Characterization of core-shell structured Ni@GDC anode materials synthesized by ultrasonic spray pyrolysis for solid oxide fuel cells
| Autor: | Ki-Tae Lee, Chae-Hyun Lim |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Process Chemistry and Technology Non-blocking I/O Oxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode Volumetric flow rate chemistry.chemical_compound chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Particle Solid oxide fuel cell Ceramic Composite material 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Ceramics International. 42:13715-13722 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2016.05.170 |
| Popis: | Core-shell structured NiO@GDC powders with NiO cores and GDC shells were synthesized by ultrasonic spray pyrolysis (USP) with a four-zone furnace. The morphology of the as-synthesized powders can be modified by controlling parameters such as the precursor pH, carrier gas flow rate, and zone temperature. At high carrier gas flow rates, the as-synthesized core-shell structured NiO@GDC powders have raisin-like morphology with a rough surface; this is due to fast gas exhaustion and insufficient particle ordering. The core-shell structured Ni@GDC anode showed considerable electrochemical performance enhancement compared to the conventionally-mixed Ni-GDC anode. The polarization resistance (R p ) of conventionally-mixed Ni-GDC anodes increases gradually as a function of the operation time. Alternatively, the core-shell structured Ni@GDC anode synthesized by USP does not exhibit any significant performance degradation, even after 500 h of operation. This is the case because the rigid GDC ceramic shell in the core-shell structured Ni@GDC may restrain Ni aggregation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect