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A fuel cell gas diffusion layer structure

A gas diffusion layer and fuel cell technology, applied in fuel cells, fuel cell parts, electrical components, etc., can solve the problems of high price, technology monopoly, slow progress in industrial application of gas diffusion layer, etc., and achieve high mechanical strength , The effect of low contact resistance

Active Publication Date: 2019-07-23
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high price of the gas diffusion layer prepared by this method and the technology is mostly monopolized by foreign countries, the industrial application of the domestic fuel cell gas diffusion layer is slow.

Method used

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  • A fuel cell gas diffusion layer structure
  • A fuel cell gas diffusion layer structure
  • A fuel cell gas diffusion layer structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a fuel cell gas diffusion layer structure with a thickness of 3.0 to 5.0 mm, including a base layer 1 and a microporous layer 2 with a thickness of 0.05 to 0.15 mm, one side of the base layer 1 has a depth of 2.5 to 3.0 The gas channel 11 of mm, the other side is connected with the microporous layer 2, the material of the base layer 1 is a metal fiber felt, and the microporous layer 2 has a copper-graphene composite film; its preparation method comprises the following steps:

[0025] (1) Prepare metal fibers by cutting, fill the metal fibers into a rectangular mold of 40.00mm×30.00mm×4.35mm, and prepare them by low-temperature solid-phase sintering method after pressurization, such as image 3 The metal fiber felt shown above, the above metal fibers are as figure 2 As shown, the equivalent diameter is 0.01-0.03 mm, and the length is 10-15 mm; the low-temperature solid-phase sintering method is specifically: pressurized metal fiber at a tempe...

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Abstract

The invention discloses a gas diffusion layer structure of a fuel cell. The thickness of the gas diffusion layer structure is 3.0-5.0 millimeters. The gas diffusion layer structure comprises a substrate layer and a micropore layer, wherein a gas runner is arranged at one side of the substrate layer, the other side of the substrate layer is connected with the micropore layer, the material of the substrate layer is metal fiber felt, and a copper-graphene composite phase film is arranged on the micropore layer. Compared with the prior art, the gas diffusion layer structure of the fuel cell has the advantages of high mechanical strength, water permeability, gas permeability, low contact resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell gas diffusion layer structure. Background technique [0002] Proton exchange membrane fuel cell, as a high-efficiency and environment-friendly power generation device, has become a research and development hotspot in various countries in recent years. Its core component, the three-in-one membrane electrode (MEA), is usually prepared by a hot-pressing process from a gas diffusion layer, a catalytic layer and a proton exchange membrane. The gas diffusion layer is composed of a conductive porous material, which plays multiple roles such as supporting the catalytic layer, collecting current, conducting gas, and discharging water. One of the key components of performance. An ideal gas diffusion layer should meet three conditions: good drainage, good air permeability and good electrical conductivity. [0003] A gas diffusion layer usually consists of a bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0258H01M8/0228H01M8/0206H01M8/0226
CPCH01M8/0206H01M8/0226H01M8/0228H01M8/0258Y02E60/50
Inventor 周伟刘瑞亮邱清富李双利何平黄婷婷徐东升庞浜
Owner XIAMEN UNIV