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Liu, Taikai and Arnold, Johannes (2016) Improving atmospheric plasma sprayed electrolyte layers of solid oxide fuel cells by use of a powder separator. International Thermal Spray Conference & Exhibition 2016, 9.-12. Mai 2016, Shanghai, China.
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Abstract
In order to increase the performance of solid oxide fuel cells (SOFCs) the property of the electrolyte deposited by atmospheric plasma spraying (APS) has to be optimized concerning surface roughness and density. In this work, a dense YSZ coating with homogenous structure was realized on a NiO-YSZ anode which was supported by a porous metal substrate made of Crofer 22 H. A powder separator, which was able to diminish fluctuations of the in-flight particle stream, was used the first time to stabilize the APS process. During powder feeding a fully yttria-stabilized zirconia powder was on-line separated into two parts: a fraction of fine particles which were fed directly to the plasma, and a fraction of coarse particles which were collected and reused. The resulting coating exhibited a high homogeneity both in cross section and on surface. Validated by SEM images, the optimized coating did not possess any cracks and the porosity ratio was close to that found by vacuum plasma spraying (VPS) when two separators were employed. The gas leak rate shows an obvious increase of electrolyte performance compared to results without any powder separator.
| Item URL in elib: | https://elib.dlr.de/110531/ | |||||||||
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| Document Type: | Conference or Workshop Item (Speech) | |||||||||
| Title: | Improving atmospheric plasma sprayed electrolyte layers of solid oxide fuel cells by use of a powder separator | |||||||||
| Authors: |
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| Date: | 11 May 2016 | |||||||||
| Refereed publication: | No | |||||||||
| Open Access: | No | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | No | |||||||||
| In ISI Web of Science: | No | |||||||||
| Status: | Published | |||||||||
| Keywords: | Performance, SOFC, electrolyte, atmospheric plasma spraying, APS, YSZ coating, NiO-YSZ anode, metal substrate, Crofer 22 H, powder separator, fine and coarse particles. | |||||||||
| Event Title: | International Thermal Spray Conference & Exhibition 2016 | |||||||||
| Event Location: | Shanghai, China | |||||||||
| Event Type: | international Conference | |||||||||
| Event Dates: | 9.-12. Mai 2016 | |||||||||
| Organizer: | DVS – German Welding Society | |||||||||
| HGF - Research field: | Energy | |||||||||
| HGF - Program: | Storage and Cross-linked Infrastructures | |||||||||
| HGF - Program Themes: | Fuel cells | |||||||||
| DLR - Research area: | Energy | |||||||||
| DLR - Program: | E EV - Energy process technology | |||||||||
| DLR - Research theme (Project): | E - Electrochemical Processes (Fuel Cells) (old), E - Electrochemical Processes (Electrolysis) (old) | |||||||||
| Location: | Stuttgart | |||||||||
| Institutes and Institutions: | Institute of Engineering Thermodynamics > Electrochemical Energy Technology | |||||||||
| Deposited By: | Arnold, Dr.-Ing. Johannes | |||||||||
| Deposited On: | 12 Jan 2017 07:32 | |||||||||
| Last Modified: | 12 Jan 2017 07:32 |
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