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Wide-width humidity self-adaptive fuel cell gas diffusion layer

A gas diffusion layer, fuel cell technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of low efficiency, difficult to implement on a large scale, and difficult to control the cost of alcohol solvents.

Active Publication Date: 2019-11-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of multiple coatings has low efficiency and is difficult to implement on a large scale, and the cost of using a large amount of alcohol solvents is difficult to control

Method used

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  • Wide-width humidity self-adaptive fuel cell gas diffusion layer
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  • Wide-width humidity self-adaptive fuel cell gas diffusion layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A wide-width humidity-adaptive fuel cell gas diffusion layer, the specific formula and preparation parameters of the flattened layer and the corrugated layer are shown in Table 1.

[0063] Table 1 Formula and preparation parameters of leveling layer and corrugated layer in Example 1

[0064]

[0065] Obtain a wide-width humidity adaptive fuel cell gas diffusion layer, wherein the carbonaceous porous substrate has a self-weight of 35g / cm 2 , with a thickness of 200 μm and a peak pore size of 40 μm; a leveling layer with a thickness of 50 μm and a peak pore size of 100 nm; a corrugated layer with a thickness of 10 μm and a peak pore size of 70 nm. The peak-to-trough wave height is 3 μm, and the peak width is 150 μm. Carry out scanning electron microscopy under the scale of 1mm and 200μm, specifically as image 3 , 4 As shown, the results of the porosity test are shown in Figure 5-7 shown.

[0066] The prepared wide-width humidity-adaptive fuel cell gas diffusion ...

Embodiment 2

[0068] A wide-width humidity-adaptive fuel cell gas diffusion layer, the specific formula and preparation parameters of the flattened layer and the corrugated layer are shown in Table 2.

[0069] Table 2 The formulation and preparation parameters of the leveling layer and the corrugated layer in Example 2

[0070]

[0071] Among them, the carbonaceous porous substrate has a self-weight of 25g / cm 2 , with a thickness of 100 μm and a peak pore size of 30 μm; a leveling layer with a thickness of 10 μm and a peak pore size of 150 nm; a corrugated layer with a thickness of 10 μm and a peak pore size of 40 nm. The distance between the peak and the trough is 3 μm, and the peak width is 100 μm. The prepared wide-width humidity-adaptive fuel cell gas diffusion layer was assembled and tested with membrane electrodes, and the test conditions were the same as in Example 1. The polarization curve results under low humidification conditions are as follows Figure 8 As shown, both cath...

Embodiment 3

[0073] A wide-width humidity-adaptive fuel cell gas diffusion layer, the specific formula and preparation parameters of the flattened layer and the corrugated layer are shown in Table 3. Table 3 The formulation and preparation parameters of the leveling layer and the corrugated layer in Example 3

[0074]

[0075]

[0076] Among them, the carbonaceous porous substrate has a self-weight of 150g / cm 2 , with a thickness of 300 μm and a peak pore size of 50 μm; a leveling layer with a thickness of 100 μm and a peak pore size of 200 nm; a corrugated layer with a thickness of 20 μm and a peak pore size of 90 nm. The distance between the peak and the trough is 5 μm, and the peak width is 200 μm. The prepared wide-width humidity-adaptive fuel cell gas diffusion layer was assembled and tested with membrane electrodes, and the test conditions were the same as in Example 1. The polarization curve results under low humidification conditions are as follows Figure 8 As shown, both...

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Abstract

The invention relates to a wide-width humidity self-adaptive fuel cell gas diffusion layer which comprises a carbonaceous porous base material (1), a leveling layer (2) and a corrugated layer (3) which are sequentially stacked; the leveling layer (2) is made of carbon powder dispersion liquid in a self-made mode, and the corrugated layer (3) is made of carbon powder gel in a self-made mode. Compared with the prior art, self-adaption of a fuel cell under the wide-width humidity working condition can be achieved, and the preparation method is simple and environmentally friendly.

Description

technical field [0001] The invention relates to a gas diffusion layer for a fuel cell, in particular to a fuel cell gas diffusion layer with a wide width and humidity self-adaptation. Background technique [0002] Proton exchange membrane fuel cell (PEMFC), mainly consists of bipolar plate (Bipolar Plate), cathode / anode gas diffusion layer (Gas Diffusion Layer, GDL), cathode / anode catalyst layer (Catalyst Layer, CL), proton exchange membrane (Membrane ) and other key components. During the operation of PEMFC, the performance of the battery is affected by many factors, mainly including the catalytic activity of the electrocatalyst, the conductivity of the electrode, the conductivity of the proton exchange membrane, the internal water management and thermal management of the battery, etc. Among them, the defects of water management cause the battery The drop in performance is particularly noticeable. [0003] The ideal battery operating state is that the water transfer in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8657H01M4/8807Y02E60/50
Inventor 林瑞陈亮王晓岗刁晓雨唐圣濠钟迪
Owner TONGJI UNIV
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