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Bipolar alkaline water electrolysis unit and electrolytic cell

A water electrolysis, bipolar technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of unsatisfactory performance of oxygen evolution electrodes, rising oxygen evolution overvoltage, inappropriate specific surface area, etc.

Active Publication Date: 2015-02-18
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all have performance problems such as an increase in oxygen evolution overvoltage in a short period of time.
[0015] In Patent Document 8, plasma spray coating is disclosed as an electrode, but the specific surface area, pore diameter, composition, etc. are not suitable as an electrode for water electrolysis, and the performance as an electrode for oxygen evolution is not satisfactory in this state.

Method used

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  • Bipolar alkaline water electrolysis unit and electrolytic cell
  • Bipolar alkaline water electrolysis unit and electrolytic cell
  • Bipolar alkaline water electrolysis unit and electrolytic cell

Examples

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Effect test

Embodiment 1

[0227] The present invention will be described below based on examples, but the present invention is not limited to the examples.

[0228] (Example 1)

[0229] use 3 image 3 and Figure 4 The electrolysis unit 12 shown in the first embodiment is the same as figure 1 In this way, the pressing flange 5, the pressing flange gasket 6, and the anode terminal unit 8 are arranged at one end, and the cathode terminal unit 13 is arranged at the other end, and the tail end pressing flange 14 with the insulating plate 41 installed is installed as figure 2 The same electrolytic cell 100 .

[0230] The electrolysis unit 12 is a circle with an outer diameter of 700mm, and the area of ​​the anode 18 and the cathode 19 is 0.25m 2 . In addition, the depth of the anode chamber 103 (anode chamber depth) is 15 mm, the depth of the cathode chamber 105 (cathode chamber depth) is 15 mm, and the materials of the anode side flange 23 and the cathode side flange 24 are both nickel. The thicknes...

Embodiment 2

[0238] use 3 Figure 12 and Figure 13 The electrolysis unit 12 shown in the first embodiment is the same as figure 1 In this way, the pressing flange 5, the pressing flange gasket 6, and the anode terminal unit 8 are arranged at one end, and the cathode terminal unit 13 is arranged at the other end, and the tail end pressing flange 14 with the insulating plate 41 installed is installed as figure 2 The same electrolytic cell 100 .

[0239] The electrolysis unit 12 is a circle with an outer diameter of 700mm, and the area of ​​the anode 18 and the cathode 19 is 0.25m 2 . In addition, the depth of the anode chamber 103 (anode chamber depth) was 15 mm, and the depth of the cathode chamber 105 (cathode chamber depth) was 15 mm. Further, anode ribs 20 made of nickel with a height of 15 mm and a thickness of 1.5 mm and cathode ribs 21 made of nickel with a height of 13.5 mm and a thickness of 1.5 mm were attached to the partition wall 22 made of nickel with a thickness of 1 mm ...

Embodiment 3

[0248] Instead of the electrolytic cell 12, use 3 Figure 8 ~ Figure 10 The electrolysis unit 120 shown in the second embodiment is the same as figure 1 In this way, the pressing flange 5, the pressing flange gasket 6, and the anode terminal unit 8 are arranged at one end, and the cathode terminal unit 13 is arranged at the other end, and the tail end pressing flange 14 with the insulating plate 41 installed is installed as figure 2 The same electrolytic cell 100 .

[0249] The electrolysis unit 12 is a circle with an outer diameter of 700mm, and the area of ​​the anode 18 and the cathode 19 is 0.25m 2 . In addition, the depth of the anode chamber 103 (anode chamber depth) is 15 mm, the depth of the cathode chamber 105 (cathode chamber depth) is 15 mm, and the materials of the anode side flange 23 and the cathode side flange 24 are both nickel. The thickness of the nickel partition wall 22 to which the nickel anode rib 20 of 15 mm in height and 1.5 mm in thickness and the ...

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Abstract

A bipolar alkaline water electrolysis unit (12) which is built in an electrolytic cell (100) for the purpose of obtaining oxygen and hydrogen by electrolyzing an electrolysis solution that is composed of alkaline water. This bipolar alkaline water electrolysis unit (12) is provided with: a positive electrode (18) for the generation of oxygen; a negative electrode (19) for the generation of hydrogen; a conductive partition wall (22) for separating the positive electrode and the negative electrode from each other; and an annular outer frame (16) which surrounds the conductive partition wall (22). A passage part for a gas and the electrolysis solution is provided above the conductive partition wall (22) and / or the outer frame (16), while a passage part for the electrolysis solution is provided below the conductive partition wall (22) and / or the outer frame (16).

Description

technical field [0001] The present invention relates to a bipolar alkaline water electrolysis unit and an electrolytic cell, the bipolar alkaline water electrolysis unit is assembled in an electrolytic cell for electrolyzing an electrolytic solution composed of alkaline water to obtain oxygen and hydrogen . More specifically, it relates to an inexpensive and energy-efficient bipolar alkaline water electrolysis unit and electrolytic cell for obtaining oxygen from an anode side and hydrogen from a cathode side using an electrolytic solution containing NaOH, KOH, or the like. Background technique [0002] Water electrolysis methods include the "solid polymer type water electrolysis method" in which anode and cathode catalysts are coated on a solid polymer electrolyte, and the "high temperature steam electrolysis method" in which a solid electrolyte that conducts oxygen ions is used to conduct electrolysis with high-temperature, high-pressure steam , "Alkaline water electrolysi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B9/08C25B1/02C25B9/02C25B11/03C25B11/06C25B9/19
CPCC25B9/20Y02E60/366Y02E60/36C25B1/04C25B9/73C25B11/031C25B11/075
Inventor 野秋康秀内野阳介三吉启二
Owner ASAHI KASEI KK
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