JP2000199093A - Electrode for water electrolysis - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode with the surface area drastically increased as compared with that of the plate electrode or mesh electrode having the same external shape and the electrolytic efficiency enhanced. SOLUTION: This electrode is formed by knitting plural yarn-like electrode members 10, 11a and 11b while leaving an opening 13 between the members. In the electrode, the yarn-like electrode member has plural ruggednesses on the surface and a thin-sheet electrode member has plural ruggednesses on the front and/or the rear face. Small-diameter through-holes are are bored in the thin-sheet electrode member with high density. Plural slits are furnished in the electrode member, and the part between the slits is corrugated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode for water electrolysis, and more particularly to an electrode used in an electrolyzed water generator for generating acidic water, alkaline ionized water, etc. The present invention relates to an electrode for water electrolysis having a relatively large electrode surface area.

[0002]

2. Description of the Related Art Conventionally, a lath-processed or knitted titanium net is used as an electrode used in an electrolyzed water generator and having an electrode surface area larger than that of a plate electrode of the same shape. A titanium net electrode material for water electrolysis in which platinum is plated with platinum has been proposed (JP-A-8-1687).
No. 71). In this titanium net electrode material, in the case of a lath-processed titanium net having a hole of 10 mesh or less, the surface area is about 1.3 times or more as compared with the plate, the electrolytic efficiency is increased, and strong acidity, strong alkalinity, It is said that high-potential water can be easily obtained.

[0003]

The above-mentioned Japanese Patent Application Laid-Open No. Hei 8-168.
No. 771 discloses a titanium net electrode material, a so-called mesh electrode material, having a surface area of about 1.10 compared to a plate.
Although it could be three times or more and could exert a certain effect on the improvement of the electrolysis efficiency, there was a certain limit in the enlargement of the surface area due to the net-like and mesh-like electrodes.

An object of the present invention is to provide an electrode for water electrolysis in which the surface area is at least 1.5 times larger than that of a plate and the electrolysis efficiency can be remarkably improved.

[0005]

SUMMARY OF THE INVENTION The present invention provides a knitted electrode, a thin plate electrode provided with a plurality of concave and convex portions on the front and / or back surface, and a thin plate having small-diameter through holes formed at high density. In addition to providing a plurality of cuts in the shape of the electrode and the thin plate-like electrode member,
The problem was solved by employing an electrode in which a portion sandwiched between the cuts was formed in a wavy shape.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The electrode for water electrolysis proposed by the present invention is characterized in that a plurality of filamentary electrode members are formed in a knit shape with a gap between each filamentary electrode member. Electrodes. Here, as a configuration in which a plurality of thread-like electrode members are formed in a knit shape with a gap between each thread-like electrode member, a vertical thread-like electrode member and a horizontal thread-like electrode member are separated by a gap. In addition to being crossed for each book and configured as a plain weave, which is one of the basic structures of woven fabric, as in twill weave, which is another one of the basic structures of woven fabric, a vertical thread-shaped electrode member or a horizontal thread-shaped electrode It is also possible to form a knit shape by forming a structure in which the floating of the member follows the diagonal and creates oblique lines.

Although the surface area of the electrode can be increased only by forming it in a knit shape, a gap is provided between the thread electrode members so that the contact area between the thread electrode members is reduced, and the knit shape is formed. It is desirable to form.

Further, providing a plurality of uneven portions on the surface of the thread-like electrode member is more effective in increasing the surface area of the electrode.

Another electrode for water electrolysis proposed by the present invention is an electrode for water electrolysis in which a plurality of irregularities are provided on the front and / or back surface of a thin plate-shaped electrode member. The electrode for water electrolysis is an electrode for water electrolysis in which small-diameter through-holes are densely formed in a thin plate-shaped electrode member.

In addition, a plurality of cuts may be provided in the thin plate-shaped electrode member, and a portion sandwiched between the cuts may be formed in a wave shape to form an electrode for water electrolysis.

