Skip to Main content Skip to Navigation
Theses

Développement de piles à combustible en technologie planaire couches épaisses. Application à l'étude de dispositifs en configuration monochambre

Abstract : This work is devoted to the development of single chamber solid oxide fuel cells (SCFCs). The originality of this type of SOFC is the absence of physical separation between the anode and cathode compartments. A mixture of fuel (hydrocarbon) and oxidant (air) is injected into the device comprising the electrolyte and both electrodes of the cell. Their operating principle is based on the different catalytic activities of anode and cathode: ideally, the anode has to be active for the oxidation of fuel while the cathode should only present a strong electro-activity for oxygen reduction. This original configuration allows to overcome the problems of sealing contrary to conventional SOFC, and to avoid constraints on the thickness of the electrolyte according to the disposition of electrodes (coplanar or deposed on each sides of the electrolyte). This configuration leads to simplified design from a technological point of view and therefore to less expensive device.
In this study, the electrodes were deposited as thick layers by screen-printing on electrolyte support. Ceria-based electrolytes (in particular GDC and SDC) have been used to reduce the operating temperature of SOFC cell (compared to those with YSZ electrolyte). Electrodes with specific catalytic properties towards gas mixture were also studied: Ni - GDC or Ni - SDC cermets for the anode, and LSM, BSCF or SSC cathodes. The initial powders as well the screen-printed layers were characterised by various physical-chemical methods (X-ray diffraction, microstructure, chemical stability, electronic conductivity). Different cells have been developed and tested in a single-chamber reactor under air / propane mixtures. The influence of gaseous conditions (flow, composition) as well as the operating temperature on the performances of the cells has been studied. Considering our tests conditions, the performances were relatively weak (maximum density power of about 12 mW.cm-1). However this study confirms the validity of the SOFC single-chamber concept, and also allowed to develop know-how in the laboratory for further studies on this topic.
Document type :
Theses
Complete list of metadatas

Cited literature [4 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00392071
Contributor : Andrée-Aimée Toucas <>
Submitted on : Friday, June 5, 2009 - 2:36:20 PM
Last modification on : Wednesday, June 24, 2020 - 4:18:32 PM
Long-term archiving on: : Monday, October 15, 2012 - 11:56:24 AM

Identifiers

  • HAL Id : tel-00392071, version 1

Citation

Sorina-Nicoleta Udroiu. Développement de piles à combustible en technologie planaire couches épaisses. Application à l'étude de dispositifs en configuration monochambre. Sciences de l'ingénieur [physics]. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2009. Français. ⟨tel-00392071⟩

Share

Metrics

Record views

542

Files downloads

1881