JPS636213Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a liquid-permeable electrolytic cell, and more particularly to a two-component redox type battery using a liquid-permeable electrode, such as a felt-like electrode.

[Prior art]

FIG. 4 shows a disassembled state of a conventional liquid-permeable electrolytic cell 1, in which an ion exchange membrane 5 is arranged between the partition plates 2 and 2' at both ends, and between the ion exchange membrane 5 and the partition plate 2. Frames 3, 3' are further arranged, and an electrode frame 4 is arranged between the frames 3, 3', and similarly, frames 3'', 3, and an electrode frame 4 are arranged between the ion exchange membrane 5 and the partition plate 2'. ' is placed.

Each component of these electrolytic cells is stacked and fixed together to form one electrolytic cell, and the electrode frame 4
The frame spaces 4' and 4' were filled with liquid permeable electrodes 6 and 6', respectively.

FIG. 5 shows an exploded longitudinal cross-sectional view of such a conventional electrolytic cell.

Here, the partition plates 2, 2' are made of a conductive material such as a carbon plate, a graphite plate, a carbon plastic, etc., and the frames 3, 3', 3'', 3 and the electrode frames 4, 4'
The material is a resin such as polyvinyl chloride, polyethylene, or epoxy resin, and the electrode is a porous electrode with liquid flow, that is, a metal felt with a thickness of about 0.5 mm to 10 mm, a laminate of metal mesh, carbon felt, Liquid permeable electrodes such as carbon cloth and porous carbon were used.

Further, as the ion exchange membrane 5, a cation exchange membrane or the like is used, and the ion exchange membrane must have a function of preventing mixing of the anolyte and catholyte and be ion conductive.

The dimensions of the electrode are approximately 18 cm in width and 24 cm in height, with electrode frame 4
The electrodes can be sufficiently fixed by pasting them with a silicone adhesive or by simply stacking each component and physically pressing down on the electrodes.

One of the portions formed between the intermediate ion exchange membrane 5 and the partition plate 2 and the portion between the ion exchange membrane 5 and the partition plate 2' is used as an anode chamber and the other as a cathode chamber, for example. As shown in FIG. 4, the anolyte supplied to the electrode frame 4 through the supply holes of each member along the arrow a reaches the electrode 6 through the slit S formed in the electrode frame, and then reaches the electrode 6 in the direction of the arrow A. It is electrolyzed while flowing from slit S' to arrow b and
It is discharged along b′.

A portion of the anolyte is discharged along arrow a' without being electrolyzed and is similarly supplied to the next electrolytic cell.

On the other hand, the catholyte is similarly supplied along the arrow d, electrolyzed by the electrode 6' while flowing in the direction of the arrow B, and discharged along the arrows e and e'.

A portion of the catholyte is not electrolyzed but is discharged along arrow d' and is likewise supplied to the next electrolytic cell.

By the way, in such a liquid permeable electrolytic cell, it is necessary to flow the electrolytic solution uniformly into the electrode in order to improve the electrolytic efficiency, but in an electrolytic cell that is long in the vertical direction or large in the width direction, the sixth As shown in the figure, the electrolyte flows from the anolyte inlet side flow hole 7 to the anolyte outlet side flow hole 8 in the direction of arrow C, which creates a portion D where the electrolyte tends to stagnate, resulting in the disadvantage that side reactions are likely to occur. Therefore, it was difficult to put a large electrolytic cell into practical use.

Therefore, in the past, a large number of small electrolytic cells with an effective electrode area of several hundred cm ² per electrolytic cell were manufactured, and an arbitrary number of electrolytic cells were connected in series or in parallel depending on the purpose.

However, such miniaturization of electrolytic cells results in a decrease in the effective utilization of the electrolytic cell constituent materials, an increase in manufacturing man-hours due to an increase in the number of electrolytic cells, and the drawback that equipment costs increase significantly when multiple electrolytic cells are connected. It was hot.

[Purpose of invention]

The present invention was made to eliminate the above-mentioned conventional drawbacks, and it eliminates the stagnation of the electrolyte in the electrolytic cell, and changes the flow path length and width of the electrolyte in the electrolytic cell by changing the properties of the electrodes used. The purpose is to provide an electrolytic cell that can be optimally set according to the flow rate of electrolytic solution, increases the effective utilization of electrolytic cell constituent materials, and reduces manufacturing man-hours by reducing the number of electrolytic cells used. It is.

[Structure of the idea]

The liquid permeable electrolytic cell of the present invention that achieves the above object includes a partition plate 2, a frame 3, an electrode frame 4, a frame 3', an ion exchange membrane 5, a frame 3'', an electrode frame 4', a frame 3, and a partition plate 2. In a liquid permeable electrolytic cell in which the electrode frames 4 and 4' are stacked in this order and porous electrodes that allow liquid flow are held in the frame spaces of the electrode frames 4 and 4', the ion exchange membrane 5
The present invention is characterized in that guide frames 10 and 10' are provided in the frame spaces of adjacent frames 3' and 3'' to partition the electrolyte along its flow path.

Hereinafter, the present invention will be explained based on an embodiment shown in an exploded view in FIG. 1 and an exploded longitudinal cross-sectional view in FIG.

