Electrolytic device and electrode

Patent metadata

Field	Value
Publication number	US-2016186337-A1
Application number	US-201615062619-A
Country	US
Kind code	A1
Filing date	Mar 7, 2016
Priority date	Sep 19, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

According to one embodiment, an electrolytic device includes an electrolytic cell including a first electrode, a second electrode opposing the first electrode and a diaphragm provided between the first electrode and the second electrode. The first electrode is formed of a plate including a first surface opposing the diaphragm, a second surface located on an opposite side to the diaphragm, and first recess portions formed in the first surface with a first pattern. The first recess portions include a bottom surface apart from the first surface and through-holes opening to the second surface of the first electrode and to a part of the bottom surface.

First claim

What is claimed is:

1 . An electrolytic device comprising:
an electrolytic cell comprising a first electrode, a second electrode opposing the first electrode and at least one diaphragm provided between the first electrode and the second electrode, wherein the first electrode is formed of a plate comprising a first surface opposing the diaphragm, a second surface located on an opposite side to the diaphragm, and first recess portions formed in the first surface with a first pattern, the first recess portions include a bottom surface apart from the first surface and through-holes each opening to the second surface of the first electrode and to a part of the bottom surface.

2 . The electrolytic device of claim 1 , wherein an area of the first recess portions opened in the first surface of the first electrode is 60% or larger than an area of the first surface.

3 . The electrolytic device of claim 1 , wherein an open aperture ratio of the through-holes is 30% or less of the area of the first surface of the first electrode.

4 . The electrolytic device of claim 1 , wherein an open area ratio of the through-holes with respect to an area of the entire first surface is a half or less, of an opening area ratio of the first recess portions with respect to the area of the entire first surface.

5 . The electrolytic device of claim 1 , wherein a depth of the first recess portions is less than a half of a thickness of the first electrode.

6 . The electrolytic device of claim 5 , wherein the depth of the first recess portions is within 0.5 mm.

7 . The electrolytic device of claim 1 , wherein each of the first recess portion includes a plurality of through-holes each opening to the second surface and to a part of the bottom surface of the first recess portion.

8 . The electrolytic device of claim 1 , wherein the first electrode comprises second recess portion formed in the second surface with a second pattern different from the first pattern, and a plurality of parts of each second recess portion communicate with a respective one of the first recess portions to form the plurality of through-holes.

9 . The electrolytic device of claim 8 , wherein the first recess portions extend in a first direction, respectively, and the second recess portions open to the second surface and include an opening dimension in the first direction, greater than a width of the first recess portions, and
a length of the first recess portions in the first direction is longer than a width of the second recess portions in the first direction, and a plurality of the first recess portions communicate with a respective one of the second recess portions to form the through-holes.

10 . The electrolytic device of claim 9 , wherein the first recess portions are arranged in a width direction thereof at a first pitch, and the second recess portions are arranged in a width direction thereof at a second pitch greater than the first pitch.

11 . The electrolytic device of claim 10 , wherein the first pitch of the first recess portions is 0.8 mm or less.

12 . The electrolytic device of claim 10 , wherein the second pitch of the second recess portions is 1 mm or greater.

13 . The electrolytic device of claim 10 , wherein a value obtained by subtracting the opening width W 1 of the first recess portions from an arrangement pitch P 1 of the first recess portions is 0.3 mm or less.

14 . The electrolytic device of claim 9 , wherein a depth of the second recess portions is greater than a half of the thickness of the first electrode.

15 . The electrolytic device of claim 9 , wherein the second recess portions extend in a second direction different from the first direction.

16 . The electrolytic device of claim 15 , wherein a plurality of the second recess portions communicate with a respective one of the first recess portions to form respective ones of the through-holes.

17 . The electrolytic device of claim 14 , wherein the first recess portions extend continuously in the first direction from one end to an other end of an effective region of the first electrode and the second recess portions extend continuously in the second direction from one end to the other end of the effective region of the first electrode.

18 . The electrolytic devices of claim 17 , wherein the first recess portions and the second recess portions extend linearly.

19 . The electrolytic device of claim 17 , wherein each of the first recess portions is divided into plurality with gaps formed in the first direction.

20 . The electrolytic device of claim 18 , wherein the second recess portions are each divided into plurality with gaps formed in the second direction.

21 . The electrolytic device of claim 9 , wherein the second recess portions are constituted by through-holes penetrating the first electrode.

22 . The electrolytic device of claim 1 , wherein the first recess portions include a plurality of third recess portions which make each adjacent pair of the first recess portions to communicate with each other.

23 . The electrolytic device of claim 1 , wherein the first electrode comprises a catalytic layer formed on the first recess portions except for the first surface.

24 . An electrode for use in an electrolytic device, formed in a plate-shape, the electrode comprising:
a first surface opposing a diaphragm; a second surface located on an opposite side to the first surface; and first recess portions formed in the first surface with a first pattern; wherein the first recess portions include a bottom surface apart from the first surface and through-holes each opening to the second surface and to a part of the bottom surface.

25 . The electrode of claim 24 , wherein an area of the first recess portions opened in the first surface is 60% or larger than an area of the first surface.

26 . The electrode of claim 24 , wherein an open aperture ratio of the through-holes is 30% or less of an area of the first surface.

27 . The electrode of claim 24 , wherein an open area ratio of the through-holes with respect to an area of the entire first surface is a half or less, of an opening area ratio of the first recess portions with respect to the area of the entire first surface.

28 . The electrode of claim 24 , wherein a depth of the first recess portions is less than a half of a thickness of the electrode.

29 . The electrode of claim 28 , wherein the depth of the first recess portions is within 0.5 mm.

30 . The electrode of claim 24 , further comprising second recess portions formed in the second surface with a second pattern different from the first pattern, a plurality of locations of the second recess portions communicate with the first recess portions to form the through-holes.

31 . The electrode of claim 24 , wherein the first recess portions open to the first surface and extend in a first direction, and the second recess portions open to the second surface and having an opening length greater than a width of the first recess portions in a second direction crossing the first direction, and
a length of the first recess portion in the first direction is greater than a width of the second recess portions in the first direction and a plurality of the first recess portions are communicated with a respective of one of the second recess portion

Assignees

• Toshiba Kk

Inventors

• Yokota Masahiro
• Oota Hideo
• Naito Katsuyuki
• Yoshinaga Norihiro
• Mei Wu
• Tomimatsu Norihiro
• Yagi Ryosuke

Classifications

• C25B11/03 Primary

  perforated or foraminous · CPC title

• C25B9/08

  Chemistry & Metallurgy · mapped topic

• C02F1/4674

  with halogen or compound of halogens, e.g. chlorine, bromine · CPC title

• C02F2201/46115

  Electrolytic cell with membranes or diaphragms · CPC title

• C02F1/4672

  by electrooxydation · CPC title