 Sr Co 0.25 Fe 0.75 O 3 ( LSCF 55) is investigated both by first principles phonon calculations combined with the quasi‐harmonic approximation QHA ) and experimental approaches. Within framework , volumetric coefficient rhombohedral 55 calculated as α V ,GGA = 50.34 × 10 −6 K −1 . For comparison, lattice volume grain are measured in situ high‐temperature X‐ray diffractometer HT ‐ XRD ). An anisotropic a ,hex 10.89 c 21.18 obtained. ,HT‐XRD 43.17 In...
Solid Oxide Fuel Cell systems for stationary applications should exhibit low degradation (<< 1%/1,000h voltage loss) to ensure long-term operation (> 40,000h). The rather high temperature of SOFCs (≥ 700°C) is on the one hand beneficial oxygen conduction through ceramic-based electrolyte, but other all diffusion-related, energetically-driven mechanisms are also increased. This counts less gas diffusion processes more pronounced solid-state (surface, bulk, grain boundary). For...