Novel proton exchange membrane fuel cell

A proton exchange membrane, fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems affecting GDL porosity, gas permeability, mass diffusivity, thermal conductivity and electrical conductivity, bipolar plate processing difficulty, Porous structure damage and other problems, to achieve the effect of improving mass transfer efficiency and assembly performance, improving convection function and residence time, stress state and deformation balance

Active Publication Date: 2019-05-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the bipolar plate in the battery has the characteristics of difficult processing, high occupation cost, and high proportion of volume and mass.
[0006] 2) The bipolar plate causes serious deformation of the carbon paper diffusion layer, which affects the flow channel design and mass and heat transfer
[0007] Since the Young's modulus of the bipolar plate is 13000MPa, which is much larger than that of GDL's 6MPa, and the thickness of the diffusion layer is thin, the deformation caused by the assembly pressure mainly occurs on the GDL, and its porous structure will also be destroyed. , which will have a great impact on the generation of water and the change of GDL porosity, which in turn will affect the properties of GDL such as porosity, gas permeability, mass diffusivity, thermal conductivity and electrical conductivity, bringing new water management Problem: The contact

Method used

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  • Novel proton exchange membrane fuel cell
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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0048] Example 1

[0049] The cell structure of PEMFC "diffusion layer with flow channel (de-bipolarization)". battery structure such as figure 2 shown.

[0050] The main feature of the battery structure is that the bipolar plate of the traditional battery is removed, and the flow channel is designed in the central part of the diffusion layer (GDL). ) or anode (anode) unit; the cathode unit and the anode unit are separated by a proton exchange membrane (membrane), and the periphery can be properly packaged. The stack power density of the battery is ≥2.5kW / L, and the service life of the battery is significantly longer than that of the traditional battery.

Example Embodiment

[0051] Example 2

[0052] PEMFC cell structure with "diffusion layer with troposphere (de-bipolarization)". battery structure such as image 3 shown.

[0053] The main feature of the battery structure is that the bipolar plate of the traditional battery is removed, the convection layer is designed in the central part of the diffusion layer (GDL), and the two sides of the diffusion layer are the same electrode catalyst layer (catalyst layer), which together constitute the cathode (cathode). Or anode (anode) unit; the cathode unit and the anode unit are separated by a proton exchange membrane (membrane), and the periphery can be properly packaged. The stack power density of the battery is ≥2.5kW / L, and the service life of the battery is significantly longer than that of the traditional battery.

Example Embodiment

[0054] Example 3

[0055] The cell structure of PEMFC "planar bipolar plate + convection layer + diffusion layer". battery structure such as Figure 4 (the upper picture shows the integrated structure of the troposphere / diffusion layer, and the lower picture shows the close contact between the troposphere and the diffusion layer).

[0056] The main feature of the battery structure is: a flat bipolar plate is used, that is, the side of the bipolar plate close to the diffusion layer is processed into a plane, a convection layer is added between the bipolar plate and the diffusion layer, and the convection layer is made of carbon fiber, porous titanium , titanium mesh, stainless steel mesh, etc., the catalytic layer is located on both sides of the proton exchange membrane, forming the anode and the cathode respectively, and the periphery can be properly packaged. The stack power density of the battery is ≥2.5kW / L, and the service life of the battery is significantly longer than...

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Abstract

The invention discloses a novel proton exchange membrane fuel cell. According to the proton exchange membrane fuel cell, a passage through which water, electricity and gas enter or exit from the cellis realized by designing a flow channel or a special convection zone in a diffusion layer, the phenomenon of 'bipolar plate removal' or 'bipolar plate flow channel removal' can be realized, the contact transmission resistance between the bipolar plates and the diffusion layer in the cell can be obviously reduced, and thus the PEMFC with high efficiency, low cost and long service life can be obtained.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell (PEMFC), in particular to a PEMFC with a new electrode structure, in particular to improving the existing PEMFC electrode structure, designing a diffusion layer with flow channels or a special The troposphere structure can remove the electrode plate or flatten the electrode plate, significantly reduce the contact transmission resistance between the bipolar plate and the diffusion layer in the battery, thereby obtaining a high-efficiency PEMFC, and belongs to the technical field of fuel cells. Background technique [0002] Hydrogen energy is considered to be an ideal secondary energy source to solve the problem of abandoning wind and electricity, reduce dependence on oil, and realize coordinated solutions to energy and environmental problems. Proton exchange membrane fuel cells (PEMFC) are considered to be the ultimate solution for new energy vehicles. It has attracted great attention and fie...

Claims

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Application Information

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IPC IPC(8): H01M8/0228H01M8/0258
CPCY02E60/50
Inventor 谢志勇梁伊丽
Owner CENT SOUTH UNIV
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