CH438438A - Method of manufacturing a nickel anode for solid electrolyte fuel cells - Google Patents
Method of manufacturing a nickel anode for solid electrolyte fuel cellsInfo
- Publication number
- CH438438A CH438438A CH882465A CH882465A CH438438A CH 438438 A CH438438 A CH 438438A CH 882465 A CH882465 A CH 882465A CH 882465 A CH882465 A CH 882465A CH 438438 A CH438438 A CH 438438A
- Authority
- CH
- Switzerland
- Prior art keywords
- solid electrolyte
- nickel
- manufacturing
- fuel cells
- electrolyte fuel
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/90—Selection of catalytic material
- H01M4/9041—Metals or alloys
- H01M4/905—Metals or alloys specially used in fuel cell operating at high temperature, e.g. SOFC
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Description
Procédé de fabrication d'une anode en nickel pour piles à combustible à électrolyte solide La présente invention a pour objet un procédé de fabrication d'une anode en nickel pour piles à combus tible à électrolyte solide.
On peut utiliser le nickel pour anode d'une pile à combustible à électrolyte solide, notamment sous forme d'une couche poreuse déposée sur l'une des faces de l'électrolyte. La porosité de cette couche doit être suf fisante pour permettre, d'une part, l'accès du combus tible près de l'interface électrolyte-anode, c'est-à-dire à la zone de combustion électrochimique et, d'autre part, l'évacuation des produits de cette combustion électro chimique. Or, l'électrolyte solide, qui doit être étanche, présente des faces très lisses, ce qui rend l'obtention d'une couche poreuse, par dépôt sur une de ces faces, très difficile.
En effet, une couche déposée sur une telle face étant très mince, elle présentera le même état de la surface, surtout du côté de l'électrolyte.
Le procédé selon la présente invention permet d'ob tenir une anode en nickel très poreuse. Il est caractérisé par le fait que l'on dépose, par décomposition thermique du tétracarbonyle de nickel, une couche de nickel sur la face de l'électrolyte solide que l'on a préalablement ren due poreuse sur une épaisseur désirée.
La face de l'électrolyte sur laquelle on doit déposer la couche de nickel destinée à former l'anode peut être rendue poreuse sur l'épaisseur désirée soit après soit lors de la fabrication de l'électrolyte. Ainsi, dans le cas d'un électrolyte à base d'oxyde de zirconium, elle peut être réalisée après, par exemple par frittage. La couche de nickel déposée sur une face poreuse épousera les aspé rités de celle-ci et sera donc également poreuse.
<I>Exemple</I> L'électrolyte sur lequel on doit déposer une couche de nickel destinée à former l'anode, est un disque d'oxy de mixte ZrO2 -!- Yb203 (92'% mole+8 % mole) ayant un diamètre de 2,8 cm et une épaisseur de 0,l4 cm et dont une face est rendue poreuse sur une épaisseur de 0;05 cm.
On place ce disque dans un récipient approprié sur une plaque chauffante, la face poreuse en haut et on chauffe celle-ci à 1800 C. Sur la face poreuse du dis- que on dirige, pendant 30 minutes,
un mélange de 45 % d'azote et 55 % de tétracarbonyle de nickel avec un débit de 700 cms par minute. On obtient une couche poreuse de nickel dont la résistance électrique, mesurée du centre du disque à un contact annulaire dont le dia mètre intérieur est de 2,7 cm, est de 0,16 ohm.
Method of manufacturing a nickel anode for solid electrolyte fuel cells The present invention relates to a method of manufacturing a nickel anode for solid electrolyte fuel cells.
Nickel can be used for the anode of a solid electrolyte fuel cell, in particular in the form of a porous layer deposited on one of the faces of the electrolyte. The porosity of this layer must be sufficient to allow, on the one hand, the access of the fuel near the electrolyte-anode interface, that is to say to the electrochemical combustion zone and, on the other hand. part, the evacuation of the products of this electrochemical combustion. However, the solid electrolyte, which must be waterproof, has very smooth faces, which makes obtaining a porous layer, by deposition on one of these faces, very difficult.
Indeed, a layer deposited on such a face being very thin, it will have the same state of the surface, especially on the electrolyte side.
The method according to the present invention makes it possible to obtain a very porous nickel anode. It is characterized by the fact that, by thermal decomposition of nickel tetracarbonyl, a layer of nickel is deposited on the face of the solid electrolyte which has previously been made porous to a desired thickness.
The face of the electrolyte on which the layer of nickel intended to form the anode must be deposited can be made porous to the desired thickness either after or during the manufacture of the electrolyte. Thus, in the case of an electrolyte based on zirconium oxide, it can be carried out afterwards, for example by sintering. The layer of nickel deposited on a porous face will match the roughness of the latter and will therefore also be porous.
<I> Example </I> The electrolyte on which we must deposit a layer of nickel intended to form the anode, is an oxy disc of mixed ZrO2 -! - Yb203 (92 '% mole + 8% mole) having a diameter of 2.8 cm and a thickness of 0.14 cm and one side of which is porous to a thickness of 0.05 cm.
This disc is placed in a suitable container on a hot plate, the porous side up and the latter is heated to 1800 C. On the porous side of the disc is directed, for 30 minutes,
a mixture of 45% nitrogen and 55% nickel tetracarbonyl with a flow rate of 700 cms per minute. A porous layer of nickel is obtained, the electrical resistance of which, measured from the center of the disc to an annular contact with an internal diameter of 2.7 cm, is 0.16 ohm.
Claims (1)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH882465A CH438438A (en) | 1965-06-24 | 1965-06-24 | Method of manufacturing a nickel anode for solid electrolyte fuel cells |
CH845666A CH517383A (en) | 1965-06-24 | 1966-06-10 | Solid electrolyte - electrode assembly for fuel cells - contg a gas-impermeable layer and a porous layer coated with nickel |
DE19661596013 DE1596013A1 (en) | 1965-06-24 | 1966-06-21 | Electrolyte / electrode unit for fuel elements and process for their production |
GB27837/66A GB1146483A (en) | 1965-06-24 | 1966-06-22 | Improvements in or relating to electrolyte-electrode assemblies for cells |
NL6608734A NL6608734A (en) | 1965-06-24 | 1966-06-23 | |
BE683076D BE683076A (en) | 1965-06-24 | 1966-06-24 | |
FR66802A FR1484476A (en) | 1965-06-24 | 1966-06-24 | Electrolyte-electrode assembly for solid electrolyte fuel cells |
US565084A US3442713A (en) | 1965-06-24 | 1966-07-14 | Combined electrolyte-electrode for fuel cells and method of fabrication |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH882465A CH438438A (en) | 1965-06-24 | 1965-06-24 | Method of manufacturing a nickel anode for solid electrolyte fuel cells |
Publications (1)
Publication Number | Publication Date |
---|---|
CH438438A true CH438438A (en) | 1967-06-30 |
Family
ID=4345144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH882465A CH438438A (en) | 1965-06-24 | 1965-06-24 | Method of manufacturing a nickel anode for solid electrolyte fuel cells |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH438438A (en) |
-
1965
- 1965-06-24 CH CH882465A patent/CH438438A/en unknown
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