 Lock with a double locking mechanism for a safe, bank compartment or the like |
| The present invention has for a purpose to obviate the need for such a special and necessarily ... |
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| Bayonet joint backset adjustment for latch constructions |
| It is, therefore, an object of this invention to provide a latch construction of the type for doors ... |
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| Deadbolt |
| The present invention is directed to a deadbolt lock unit which incorporates a novel retention and ... |
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| Q-Switched laser with stable output and method of making the same |
| In its basic concept, this invention provides a Q-switched laser of high stability by synchronizing ... |
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| Semiconductor laser device |
| In view of the above described related art, an object of the present invention is to provide an AlG... |
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| High power laser employing an unstable resonator |
| What is claimed is: 1. In a high power laser: a positive branch unstable optical resonant cavity; a ... |
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| Unstable optical resonator with cancelling edge waves |
| What is claimed is: 1. In an unstable optical resonator having an optical axis, an output mirror ... |
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| High-energy laser system having gyroscopically stabilized optical elements |
| The present invention overcomes these and other disadvantages, and provides mechanical wave energy ... |
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| Slab geometry laser material with concave edges |
| In FIG. 2 is shown a slab (substantially rectangular) geometry laser medium 10 having pump faces 12... |
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Electrochemical cell containing sulphur dioxide as cathodic depolarizer
| Details |
Inventors: Xenzhek, Oktavian S.; Shembel, Elena M.; Litvinova, Valentina I.; Martynenko, Tamara L.; Raikhelson, Leonid B.; Sokolov, Leonid A.; Moskovsky, Valentin Z.;
Assignee: Dnepropetrovsky Khimiko-Tekhnologichesky Institut Imeni F.E. (Dnepropetrovsk, SU)
Primary Examiner: Walton; Donald L.
Assistant Examiner: Kalafut; Stephen J.
Attorney, Agent or Firm: Burgess, Ryan & Wayne
The electrochemical cell according to the present invention comprises an anode of a metal capable of reducing sulphur dioxide, an inert porous cathode with the electron-type conductivity, preliminarily anodically polarized to a potential of from 4.5 to 4.7 V relative to a lithium electrode, and a non-aqueous electrolyte containing sulphur dioxide as a cathodic depolarizer, at least one aprotic organic solvent with a donor number of from 20 to 50, and an electrolyte salt which is inert relative to sulphur dioxide and the anode metal. |
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DETAILED DESCRIPTION OF THE INVENTION The electrochemical cell according to the present invention comprises an anode made of a metal capable of reducing sulphur dioxide, a cathode of a porous material inert to sulphur dioxide but wherein the latter could be reduced.
The anode and the cathode are immersed in a non-aqueous electrolyte containing sulphur dioxide as a cathodic depolarizer, an aprotic solvent and an electrolyte salt inert to sulphur dioxide and to the anode metal.
As the anode is made of a metal which has a more negative potential in non-aqueous systems than sulphur dioxide.
The most preferred metals are sodium and lithium having high activity and a lower equivalent weight and substantially inactive with respect to sulphur dioxide.
The cathode can be made of any substance with the electron-type conductivity, inert relative to sulphur dioxide, but whereupon it can be reduced.
"Inertness" means the absence of interaction between the material and SO.
sub.
2, i.
e.
the absence of chemical oxidation, physical destruction, or deposition.
It is preferable to use a carbonaceous material for the cathode which can be made by any conventional method.
Usually, during the electrochemical reduction of SO.
sub.
2 there is deposition of an insoluble product on the cathode, which hinders its further reduction.
For this reason, use is made of a cathode with a large surface area.
It has been found that if a cathode is preliminarily anodically polarized to a potential of from 4.
5 to 4.
7 V relative to the lithium electrode, there is improvement of specific characteristics of the electrochemical cell due to better parameters of the cathodic process.
A porous graphite electrode produced by any conventional method is subjected to an electrochemical anodic polarization in a non-aqueous electrolyte consisting of propylenecarbonate, 1 M LiClO.
sub.
4, and 12% by mass of SO.
sub.
2.
FIG.
1 shows typical curves illustrating the principle of electrochemical anodic activation of the electrode.
Curve 1 corresponds to a cathodic galvanostatic curve on an electrode not subjected to the activation
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Fuel Cells 
