 Lithium-bromine cell |
| OF THE ILLUSTRATED EMBODIMENTS Referring now to FIG. 1, a lithium-bromine cell according to the ... |
|
| Film casette |
| What is claimed is: 1. A film cassette for containing film-sheets each having an engagement hole ... |
|
| Sealing structure for a machine for centrifugally casting pipes and machine including said structure |
| Having now described my invention what I claim as new and desire to secure by Letters Patent is: 1. ... |
|
| Seal and actuator for pipe testing |
| The present invention is related to the pressure testing of open-ended large diameter pipes. After ... |
|
| Sealing device |
| What is claimed is: 1. A device for sealing a gap between a first space and a second space wherein ... |
|
| Crosslinked acrylonitrile copolymers |
| What is claimed is: 1. A process for the production of crosslinked acrylonitrile copolymer ... |
|
| Crimping method for electrochemical cells |
| What is claimed is: 1. An improved method for sealing a cylindrical electrochemical cell having an ... |
|
| Cylindrical type dry battery and battery chamber |
| The foregoing first object is accomplished by a cylindrical type dry battery comprising: a first ... |
|
| Sodium-sulphur electric cell and method of forming same |
| What we claim is: 1. A method of producing a sodium-sulphur type electric cell, said cell ... |
|
| Feedthrough assembly for lithium-iron sulfide cell |
| In accordance with the present invention a feedthrough assembly is provided for use in an ... |
|
|
Electrochemical cells
| Details |
Inventors: Markin, Trevor Leslie; Bones, Roger John; Scott, Keith Taylor; May, Geoffrey John; Robinson, Graham;
Assignee: Chloride Silent Power Limited (London, GB2)
Primary Examiner: Skapars; Anthony
Assistant Examiner:
Attorney, Agent or Firm: Beveridge, DeGrandi, Kline & Lunsford
In a sodium-sulphur cell having a solid electrolyte separating sodium from a cathodic region containing sulphur/polysulphides in a graphite felt, a cathode current collector is formed of an aluminium substrate on which is an interstrate layer of nickel-chromium alloy covered by a coating of titanium oxide or other electronically conductive oxide intrinsically inert to the cathodic reactant. |
|
DETAILED DESCRIPTION It is one of the objects of the present invention to provide an improved form of cathode current collector for use in sodium-sulphur cells.
According to the present invention, in a sodium-sulphur cell having a solid electrolyte separating sodium forming the anode from a cathodic reactant comprising sulphur/polysulphides, there is provided a cathode current collector comprising an aluminum substrate with, over the surface of the substrate exposed to the cathodic reactant, an interstrate layer of a nickel-chromium alloy as hereinafter defined, and an outer coating over the interstrate layer of a plasma-sprayed or detonation-gun sprayed electronically conductive oxide inert with respect to the cathodic reactant.
Plasma-spraying techniques using a plasma-arc gun are well-known.
For applying the oxide coating, it is possible to use plasma-spraying or a detonation gun (D-gun) coating process.
This latter process operates by metering oxygen, acetylene and coating material into a firing chamber.
There are detonated by a spark to produce a hot (3300.
degree.
C), high speed 750 m/s gas stream which forces the particles against the substrate.
The advantages of the process are the good quality of the bond between coating and substrate and the ability to keep the substrate relatively cool (<150.
degree.
C) which avoids distortion or metallurgical changes.
Plasma-spraying by contrast has a higher temperature (.
about.
17000.
degree.
C) but lower particle velocities.
The nickel-chromium alloy may be a binary alloy of nickel or chromium but, more generally, it is an alloy containing at least 50% by weight of nickel and chromium together, each of these components comprising at least 10% by weight of the material, the major constituents, if any, apart from nickel and chromium, being iron and/or cobalt and possibly with minor proportions of one or more of the following materials; molybdenum, tungsten, niobium, aluminium, titanium, manganese, carbon and yttrium, the minor constituents totalling not more than 5% by weight
|
| Related patents |
|
|
Battery cathode and method of making same
To fabricate from MoS.sub.2 a battery cathode which comprises MoO.sub.2 as a cathode-active material, particles of MoS.sub.2 are oxidized to form MoO.sub.2 or MoO.sub.3....
|
|
|
Apparatus for crimping brush contacts
Having described in the invention what is claimed is: 1. In combination with a crimping apparatus of the type adapted to crimp one of the ends of a plurality of wires in ...
|
|
|
Fuel cell electrolyte supply system and apparatus
OF THE INVENTION In FIG. 1 of the drawings, I have diagrammatically illustrated my new system and apparatus related to the anode and ion exchange sections X and Y of ...
|
|
|
Method of producing furnace carbon black
OF THE INVENTION The invention is explained in more detail below in two embodiments with reference made to two advantageous reactor designs shown in the drawings. FIG. 1...
|
|
|
Protective interlayer for high temperature solid electrolyte electrochemical cells
The above problems have been solved and the above needs met, most generally, by providing a novel doped yttrium chromite, as an interlayer which is electrically ...
|
|
|
Separator for starved electrolyte lead/acid battery
OF THE INVENTION The articles utilizing the compositions of this invention are denominated "separators" for the starved electrolyte lead/acid batteries, following the ...
|
|
|
Storage of electrical energy with tin electrode system, storage apparatus, and method of forming such apparatus
According to the present invention, a novel system for storing electrical energy is provided which comprises simple and inexpensive construction materials. The system ...
|
|
|
Sealed lithium-type electrochemical cell
What I claim as new and desire to secure by Letters Patent of the United States is: 1. A sealed lithium electrochemical cell comprising a casing, an anode positioned ...
|
|
|
Lithium halide cell
Pursuant to the present invention, lithium-halide primary cells can be made having a variety of lengths utilizing a single mold. In a preferred method, the cathode and ...
|
|
|
Acid mixture for the electrolyte of a galvanic battery, and a method for producing said mixture
What is claimed is: 1. An electrolyte precursor composition for use in a galvanic battery in which the electrolyte flows as a liquid solution, said composition ...
|
|
|
Fuel Cells 
