Porous base material, porous electrode, carbon fiber paper, method for manufacturing carbon fiber paper, and method for manufacturing porous base material

A technology of porous substrate and carbon fiber paper, which is applied in the fields of porous substrate, porous electrode, carbon fiber paper, carbon fiber paper, and porous substrate manufacturing. It can solve problems such as electrolyte membrane damage and electrolyte diffusion hindrance, and achieve mechanical High strength, high drainage, high gas permeability and excellent effect

Inactive Publication Date: 2019-03-15
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as mentioned above, if the pitch-based carbon fiber is used simply for the purpose of increasing the fiber diameter of the carbon fiber, the electrolyte membrane of the redox flow battery will be Damaged or impeded electrolyte diffusion

Method used

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  • Porous base material, porous electrode, carbon fiber paper, method for manufacturing carbon fiber paper, and method for manufacturing porous base material
  • Porous base material, porous electrode, carbon fiber paper, method for manufacturing carbon fiber paper, and method for manufacturing porous base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0330] Prepare PAN-based carbon fiber (A) (manufactured by Mitsubishi Chemical Corporation, average fiber diameter: 13 μm) cut to an average fiber length of 6 mm, polyvinyl alcohol (PVA) fiber (manufactured by Kuraray Co., Ltd., trade name: VPB105-1, average fiber length 3mm).

[0331] Put carbon fiber (A) and PVA fiber in the ratio of 4:1 into the slurry tank of the wet short-wire continuous papermaking device, further add water to disperse the fiber evenly, and send out the wet cake (ウェブ) after sufficient dispersion, and send it to the short Stencil, after drying with a drier, obtain a width of 1000mm and a weight per unit area of ​​40g / m 2 carbon fiber sheets in roll form.

[0332] Next, the obtained carbon fiber sheet was immersed in a methanol solution of a phenolic resin (manufactured by DIC Corporation, trade name: Phenolite J-325) to obtain a phenolic resin solid adhered to 125 parts by mass of the carbon fiber sheet (100 parts by mass of the carbon fiber (A)). Compo...

Embodiment 2

[0337] As the carbon fibers, 75 parts by mass of PAN-based carbon fibers (A) (manufactured by Mitsubishi Chemical Corporation, average fiber diameter: 13 μm) cut into an average fiber length of 6 mm and PAN-based carbon fibers (B) cut into an average fiber length of 6 mm (Mitsubishi Chemical Co., Ltd. Co., Ltd. product, brand name: TR50S, average fiber diameter: 7 μm) 25 mass parts, it carried out similarly to Example 1, and obtained the porous base material which has the physical property shown in Table 1.

Embodiment 3

[0339] As carbon fibers, 50 parts by mass of PAN-based carbon fibers (A) (manufactured by Mitsubishi Chemical Corporation, average fiber diameter: 13 μm) cut to an average fiber length of 6 mm and PAN-based carbon fibers (B) cut to an average fiber length of 6 mm (Mitsubishi Chemical Corporation) were used. Co., Ltd. product, brand name: TR50S, average fiber diameter: 7 μm) 50 mass parts, it carried out similarly to Example 1, and obtained the porous base material which has the physical property shown in Table 1.

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Abstract

A porous base material and porous electrode provided with both gas permeability suitable for a gas diffusion layer for a fuel cell vehicle and mechanical strength that can withstand continuous roll toroll processing, and a porous electrode with superior diffusion properties for electrolytes suitable for electrodes used in redox flow batteries, have been desired. Provided is a porous base materialwherein carbon fiber (A) with an average fiber diameter of 10 - 20 mum, average fiber length of 2 - 30 mm, modulus of elasticity in tension of 200 - 600 GPa and tensile strength of 3000 - 7000 MPa isbonded by a carbon binder (D).

Description

technical field [0001] The present invention relates to a porous substrate usable as an electrode substrate for solid polymer fuel cells and redox flow batteries, a method for manufacturing the same, a porous electrode using the porous substrate, and carbon fiber paper and a method for manufacturing the same. [0002] This application claims priority based on Japanese Patent Application No. 2016-143905 for which it applied in Japan on July 22, 2016, The content is used for this specification. Background technique [0003] Solid polymer fuel cells (hereinafter, also simply referred to as "fuel cells") are required to have high electrical conductivity, excellent current collection capability, and good mechanical strength so that they can withstand various operations. In addition, at the same time, good diffusion of the substances involved in the electrode reaction is required. Therefore, the electrode substrate generally uses a planar structure mainly composed of carbon fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96D21H13/50H01M4/88C01B32/05
CPCD21H13/50D21H15/12D21H17/67D21H17/48H01M4/8605H01M4/8807H01M8/0234H01M4/96H01M8/10H01M8/188H01M4/8875H01M2008/1095H01M2300/0082H01M4/88C01B32/05H01M8/1018D21H21/52Y02E60/50Y02P70/50
Inventor 龙野宏人隅冈和宏秀岛幸太
Owner MITSUBISHI CHEM CORP
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