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Constrained and non-constrained sintering of plasma-sprayed zirconia based electrolytes for SOFCs

Christenn, Claudia and Ansar, Asif (2010) Constrained and non-constrained sintering of plasma-sprayed zirconia based electrolytes for SOFCs. 12th International Ceramics Congress, June 6-11, 2010, Montecatini Terme, Pistoia, Italy.

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Abstract

The current development in SOFCs is focused on reducing the operating temperature below 800°C. The reduced operating temperature promotes durability of cells and decreases stringent demands on peripheral components. However, with lower temperature the ionic conductivity of electrolytes decreases. Thickness reduction of the conventionally used yttria-stabilized zirconia electrolyte by using nanostructured particles as feedstock is a possibility to avoid this problem. Another possibility is the use of an electrolyte with improved ionic conductivity for intermediate temperature SOFCs, e.g. scandia-stabilized zirconia. Within this work zirconia based electrolyte layers were deposited on metal substrates using plasma spraying. As all thermal sprayed coatings contain some porosity, which influences the cell performance, the sprayed electrolyte layers were sintered in a second step. Plasma-sprayed coatings were under compressive stresses. In order to achieve a better understanding of differences in the sintering behaviour, plasma sprayed layers were sintered under constrained and non-constrained conditions in the temperature range of 800 to 1520 °C and characterised. Sintering properties, microstructure, and conductivity of sprayed and sintered electrolyte layers were investigated.

Item URL in elib:https://elib.dlr.de/65838/
Document Type:Conference or Workshop Item (Speech)
Title:Constrained and non-constrained sintering of plasma-sprayed zirconia based electrolytes for SOFCs
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Christenn, ClaudiaDLR TTUNSPECIFIED
Ansar, AsifDLR TTUNSPECIFIED
Date:June 2010
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:YSZ, Electrolyte, SOFC, Sintering, Plasma spraying
Event Title:12th International Ceramics Congress
Event Location:Montecatini Terme, Pistoia, Italy
Event Type:international Conference
Event Dates:June 6-11, 2010
Organizer:CIMTEC
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E BZ - Fuel cells (old)
DLR - Research area:Energy
DLR - Program:E BZ - Fuel cells
DLR - Research theme (Project):E - Hochtemperatur-Brennstoffzellen (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Christenn, Claudia
Deposited On:23 Nov 2010 13:05
Last Modified:23 Nov 2010 13:05

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