 Method for catalyzing a fuel cell electrode and an electrode so produced |
| We claim: 1. A process for pre-wetting a conducting particle, hydrophobic bonded, substrate ... |
|
| Process for producing granulated catalyst for the synthesis of ammonia |
| OF THE INVENTION The process according to the present invention is performed in the following ... |
|
| Electric vehicle having multiple replacement batteries |
| OF THE DRAWINGS For a more complete understanding of the present invention and the advantages ... |
|
| Battery exchange system for electric vehicles |
| The present invention provides an integrated electric vehicle service station system for managing ... |
|
| Rechargeable battery apparatus |
| It is an object of the present invention to provide a rechargeable battery apparatus wherein, when ... |
|
| Vibratory welding of battery components |
| Briefly described, in one aspect the invention is directed to a method for joining together in ... |
|
| Method for assembling a cell employing a coiled electrode assembly |
| The invention relates to a method of assembling a cell employing a coiled electrode assembly ... |
|
| Storage battery housing on a mobile phone |
| IN view of this, the inventor of the present invention provides a novel structure for the storage ... |
|
| Fuel tank and battery combination structure |
| What is claimed is: 1. A fuel tank and battery combination mountable in select arrangements ... |
|
| Wheel drive assembly |
| We claim: 1. A wheel drive assembly (10), comprising: a spindle (14) having inner and outer ... |
|
|
Fuel cell, electrode for the cell and method of preparation thereof
| Details |
Inventors: Okada, Hideo; Mori, Toshikatsu; Mitsugi, Kouichi; Iwase, Yoshio; Kuroe, Satoshi; Takeuchi, Masato; Kamo, Tomoichi;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Walton; Donald L.
Assistant Examiner:
Attorney, Agent or Firm: Antonelli, Terry, Stout & Kraus
The present invention provides a molten carbonate type fuel cell comprising two electrodes as anode and cathode, an electrolyte plate and separators in a single unit and a battery of the unit cells stacked. The electrodes comprise a porous plate of an electron-conducting material such as nickel containing particles of ceramics such as magnesium oxide uniformly dispersed therein in an amount of 2 to 29 atomic %, except for the superficial thin portion free of the ceramic particles on the one-side surface of the plate. The electrodes are prepared by mixing a powder of the electro-conducting material with an organic binder under stirring to obtain a slurry or paste, deaerating the slurry or paste to remove entrained air bubbles therefrom, shaping the slurry or paste plate with or without a metal wire net, drying the electrode plate at room temperature and finally firing the plate in a reducing atmosphere. |
|
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The problems of the prior art molten carbonate type fuel cells can be overcome by providing an electrode as anode or cathode comprising a porous electron-conducting body containing ceramic particles uniformly dispersed therein but having a superficial thin portion free of the ceramic particles at the fuel or oxidizing gas-passing side of the body.
This electrode is made by making a porous plate of an electron-conducting material through a usual process, applying a water-repellent onto the surface of the porous plate allowed to face the fuel or oxidizing gas-passing side of a separator, impregnating the plate with a dispersion of a ceramic source, prefiring the plate in an oxidizing atmosphere and finally firing the plate in a reducing atmosphere.
The porous plate of an electron-conducting material is made by a usual process under "step of preparing a metal slurry or paste" 10 as defined in FIG.
2.
That is, a metal powder as a starting material is mixed with an organic binder 12 under stirring 13 for viscosity adjustment to obtain a slurry or paste, which is then deaerated under vacuum 14 to remove entrained air bubbles from the slurry or paste, thus obtaining a predetermined slurry or paste 16.
The metal powder is comprised of at least one metal selected from nickel, cobalt, copper, chromium and iron, mixtures or alloys thereof, and it is of 0.
1 to 10 .
mu.
m, preferably 1 to 5 .
mu.
m in particle size.
To the metal powder is added an organic binder and water, the mixture is kneaded to form a slurry or paste, which is deaerated to adjust the viscosity to 50 to 200 poises, preferably 100 to 200 poises.
The organic binder used herein may be, for example, carboxymethyl cellulose (CMC), hydroxyethyl cellulose (HEC), polyethylene oxide (PEO), polyvinyl alcohol (PVA) or polyvinyl butyral (PVB).
If the particle size of the metal powder is smaller than 0.
1 .
mu.
m, the sintering action is accelerated in the subsequent step of firing in a reducing atmosphere as mentioned below, so that the specific surface area of the electrode is conspicuously reduced, which causes cracks to be generated in the electrode
|
| Related patents |
|
|
Alkaline cells containing fluorescent dyes
OF THE INVENTION In one embodiment of the present invention, the fluorescent additive is a pyrene compound (commercially available from Magnaflux Corp., 7300 W. L...
|
|
|
Battery separator
We claim: 1. In a battery, having a battery plate and a battery separator, said separator having a top edge, a bottom edge and a first and a second side edge defining ...
|
|
|
Lock for insulated cord grip
I claim: 1. A locking electrical connector comprising a cable terminal and a cable clamp, said cable terminal having an insulating housing and having conductive ...
|
|
|
Battery charging system for marine propulsion unit
This invention is adapted to be embodied in a charging circuit for charging a plurality of batteries from a generating coil subject to reversing current flow. In ...
|
|
|
Battery clamp
I claim as my invention: 1. An improved battery clamp for use with top post and side terminal batteries in which a pair of opposed clamp portions are hingedly connected, ...
|
|
|
Potential connector
What is claimed is: 1. Potential connector where the insulated ends of several electrical lines are combined in one connector element, the connector having a plastic ...
|
|
|
Polyester production
We claim: 1. In a process for the production of a linear aromatic polyester which comprises: (a) esterifying at least one aromatic dicarboxylic acid with ethylene glycol ...
|
|
|
Sealed lithium-chlorine cell
What we claim as new and desire to secure by Letters Patent of the United States is: 1. A sealed lithium-chlorine cell comprises a casing, an anode positioned within the ...
|
|
|
Titanium/silver-containing cellulosic separator for electrochemical cells
We claim: 1. In an electrochemical generator, the combination of a positive silver electrode, a negative electrode, an alkaline electrolyte and a separator interposed ...
|
|
|
Acid extracted-alkalized/carbon catalyst support with coordination complex catalyst and method of manufacture
OF EMBODIMENTS As mentioned above, the treated activated carbon support of the present invention, onto which the coordination complex of transition metal is deposited, ...
|
|
|
Fuel Cells 
