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CCM for fuel cell and preparation method thereof

A fuel cell and slurry technology, applied in the direction of fuel cells, battery electrodes, circuits, etc., can solve the problems of degradation and loss of precious metal catalysts, reduce the effective catalytic area, and reduce the performance of electrodes, so as to achieve good resistance to degradation and loss, durability, drainage, etc. Good effect, the effect of reducing impedance

Pending Publication Date: 2022-05-20
ZHEJIANG TIANNENG HYDROGEN ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on fuel cell vehicles is getting deeper and deeper, but there are still technical bottlenecks in its commercialization. When the fuel cell is working, a large amount of water is easy to enter the electrode hole, covering the surface of the catalytic layer and it is difficult to drain away, resulting in local water flooding, which prevents the reaction gas from interacting with the catalyst. The effective contact reduces the electrode performance
Noble metal catalysts in the catalytic layer will be degraded and lost after long-term operation, reducing the effective catalytic area and resulting in performance degradation

Method used

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  • CCM for fuel cell and preparation method thereof
  • CCM for fuel cell and preparation method thereof
  • CCM for fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of hydrophilic layer slurry:

[0039]1) Take by weighing 20% ​​platinum content, TEC10EA20E of the precious metal catalyst TANAKA brand (Tanaka Precious Metals Group) with high durability of graphitization and 5% by mass percentage of DuPont's d520 ionic polymer solution are stirred and mixed. In terms of mass ratio, the TEC10EA20E in TEC10EA20E Carbon: ionic polymer = 1:1, stirring time 30min;

[0040] 2) Then add the hydrophilic solvent Solvay D83 solution (the brand is solvay, the model is D83-24B) with a mass percentage of 8%. In terms of mass ratio, carbon in TEC10EA20E: hydrophilic agent = 1: 2, and stir for 20 minutes;

[0041] 3) Then the whole body is ultrasonically homogenized for 40 minutes for later use;

[0042] (2) Preparation of the first hydrophobic layer slurry:

[0043] 1) take by weighing 50% platinum content, the TEC10E50E of the noble metal catalyst TANAKA brand of high specific surface area is the d520 ionomer solution stirring an...

Embodiment 2

[0055] (1) Preparation of hydrophilic layer slurry:

[0056] 1) Take by weighing 20% ​​platinum content, the TEC10EA20E of TANAKA brand of the precious metal catalyst TANAKA of graphitization high durability is mixed with the d520 ionomer solution of Dupont, in terms of mass ratio, carbon in TEC10EA20E: ionomer=1: 0.7, stir Time 20min;

[0057] 2) Then add Solvay D83 solution with a mass percentage of hydrophilic solvent of 8%, in terms of mass ratio, carbon in TEC10EA20E:hydrophilic agent=1:2, and stir for 20min;

[0058] 3) Then the whole body is ultrasonically homogenized for 40 minutes for later use;

[0059] (2) Preparation of the first hydrophobic layer slurry:

[0060] 1) take by weighing 50% platinum content, the TEC10E50E of the noble metal catalyst TANAKA brand of high specific surface area is the d520 ionomer solution stirring and mixing of 5% Dupont by mass percent, by mass ratio, the carbon in TEC10E50E: ionomer= 1:0.6, stirring time 30min;

[0061] 2) Then ad...

Embodiment 3

[0072] (1) Preparation of hydrophilic layer slurry:

[0073] 1) Take by weighing 20% ​​platinum content, the TEC10EA20E of TANAKA brand of the precious metal catalyst TANAKA of graphitization high durability and the d520 ionic polymer solution of Du Pont are stirred and mixed, by mass ratio, the carbon in TEC10EA20E: ionic polymer=1: 10, stir Time 40min;

[0074] 2) Then add Solvay D83 solution with a mass percentage of hydrophilic solvent of 8%, in terms of mass ratio, carbon in TEC10EA20E:hydrophilic agent=1:10, and stir for 20min;

[0075] 3) Then the whole body is ultrasonically homogenized for 40 minutes for later use;

[0076] (2) Preparation of the first hydrophobic layer slurry:

[0077] 1) take by weighing 50% platinum content, the TEC10E50E of the precious metal catalyst TANAKA brand of high specific surface area is the d520 ionomer solution stirring and mixing of 5% Dupont by mass percent, by mass ratio, carbon in TEC10E50E: ionomer= 1:10, stirring time 40min;

...

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PUM

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Abstract

The invention discloses a CCM for a fuel cell and a preparation method of the CCM, and relates to the field of fuel cells. A CCM for a fuel cell comprises a proton exchange membrane and catalyst layers located on the two sides of the proton exchange membrane, and each catalyst layer is divided into a hydrophilic layer, a first hydrophobic layer and a second hydrophobic layer from one side of the proton exchange membrane to the outside. The CCM for the fuel cell is good in drainage effect, degradation loss resistance and durability, and the preparation method of the CCM is easy to operate and suitable for batch production and laboratory operation.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a CCM for fuel cells and a preparation method thereof. Background technique [0002] Fuel Cell (Fuel Cell) is an electrochemical power generation device, which is different from a battery in the conventional sense. A fuel cell directly converts chemical energy into electrical energy in an electrochemical manner. It does not go through a heat engine process, so it is not limited by the Carnot cycle, has high energy conversion efficiency (40%-60%), is environmentally friendly, and hardly emits nitrogen and sulfur oxides. Due to its excellent performance, fuel cells have become a research hotspot in various countries in the world, and have played a huge role in power generation, mobile power supply, and vehicle power supply. The research on fuel cell vehicles is getting deeper and deeper, but there are still technical bottlenecks in its commercialization. When the fuel cell is working, a ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M8/1004
CPCH01M4/90H01M4/8825H01M8/1004Y02E60/50
Inventor 沈新龙曹寅亮李伯球方蕾范峰强杨光华孙基文
Owner ZHEJIANG TIANNENG HYDROGEN ENERGY TECH CO LTD
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