Diaphragm for alkaline water electrolysis, method for producing same, and method for producing inorganic-organic composite membrane

A manufacturing method and composite membrane technology, which can be used in diaphragms, electrolysis components, electrolysis processes, etc., can solve the problems of generating surplus power, unable to achieve balance between power supply and demand, and achieve low cost, excellent ion permeability, and dissolution of inorganic components. inhibiting effect

Pending Publication Date: 2020-03-31
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of power generated by wind power generation, solar power generation, etc. among renewable energy sources fluctuates due to weather conditions, so the balance between power supply and demand cannot be achieved, and surplus power will be generated

Method used

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  • Diaphragm for alkaline water electrolysis, method for producing same, and method for producing inorganic-organic composite membrane
  • Diaphragm for alkaline water electrolysis, method for producing same, and method for producing inorganic-organic composite membrane
  • Diaphragm for alkaline water electrolysis, method for producing same, and method for producing inorganic-organic composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0258] (1. Preparation of magnesium hydroxide dispersion)

[0259] Magnesium hydroxide (manufactured by Kyowa Chemical Industry Co., Ltd., product number 200-06H, average particle size 0.54 μm, aspect ratio 3.52, and the crystallite diameter in the direction perpendicular to the (110) plane is 70.7 nm) and N-methyl- 2-Pyrrolidone (manufactured by Wako Pure Chemical Industries, Ltd.) was mixed at a mass ratio of 1:1, and dispersed at room temperature for 6 hours using a pot mill equipped with zirconia media balls to prepare a magnesium hydroxide dispersion .

[0260] (2. Preparation of polysulfone resin solution)

[0261] Prepared by thermally dissolving polysulfone resin (manufactured by BASF Corporation, product number Ultrason S3010) in N-methyl-2-pyrrolidone (manufactured by Wako Pure Chemical Industries, Ltd.) at a concentration of 30% by mass at 80 to 100°C. Get out polysulfone resin solution.

[0262] (3. Preparation of coating solution)

[0263] The above-obtained m...

Embodiment 2

[0267] In Example 1, (4. Formation of coating film) was performed as follows, and the separator for alkaline water electrolysis was obtained by the method similar to Example 1 except this.

[0268] (4'. Formation of coating film)

[0269] Use an applicator to apply the coating solution so that the weighing value of the dried coating solution is 12.0 mg / cm 2 The method is coated on the PET film, on which the polypropylene (PP) non-woven fabric (manufactured by Japan Vilene Company, product number OA16728F, thickness 160 μ m, basis weight 60 g / m 2) in contact with it, thereby completely impregnating the coating solution into the nonwoven fabric. Thereafter, the nonwoven fabric impregnated with the coating solution was placed in a water bath at room temperature for 10 minutes to solidify the coating solution to form a film, and the film was peeled from the PET film together with the nonwoven fabric in water. After the water bath, the obtained membrane was dried at 80° C. for 30...

Embodiment 3

[0271] A separator for alkaline water electrolysis was obtained in the same manner as in Example 1 except that polyethersulfone (PESU) (manufactured by BASF Corporation, Ultrason E3010) was used instead of the polysulfone resin.

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Abstract

The present invention addresses the problem of providing a diaphragm for alkaline water electrolysis, which does not undergo the elution of inorganic components in an alkaline solution, at low cost. The present invention is a diaphragm for alkaline water electrolysis, characterized by containing magnesium hydroxide and an organic polymeric resin.

Description

technical field [0001] The invention relates to a diaphragm for alkaline water electrolysis and a manufacturing method thereof. More specifically, it relates to a low-cost separator for alkaline water electrolysis in which elution of inorganic components is suppressed, and a method for producing the same. In addition, the present invention relates to a method for producing an inorganic-organic composite membrane. Background technique [0002] Conventionally, in order to realize a low-carbon society, the introduction of renewable energy utilizing natural energy such as solar energy, wind power, and geothermal energy has been promoted. The amount of power generated by wind power generation, solar power generation, etc. among renewable energy sources fluctuates due to weather conditions, so the balance between power supply and demand cannot be achieved, and surplus power is generated. In recent years, a technology called power-to-gas (Power to Gas) for storing and utilizing s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B13/08B32B5/18C08J9/28C08K3/22C08L81/06C25B1/10
CPCB32B5/18C08J9/28C08K3/22C08L81/06C25B13/08Y02E60/36C25B1/04C25B13/07C25B13/02Y02P20/133C08J3/2053C08J9/008C08J2201/0544C08J2381/06C08K2003/222C08K2201/005C08K2201/011C08K2201/016
Inventor 中山信也古性和树
Owner NIPPON SHOKUBAI CO LTD
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