The thread-like electrode member described above has a diameter of 0.3
mm to 3.0 mm, and when a thin plate-shaped electrode member is used, its thickness is 1.0 mm
It is desirable to set it to 1.5 mm. If the diameter is larger than the above or the thickness is larger than the above, it is not preferable from the viewpoint of electric resistance and the like.

[0012] Both the thread-shaped electrode member and the thin plate-shaped electrode member are composed of a titanium thread, a titanium thin plate,
Alternatively, a structure in which platinum is plated on titanium, platinum is deposited on titanium, and platinum is baked on titanium, or a structure consisting only of ceramics having low electric resistance and good conductivity, and platinum is plated on ceramics having low electric resistance and good conductivity Either a configuration in which platinum is welded to ceramics having low electrical resistance and good conductivity, or a configuration in which platinum is sintered on ceramics having low electrical resistance and good conductivity can be adopted.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

[0014]

Embodiment 1 A first embodiment of the present invention will be described with reference to FIGS.

[0015] Platinum is plated on titanium and has a diameter of 0.5 mm.
The prepared thread-shaped electrode members 10, 11a and 11b are prepared.
Next, like the plain weave of a woven fabric, the vertical thread-shaped electrode members 10 and the horizontal thread-shaped electrode members 11a and 11b are crossed one by one to form a knit shape, and frames 9a and 9b made of titanium and stainless steel are formed. The electrode 8 is welded to the periphery.

The string-like electrode members 10 in the longitudinal direction which are adjacent horizontally
10 and the vertically adjacent horizontal thread-like electrode members 11a, 1
1b, there is provided a gap denoted by reference numeral 13 in FIGS. 1 (a) and 1 (b), and a vertical thread-shaped electrode member 10 and a horizontal A gap indicated by reference numeral 12 in FIG. 2 is provided between the thread-shaped electrode members 11a and 11b.

As a result, as shown in this embodiment, the vertical
cm, 10 cm wide electrode, the conventional 20 cm long
The surface area of the electrode can be increased three times or more as compared with a plate-like electrode having a width of 10 cm and a width of 10 cm.

Further, as shown in FIG.
If the concave and convex portions such as the concave portion 14 and the convex portion 16 are provided on the surface of No. 0, and the concave and convex portions such as the concave portion 15 and the convex portion 17 are provided on the surface of the thread-like electrode members 11a and 11b, the surface area of the electrode can be further increased. .

[0019] The length of 20 cm, width of 10 cm manufactured in this embodiment.
When the electrolysis efficiency was compared with that of a conventional plate-shaped electrode having a length of 20 cm and a width of 10 cm using the electrode 8 of cm, it was confirmed that extremely excellent electrolysis efficiency was exhibited.

[0020]

Embodiment 2 FIG. 4 shows another embodiment of the present invention.

Platinum is deposited on ceramics having a small electric resistance and good conductivity, and a 1.5 mm-thick thin plate-shaped electrode material 5 is formed.
Was prepared.

A projection 7 and a depression 6 are provided on the front and back surfaces of the thin plate-shaped electrode material 5 to obtain an electrode 4 of the present invention. Here, the depth of the concave portion 6 (the height of the convex portion 7) is 1.0 mm to 3.0 mm from the plane when the electrode material 5 is a thin plate, and the maximum diameter of the concave portion 6 and the convex portion 7. Is 1.5 mm to 2.
5 mm. Also, 100 mm of the thin plate-shaped electrode material 5
1500 per ^2-200 amino recess 6 (protrusions 7) is provided.

If the electrode 4 has a length of 20 cm and a width of 10 cm, the surface area can be increased 1.5 to 2.0 times as compared with the conventional plate-like electrode material having a length of 20 cm and a width of 10 cm. Can be.

In this embodiment, the length is 20 cm and the width is 10 cm.
When the electrolysis efficiency was compared with that of a conventional plate-shaped electrode having a length of 20 cm and a width of 10 cm using the electrode 4 of cm, it was confirmed that a very excellent electrolysis efficiency was exhibited.

[0025]

Embodiment 3 FIG. 5 shows another embodiment of the present invention.

