SU546299A3 - Bipolar electrode for a chemical current source of a halide-metal system - Google Patents

Description

(54) BIPOLAR ELECTRODE FOR CHEMICAL SOURCE OF CURRENT HALID-METAL SYSTEM

one

The invention relates to the electrical industry and can be used in chemical current sources of a halide-metal system.

A bipolar electrode is known for a chemical current source of a halide-metal system comprising a porous cathode connected to the anode.

The disadvantage of such an electrode is the formation of gas plugs in places where electrolyte passes, making it difficult for the electrode to work.

The closest in technical essence and achievable results is a bipolar electrode for a chemical current source of a halide-metal system containing a porous cathode connected to the anode and vertical channels 2. The channels serve to ensure the effective removal of hydrogen formed on the anode surface and completely isolated from electrolyte. Thus, the electrolyte is not able to flow from the channels into the space between the electrodes, which reduces the reliability of the current source.

The purpose of the invention is to increase reliability.

This is achieved by the fact that the vertical channels are located on the inner side of the cathode facing the anode, and the channels can be closed at one end.

FIG. 1 shows two interconnected electrodes; in fig. 2 - electrode, side view from the side of the anode; in fig. 3 - the same, top view; in fig. 4 - section A-A in FIG. one.

The electrode contains a gas-permeable and electrolyte wall 1 made of graphite and located vertically, on the outer surface of which, after charging or charging the current source, there is a coating or electroplating layer 2 of a highly electrically-positive metal, such as zinc, which serves as the anode. The inner surface of the impermeable wall is glued to part 3, which is the base of the porous cathode, by means of an electrically conductive adhesive layer 4 consisting of a polymer resin.

The electrode has many vertical channels 5 through which electrolyte can flow from the bottom to the top of the electrode.

Since there are pores in the cathode that run from the inner part near the vertical channels to the outer part facing the reactive part of the cathode, the electrolyte pumped into the pipe 6 by the pump penetrates the cathode 3 n holes into the reaction zone 7. Due to the pressure created by the pump The electrolyte flow is directed vertically upward and into the tubing - the collector 8, in which it is mixed with other electrolytes from other elements, and after it has been enriched, the chlorine chlorine is recirculated through the electrodes. The wall is relatively impermeable compared to the porous electrode. The electrolyte may leak through the impermeable wall over time, but the flow rate through the impermeable wall is substantially less than through the no-wall side.

The inner surface 9 of the porous carbon cathode 3 is kept in continuous contact with the dissolved chlorine in the electrolyte passing through the porous cathode into the reactive zone. There is no boundary layer of a stagnant electrolyte that would isolate the electrode surface from chlorine, which could be the case if it entered the cell only in the lower part of the reaction zone.

Due to the flow of excess electrolyte into the channels 5, they are kept full during the whole time, the formation of a stagnant electrolyte on the porous carbon cathode and the halogen deficiency on part of the upper surface are prevented, the desired direction of electrolyte flow is also prevented and unwanted reverse flow is prevented, the amount of electrolyte can be regulated by appropriate means.

A number of the described electrodes can be connected together by series connection into a battery with an interval between them for the passage of electrolyte.

Arrows 10 indicate the passage of electrolyte through porous coal, which is uniform from the bottom to the top. Arrows 11 (decrease in size as they rise) show a decrease in the amount of electrolyte flowing in channels 5. Arrows 12 show a correspondingly increasing amount of electrolyte in the reaction zone 7.

Claims (2)

1. A bipolar electrode for a chemical current source of a halide-metal system, comprising a porous cathode connected to the anode, and vertical channels, characterized in that, for the purpose of inoculation reliability, the channels are located on the inner side of the cathode, facing the anode. 2. A bipolar electrode according to claim 1, characterized in that the channels are blocked at one end. Sources of information taken into account in the examination: 1. Bagotsky V.S. and others. “Recent advances in the field of chemical sources current, 1963, p. 140, 141. 2. US patent number 3382102 class 136-30 from 1968. Rig i nnnnnnririririn ill llii ili i  ii i I i | l | Illlil iii I i | I jl I I. 11 I I I Ill III | i II , I M | l l | II | l il II ,, ,, ,,,, I I II IKII II II II II I V f J u2 five - yyyy C t-g- | -g-LT- / -Lj-ij / / : r-v - .-. t-r. .-Vi7 -.--. I ----. .. -. .-: - - -j. l v : - - -: - - :: i: - .-: .-. - -f. ., J. -. . -..... s. , -: “-.