SU783364A1 - Bipolar electrode - Google Patents

Description

The invention relates to devices for producing hydrogen and oxygen by electrolysis of water, in particular, to the construction of bipolar electrodes of a filterpress type electrolyzer.

A bipolar electrode used in the electrolysis of water is known, comprising a main sheet and two remote electrodes made of metal wire mesh placed on two opposite sides of the main sheet and connected with it by anchors 1.

A disadvantage of the known bipolar electrode is that the remote electrodes from the wire mesh are attached to the base sheet with one central anchor. Since a reliable electrical contact is provided in the metal mesh between the individual wires, one part of the wires does not participate in the electrolysis process, since no electric current passes through it, and an increased current density takes place on the other part of the wires, this leads to an increase in overvoltage method of gas emission on remote electrodes

And to an increase in electricity consumption to obtain a unit volume of gases. The aim of the invention is to reduce the power consumption of electrolyzed water.

This is achieved by using a bipolar electrode comprising a main sheet and two remote electrodes made of metal

wire mesh, placed on two opposite sides of the main sheet and connected to nsh.1 anchors, with the ends of the metal wire

 5 grids ryeky ryeky connected to each other.

FIG. 1 shows the proposed bipolar electrode; in fig. 2 2Q raere A-A in FIG. one.

Claims (1)

The bipolar electrode contains the main sheet 1 and two remote electrodes 2 and 3, located {on either side of the main sheet 1 and connected to it using anchors 4 and 5. The external 25 electrodes 2 and 3 are made of metal wire mesh with 1. interlacing . The greatest active surface is provided by a grid, Q which does not have a lumen in the perpendicular direction, for example, a mesh.glad filter according to GOST 3187-76. The remote electrode 2, which serves as the cathode, is made of steel mesh; and the external electrode 3, which serves as the anode, is made of a nickel grid or of a steel nickel-plated grid. ; The ends of the wires of the metal mesh are connected to each other along the perimeter of the external electrodes by any known method that ensures reliable electrical contact. The most suitable way is to connect the ends of the wires with a weld seam 6, obtained, for example, by resistance electric welding. The number of anchors 4 and 5 is selected from the conditions of the current load on the anchors and the rigidity of the external elec- trodes 2 and 3. The connection of the external electrodes with the main sheet is made by any known method (screws, contact welding, gas-shielded welding, etc.). The proposed bipolar electrodes are used in filter press type electrolyzers for decomposing water in which they alternate with separating diaphragms permeable to electrolyte and gas-impermeable. Bipolar electrodes or separation diaphragms are mounted in ring frames that, when assembled with an S bag, use end plates to form an enclosed space. When an electric constant tca is reached at the ends of the electrolyzer and when electrolyte is electrolyte, hydrogen is released in the inner space at the remote electrons 2, which serve as cathodes, and oxygen at the remote electrodes 3, which serve as anodes. At the same time, gas bubbles pass freely through the grid into the space between the main sheet and the external electrode and are removed from the electrolyzer. The connection of the ends of the wires of the metal mesh around the perimeter of the external electrode by a welded seam ensures uniform distribution of electric current over its entire area, and thus contributes to the maximum use of the geometric surface of the external electrode for electrolysis of water. This reduces the current density on the external electrodes, reduces the power consumption during the electrolysis of water and increases the durability of the electrodes. . Bipolar electrode used in the electrolysis of water, including the main sheet and two remote electrodes made of metal wire mesh, placed on two opposite sides of the main sheet and connected to it by anchors, which is characterized by the fact that in order to reduce consumption electricity during the electrolysis of water, the ends of the wires of the metal grid are electrically connected between themselves. Sources of information taken into account in the examination 1. UK patent number 1145751, cl. C 7 V, 11.05.66 (prototype). 3A-A5 / - ,, ./ ... K / HHChchchch1ch1chchchchchchchch1chchchchchchchchchchchchchchchchchchchchchch Iill yI 1lit I I IiiI 1 Js YY 2Fig. 2