Diaphragm for alkaline water electrolysis, alkaline water electrolysis apparatus, method for producing hydrogen, and method for producing diaphragm for alkaline water electrolysis

A manufacturing method and technology of water electrolysis, applied in the direction of diaphragm, electrolysis process, electrolysis components, etc., can solve the problem of increasing the voltage loss of the diaphragm, and achieve the effect of maintaining low voltage loss, good gas barrier properties, and inhibiting ion permeability.

Active Publication Date: 2017-10-13
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since ions cannot pass through the pores blocked by air bubbles, there is a problem that the voltage loss of the separator increases during electrolysis

Method used

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  • Diaphragm for alkaline water electrolysis, alkaline water electrolysis apparatus, method for producing hydrogen, and method for producing diaphragm for alkaline water electrolysis
  • Diaphragm for alkaline water electrolysis, alkaline water electrolysis apparatus, method for producing hydrogen, and method for producing diaphragm for alkaline water electrolysis
  • Diaphragm for alkaline water electrolysis, alkaline water electrolysis apparatus, method for producing hydrogen, and method for producing diaphragm for alkaline water electrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0290] Put 135 g of zirconia ("EP zirconia", manufactured by Daiichi Xen Element Chemical Industry Co., Ltd.) and 210 g of N-methyl-2-pyrrolidone (manufactured by Wako Pure Chemical Industries, Ltd.) into 1 kg of SUS balls with a particle size of 0.5 mm In a ball mill kettle with a capacity of 1000mL. This was stirred at a rotation speed of 70 rpm for 3 hours in an atmosphere of 25° C., and dispersed to obtain a mixture. The resulting mixture was filtered through a stainless steel basket (30 meshes), and balls were separated from the mixture. 45 g of polysulfone ("Udel" (trademark), manufactured by Solvay Advanced Polymers Co., Ltd.) and 18 g of polyvinylpyrrolidone (weight average molecular weight (Mw) 900,000, manufactured by Wako Pure Chemical Industries, Ltd.) were added to the mixture from which the spheres were separated, and stirred The Three-One Motor was stirred at 60° C. for 12 hours to dissolve, and a coating liquid having the following composition was obtained.

...

Embodiment 2

[0298] Put 135 g of zirconia ("EP zirconia", manufactured by Daiichi Xen Element Chemical Industry Co., Ltd.) and 210 g of N-methyl-2-pyrrolidone (manufactured by Wako Pure Chemical Industries, Ltd.) into 1 kg of SUS balls with a particle size of 0.5 mm In a ball mill kettle with a capacity of 1000mL. This was stirred at a rotation speed of 70 rpm for 3 hours in an atmosphere of 25° C., and dispersed to obtain a mixture. The resulting mixture was filtered through a stainless steel basket (30 meshes), and balls were separated from the mixture. 45 g of polysulfone ("Udel" (trademark), manufactured by Solvay Advanced Polymers Co., Ltd.) and 18 g of polyvinylpyrrolidone (weight average molecular weight (Mw) 900,000, manufactured by Wako Pure Chemical Industries, Ltd.) were added to the mixture from which the spheres were separated, and stirred The Three-One Motor was stirred at 60° C. for 12 hours to dissolve, and a coating liquid having the following composition was obtained.

...

Embodiment 3

[0306] Put 135 g of zirconia ("EP zirconia", manufactured by Daiichi Xen Element Chemical Industry Co., Ltd.) and 210 g of N-methyl-2-pyrrolidone (manufactured by Wako Pure Chemical Industries, Ltd.) into 1 kg of SUS balls with a particle size of 0.5 mm In a ball mill kettle with a capacity of 1000mL. This was stirred at a rotation speed of 70 rpm for 3 hours in an atmosphere of 25° C., and dispersed to obtain a mixture. The resulting mixture was filtered through a stainless steel basket (30 meshes), and balls were separated from the mixture. 45 g of polysulfone ("Udel" (trademark), manufactured by Solvay Advanced Polymers Co., Ltd.) and 18 g of polyvinylpyrrolidone (weight average molecular weight (Mw) 900,000, manufactured by Wako Pure Chemical Industries, Ltd.) were added to the mixture from which the spheres were separated, and stirred The Three-One Motor was stirred at 60° C. for 12 hours to dissolve, and a coating liquid having the following composition was obtained.

...

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Abstract

A diaphragm for alkaline water electrolysis according to the present invention is provided with a polymeric porous membrane including a polymeric resin and hydrophilic inorganic particles. The porosity of the polymeric porous membrane is at least 30%, but not more than 60%. The average pore size of both surfaces of the polymeric porous membrane is at least 0.5 mu m, but not more than 2.0 mu m. The ratio (mode particle size/average pore size) of the mode particle size of the hydrophilic inorganic particles to the average pore size of the polymeric porous membrane is at least 2.0.

Description

technical field [0001] The present invention relates to a separator for alkaline water electrolysis, an alkaline water electrolysis device, a method for producing hydrogen, and a method for producing a separator for alkaline water electrolysis. Background technique [0002] Hydrogen is widely used industrially in petroleum refining, chemical synthesis materials, metal refining, stationary fuel cells, and the like. In recent years, the availability in hydrogen refueling stations for fuel cell vehicles (FCV), smart communities, hydrogen power stations, etc. is also expanding. In addition, as the introduction of renewable energy progresses, it is necessary to maintain the balance of supply and demand in the power grid, so the demand for hydrogen storage equipment that can store large-capacity electricity for a long time is also increasing. From these points of view, high-purity hydrogen production technology is attracting attention. [0003] One of the industrial production m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B13/02C25B13/08C25B9/19
CPCB29C48/0011B29C48/0018B29C48/911C25B13/08Y02E60/36C25B1/04C25B9/73C25B11/057C25B9/19B05D3/108B29B7/90B29C71/0009B29C2071/0036B29K2105/16B29K2995/0092B29L2031/755
Inventor 铃木悠介中川兼次高见英史藤本则和
Owner ASAHI KASEI KK
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