Title:
GAS DIFFUSION LAYER FOR PROTON EXCHANGE MEMBRANE FUEL CELL AND PREPARATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/252389
Kind Code:
A1
Abstract:
The present invention relates to a gas diffusion layer for a proton exchange membrane fuel cell and a preparation method therefor. The method comprises: subjecting a carbon fiber suspension which is mainly composed of a fibrous adhesive, water, a dispersant, and carbon fibers with different length-diameter ratios to papermaking and drying to obtain carbon fiber base paper, and then subjecting same to carbonization and graphitization treatments under the protection of nitrogen or an inert gas to obtain the gas diffusion layer for the proton exchange membrane fuel cell, wherein the fibrous adhesive is a composite fiber or blend fiber composed of a phenolic resin and other resins. The finally prepared gas diffusion layer for the proton exchange membrane fuel cell has a pore gradient, and the layer with the minimum pore diameter is an intrinsic microporous layer. The method of the present invention omits the step of impregnating the base paper with a resin, can realize the integrated forming of carbon paper and the microporous layer, does not require the subsequent coating preparation of the microporous layer, and has a simple process and reduced cost.
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Inventors:
WANG BIAO (CN)
QU TONGQING (CN)
HUANG XIYI (CN)
QU TONGQING (CN)
HUANG XIYI (CN)
Application Number:
PCT/CN2021/111081
Publication Date:
December 08, 2022
Filing Date:
August 06, 2021
Export Citation:
Assignee:
UNIV DONGHUA (CN)
International Classes:
H01M4/88
Foreign References:
| CN101611509A | 2009-12-23 | |||
| US20140011118A1 | 2014-01-09 | |||
| US20040058123A1 | 2004-03-25 | |||
| CN109478654A | 2019-03-15 | |||
| CN111576079A | 2020-08-25 | |||
| CN1884689A | 2006-12-27 | |||
| CN106887597A | 2017-06-23 |
Attorney, Agent or Firm:
SHANGHAI TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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