Conductive carbon fibre slice and solid polymer electrolytic fuel cell

A conductive carbon fiber, fuel cell technology, applied in solid electrolyte fuel cells, fuel cell parts, thin material processing, etc., can solve problems such as weakening gas diffusion characteristics

Inactive Publication Date: 2002-10-09
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies have a disadvantage that they weaken the gas diffusion characteristics, which is the advantage of carbon fiber woven cloth

Method used

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  • Conductive carbon fibre slice and solid polymer electrolytic fuel cell
  • Conductive carbon fibre slice and solid polymer electrolytic fuel cell
  • Conductive carbon fibre slice and solid polymer electrolytic fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A double-ply (2 / 40 Nm) of single yarns, woven at warp and weft densities of 50 and 46 threads per inch, respectively, yields an oxidized plain weave woven fabric, the single yarns being gathered Long oxidized fibers (LOI value, 38) of 45-50 with a filament diameter of 8 microns and crimped polyacrylonitrile groups were obtained. The woven fabric was carbonized by heating to 900°C in a nitrogen stream, and then graphitized by heating to 2000°C in an argon atmosphere. The graphitized carbon fiber woven cloth has a warp density of 70 threads per inch (corresponding to 276 threads per 10 cm) and a weft density of 54 threads per inch (corresponding to 213 threads per 10 cm).

[0075] The obtained carbon fiber woven cloth was immersed in a phenolic resin ethanol solution (resole type) having a concentration of 3% by weight. The woven fabric was dried at 100°C, and then hot-pressed at 220°C to obtain a conductive carbon fiber woven fabric. Therefore, the amount of phenolic r...

Embodiment 2

[0077] A conductive carbon fiber woven cloth was obtained in the same manner as in Example 1, except that a phenolic resin solution (resole type) having a concentration of 1.5% by weight was used. The properties of the woven fabric are shown in Table 1.

Embodiment 3

[0079] A conductive carbon fiber woven cloth was obtained in the same manner as in Example 1, except that a phenolic resin solution (resole type) having a concentration of 6% by weight was used. The properties of the woven fabric are shown in Table 1.

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Abstract

A conductive carbon fiber sheet having a thickness of 0.05 to 1 mm, a weight per unit area of ​​60 to 250 g/m2, a bending resistance (L) of 6 cm or more as determined by the 45° cantilever method, and a coplanar resistivity 0.2Ωcm or less, it is suitable for the gas diffusion layer of solid polymer electrolysis fuel cells.

Description

technical field [0001] The present invention relates to an electrically conductive carbon fiber sheet comprising carbon fibers. This carbon fiber sheet has excellent electrical conductivity and gas permeability and moderate stiffness, so it is suitable as a gas diffusion layer material for solid polymer electrolysis fuel cells, and is used in power sources of motor vehicles and power sources of cogeneration power systems middle. Background technique [0002] In recent years, the development of fuel cells has been remarkable. The fuel cells that have been developed can be divided into alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, solid oxide cells, solid polymer electrolysis fuel cells and other cells determined by the type of electrolyte. Among these types, solid polymer electrolysis fuel cells are noteworthy as power sources for electric vehicles and household power sources because they can be used at low temperatures...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D15/00H01M4/96H01M8/02
CPCD10B2101/12D10B2321/10D10B2401/062D10B2401/063D10B2401/16H01M4/96H01M8/0204Y10T428/27Y10T428/249953Y10T428/249924Y02E60/50D03D15/275D03D15/41D03D15/283
Inventor 平原聪铃木光雄
Owner MITSUBISHI CHEM CORP
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