A titanium material having a thickness of 1.0 mm, a length of 20 cm,
An electrode material 2 in the form of a thin plate having a width of 10 cm was prepared.

Cuts are provided at intervals of 2 to 3 mm in the vertical direction over a length of 8 cm in the horizontal direction of the thin electrode material 2 made of titanium, and the portions 3 sandwiched between the cuts are formed in a wavy shape. The electrode 1 of the present invention was formed.

Side wall 3 of portion 3 sandwiched between cuts
a, a thin plate-shaped electrode material 2 in a cut portion
The electrode 1 has a total surface area of 2.5 to 3.0 times as large as that of a conventional plate-shaped electrode material having a length of 20 cm and a width of 10 cm. Can be.

The product manufactured in this embodiment is 20 cm long and 10 cm wide.
When the electrolysis efficiency was compared with a conventional plate-like electrode having a length of 20 cm and a width of 10 cm using the electrode 1 of 1 cm, it was confirmed that a very excellent electrolysis efficiency was exhibited.

[0030]

Embodiment 4 FIG. 6 shows still another embodiment of the present invention.

Platinum was plated on ceramics having a small electric resistance and good conductivity to prepare a thin plate-like electrode material 18 having a thickness of 1.0 mm, a length of 20 cm and a width of 10 cm.

The thin plate-shaped electrode material 18 was punched out, and through holes 19 having a diameter of 1 mm were provided at high density. That is, an interval of about 1 mm was provided between adjacent through holes 19, and 2500 to 3000 through holes 19 were provided per 100 mm ² . Thus, the electrode 20 of the present invention was formed.

1 m height formed by the through hole 19
m, the peripheral area of a cylindrical body having a diameter of 1 mm is added.
The surface area can be increased 1.5 to 2.0 times as compared with a 0 cm plate electrode material.

In this embodiment, the length is 20 cm and the width is 10 cm.
When the electrolysis efficiency was compared with a conventional plate-like electrode having a length of 20 cm and a width of 10 cm using the electrode 20 of 20 cm, it was confirmed that extremely excellent electrolysis efficiency was exhibited.

[0035]

According to the present invention, the surface area of an electrode can be significantly increased as compared with the surface area of a plate-like electrode or a mesh-like electrode having the same outer shape, so that the electrolysis efficiency can be extremely increased. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention,
(A) is a plan view, (b) is AA, B- of (a).
The enlarged plan view of B, CC, DD part.

FIG. 2 is a partially enlarged cross-sectional view of FIG.

FIG. 3 is a partially enlarged perspective view of another embodiment of the electrode shown in FIG. 1;

FIG. 4 is a view showing another embodiment of the present invention,
(A) is a perspective view, (b) is FF sectional drawing of (a).

FIG. 5 is a view showing another embodiment of the present invention,
(A) is a perspective view, (b) is EE sectional drawing of (a).

FIG. 6 is a view showing another embodiment of the present invention,
(A) is a perspective view, (b) is GG sectional drawing of (a).

[Description of Signs] 1, 4, 8, 20 Electrode 10, 11a, 11b Threaded electrode member 2, 5, 18 Thin plate electrode member 6 Concave portion 7 Convex portion 12, 13 Gap 14, 15 Concave portion 16, 17 Convex portion

Claims (5)

[Claims] 1. An electrode for water electrolysis, wherein a plurality of filamentary electrode members are formed in a knit shape with a gap between each filamentary electrode member. 2. The electrode for water electrolysis according to claim 1, wherein the thread-shaped electrode member has a plurality of uneven portions on the surface thereof. 3. An electrode for water electrolysis in which a plurality of irregularities are provided on the front and / or back of a thin plate-shaped electrode member. 4. An electrode for water electrolysis in which small-diameter through holes are densely formed in a thin plate-shaped electrode member. 5. An electrode for water electrolysis in which a plurality of cuts are provided in a thin plate-shaped electrode member, and a portion sandwiched between the cuts is formed in a wavy shape.