The electrolytic cell 1 of the present invention has a partition plate 2, a frame 3, an electrode frame 4, a frame 3',
It is constructed by stacking the ion exchange membrane 5, frame 3'', electrode frame 4', frame 3, and partition plate 2' in this order, and the materials of these members are the same as those of the conventional one.

However, in the present invention, guide frames 10 and 10' are arranged in the frame spaces of frames 3' and 3'' adjacent to the ion exchange membrane 5, respectively, for partitioning the electrolyte along the flow direction. , 4' divides the flow of the electrolyte in the electrodes 6, 6' arranged in the frame space.

In order to improve the electrical contact between the partition plates 2, 2' and the electrodes 6, 6', as shown in FIGS. Although it is preferable to provide a guide frame in the frames 3 and 3, it is also possible to provide a guide frame in the frames 3 and 3.

The shape of the guide frames 10, 10' is usually columnar as shown in FIG. 3, and the number of guide frames can be determined as appropriate depending on the size of the electrode area, and each member constituting the electrolytic cell is overlapped. It is physically fixed by this.

In addition, in FIG. 3, a frame 3' is superimposed on the electrode frame 4 on which the electrode 6 is arranged, and a guide frame 1 is placed in the frame space of this frame 3'.
It shows a state in which 0 is placed.

The guide frame 10 is arranged along the flow E of the electrolytic solution so as to divide this flow, and the protrusion 11
It is preferable to provide resistance to the flow of the electrolytic solution and to make the flow of the electrolytic solution more uniform.

Further, a connecting portion is provided to connect the protrusions 11 of adjacent guide frames to each other, so that the entire guide frame has a # shape,
A recessed portion for flowing the electrolyte may also be formed in this connecting portion.

Furthermore, in correspondence with the protrusion 11, a protrusion 12 that provides resistance to the flow of the electrolytic solution may also be provided on the frame 3'.

The electrolytic cell of the present invention is formed by overlapping each of the above-mentioned members and pressing them together from the outside.

As a result, in the present invention, the electrode 6 is divided into a plurality of sections by the guide frame 10, forming multiple flow paths for the electrolytic solution, resulting in a structure as if a large number of small electrolytic cells were arranged on a plane.

Now, if we explain the anolyte using Figure 3,
The anolyte is supplied from the anolyte inlet side flow hole 7, flows along the flow path F, and then flows along the arrow E while penetrating the electrodes divided by the guide frame 10, and flows from one electrode section to the next. The anolyte is collected in the flow path G after being supplied to the electrode section of
is discharged from.

The catholyte similarly flows through the segmented electrodes, although the direction of flow is reversed.

Electricity is supplied, for example, with the partition plate 2 side being positive and the 2' side being negative, and electrolysis is performed while the anolyte and catholyte are flowing in contact with the electrodes divided as described above.

[Effect of idea]

As described above, according to the present invention, multiple flow paths for electrolyte are formed on the electrode by the guide frame, and the electrolyte is guided along these flow paths, so that the electrolyte is stagnation, and the electrolytic efficiency can be significantly improved.

For example, as a power generation part of a redox type secondary battery, ten electrolytic cells of the present invention are connected in series, in which the flow of electrolyte in the negative and anode chambers of each electrolytic cell is partitioned by a guide frame along the flow of electrolyte. When connected to a conventional electrolytic cell without such a guide frame, the charging/discharging energy efficiency could be improved by about 6% compared to a conventional electrolytic cell without such a guide frame. Furthermore, since stagnation of the electrolytic solution is prevented, it is easy to scale up the electrolytic cell, and it is possible to manufacture a large electrolytic cell, which was previously impossible.

Furthermore, it is easy to design a large electrolytic cell from the data of a small test electrolytic cell.

Furthermore, since the electrolysis capacity per electrolytic cell is improved, the number of electrolytic cells can be reduced when a plurality of electrolytic cells are arranged and used, and equipment costs can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a liquid permeable electrolytic cell according to the present invention, Fig. 2 is an exploded vertical cross-sectional view thereof, Fig. 3 is a perspective view showing the arrangement of the guide frame, and Fig. 4 is a conventional liquid permeable electrolytic cell. FIG. 5 is an exploded perspective view of a type electrolytic cell, FIG. 5 is an exploded longitudinal cross-sectional view thereof, and FIG. 6 is an explanatory diagram showing the flow of electrolyte in a conventional electrode. 1... Liquid permeable electrolytic cell, 2, 2'... Partition plate,
3, 3', 3'', 3... frame, 4, 4'... electrode frame,
5...Ion exchange membrane, 10,10'...Guide frame.

Claims (1)

[Scope of utility model registration request] The partition plate 2, the frame 3, the electrode frame 4, the frame 3', the ion exchange membrane 5, the frame 3'', the electrode frame 4', the frame 3, and the partition plate 2' are stacked in this order, and the frames of the electrode frames 4 and 4' are stacked. In a liquid-permeable electrolytic cell in which a porous electrode that allows liquid flow is held in each space, a guide for partitioning an electrolytic solution into the frame spaces of frames 3' and 3'' adjacent to the ion exchange membrane 5 along the flow path thereof. A liquid permeable electrolytic cell characterized in that frames 10 and 10' are provided.