Porous electrode substrate and manufacturing method thereof, film-electrode combination and solid high-polymer fuel cell

A technology of electrode base material and manufacturing method, which is applied in the direction of solid electrolyte fuel cells, battery electrodes, and final product manufacturing, which can solve problems such as water flooding and increased condensation, and achieve the effect of low apparent thermal diffusivity

Active Publication Date: 2011-06-22
MITSUBISHI CHEM CORP
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even with this porous electrode substrate, there is a problem that water flooding may occur if water condensation increases in a high current density region under high humidification conditions.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Porous electrode substrate and manufacturing method thereof, film-electrode combination and solid high-polymer fuel cell
  • Porous electrode substrate and manufacturing method thereof, film-electrode combination and solid high-polymer fuel cell
  • Porous electrode substrate and manufacturing method thereof, film-electrode combination and solid high-polymer fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] Short fiber bundles of polyacrylonitrile (PAN)-based carbon fibers having an average fiber diameter of 7 μm and an average fiber length of 3 mm were uniformly dispersed in water and opened in a slurry tank of a wet short-wire continuous papermaking apparatus. When the carbon short fibers are sufficiently dispersed, polyvinyl alcohol (PVA) short fibers (manufactured by Kuraray Co., Ltd., trade name: VBP105-1, cut length 3 mm) as a binder and fibrils as a binder are uniformly dispersed The polyethylene pulp (manufactured by Mitsui Chemicals Co., Ltd., trade name: SWP, water freeness: 450 ml) was sent out at 18 mass % and 77 mass % with respect to the short carbon fibers, respectively. The mesh that was sent out was passed through a short mesh plate, and dried with a desiccant to obtain a gram weight (flat weight) of 43g / m2 2, carbon fiber paper A with a length of 100m.

[0118] Next, the carbon fiber precursor resin was adhered to the carbon fiber paper A by a kiss coat ...

Embodiment 2

[0122] A porous electrode substrate was obtained in the same manner as in Example 1, except that the temperature for heating in a nitrogen atmosphere for 5 minutes was set to 1450° C. in the carbonization treatment performed in the continuous firing furnace. Table 1 shows the results of evaluating the obtained porous electrode substrate.

Embodiment 3

[0124] A porous electrode substrate was obtained in the same manner as in Example 1, except that the temperature for heating in a nitrogen atmosphere for 5 minutes was set to 1100° C. in the carbonization treatment performed in the continuous firing furnace. Table 1 shows the results of evaluating the obtained porous electrode substrate.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Basis weightaaaaaaaaaa
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The present invention provides a porous electrode substrate and a manufacturing method thereof, a film-electrode combination with the substrate and a solid high-polymer fuel cell. The invention provides the porous electrode substrate with the advantages of low thermal diffusion coefficient in a thickness direction and high flooding resistance at high moisture state or high current density area, and the film-electrode combination with the substrate, and the solid high-polymer fuel cell. The porous electrode substrate is prepared through the method which comprises the following steps: a step of obtaining a piece of carbon fiber paper which is adhered with the resin and is obtained through causing carbon precursor resin to adhere with the carbon fiber paper that comprises the planar scattered short carbon fibers with an average fiber diameter of 3-9 mu m and original fiber-shaped object; a step of performing hot pressing and solidifying the carbon fiber paper which is adhered with resin for obtaining an intermediate substrate; and heating the intermediate substrate with a maximum temperature of 1000-1800 DEG C and carbonizing the carbon precursor resin.

Description

technical field [0001] The present invention relates to a porous electrode substrate used in a solid polymer fuel cell, a method for producing the same, a membrane-electrode assembly, a solid polymer fuel cell, and the like using the substrate. Background technique [0002] As a porous electrode substrate for a solid polymer fuel cell, a substrate in which short carbon fibers are bonded by resin carbides is used. Porous electrode substrates are generally produced by forming a sheet-like intermediate substrate from a mixture of short carbon fibers and a forming medium containing an organic binder such as polyvinyl alcohol, and then heating the intermediate substrate. The resin which is carbonized at the time, for example, a resol type (resol type) phenol resin which is a thermosetting resin is attached, and the intermediate base material to which the resin is attached is further heated and carbonized. [0003] One of the important functions of the porous electrode substrate ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M8/10
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 龙野宏人隅冈和宏
Owner MITSUBISHI CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap