SU44969A1 - Method of making positive electrodes for electroplated elements with air depolarization - Google Patents

Description

The proposed method of making positive electrodes for electroplating cells with air depolarization is aimed at obtaining the cheapest and most practical source of electrical energy both for storing it in batteries and for direct operation in radio networks (charging radio batteries for expeditions, deaf localities, etc.), telephone, telegraph and other installations, as well as for industrial purposes.

The positive electrode of an electroplating element with air depolarization is coal, covered with a thin layer of activated carbon in the form of plates of usual sizes, immersed in a 20 or 30% solution of ammonia. The electrolyte can also be a solution of acidified (hydrochloric or sulfuric acid) water, magnesium sulfate or chloride, zinc, sodium chloride, etc. The zinc electrode in the form of a plate or low ring with insulated contact lies at the bottom of the flat box or jar. . -.

To produce a positive electrode, a coal plate with rounded edges is taken to Is of its length, tightly

(223)

wrapped (three or four times) with cotton material (gauze, calico, calico, cotton), which was previously soaked), and then strongly squeezed with an adhesive mixture following; its composition: powdered sugar (or molasses and starch) -800 g is poured with a concentrated solution zinc chloride 200 g and left for a day, after which it is mixed with powders of finely abraded retro-graphite 140 g, activated carbon black 20 g, and manganese-acid potassium 10 g with the addition of 1000 cm of water. After the wrapping, the coals are dried until the glue hardens and then slowly burned in the sand without access of air until the layer is completely charred. The device, enlarged, its effective surface is that the coal crust is wrapped once or twice, but not more, with an outer sheath of rare hygroscopic matter, such as gauze, which fits the surface of the porous coal tightly and is held by several turns of the thin flap . The finished electrode is washed in a solution of hydrochloric acid and compressed with oil; e is lightly pressed to remove air under the layer.

In order to obtain the largest air surface available, a group of 5-10 flat electrodes is drawn by a common copper rod passed through the holes in the heads of the coal and the meleda gaskets from pieces of the same coal to separate the coal from each other by approximately 0.5-1 cm. a coiled battery (or a wall with rubber rings) of coals with a common terminal is placed lying on the edge of a glass in a plastic polyzinc cuvette or a waxed wooden box with a zinc plate on the bottom of it, and cases are gaskets of the glass tube of 1 cm. The electrolyte is poured in an amount such that the positive electrode was immersed in it for no more than one-third. In this way, aeration of wet ribs to three-quarters of the entire active surface of the coals is achieved. By using higher insulation pads, the amount of electrolyte increases, thereby increasing the capacity of the cell. You can also hang the electrodes vertically in the upper part of an ordinary elemental can with a zinc ring on the bottom. In the same bank, you can install a carbon cylinder or a group of electrodes of circular arc coal coated with activated carbon

above method. In the case of a lack of salts in the electrolyte during its operation, salts, zincates and oxides may appear, the formation of which should not be allowed.

The subject matter of the invention.

Claims (4)

1. A method of making positive electrodes for electroplating cells with air depolarization, wherein first the carbon plate is wrapped with cotton material impregnated with an adhesive mixture containing an active carbonaceous composition, then dried until the glue hardens, and then slowly burned without air. 2.B method according to claim. 1 use as a sticky composition of a concentrated solution of zinc chloride, containing powdered sugar, molasses or starch. 3. In the method according to claim 1, use as a carbonaceous composition a powdered mixture of retort carbon, activated carbon black and manganic acid potassium. 4. Application for electrodes made according to claims. 1 to 3, in order to increase their effective surface, the outer shell of hygroscopic matter.