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Anode catalyst slurry, anode catalyst layer, membrane electrode and fuel cell

An anode catalyst layer and catalyst slurry technology, applied in fuel cells, battery electrodes, circuits, etc., can solve problems such as membrane electrode damage, and achieve the effects of avoiding damage, avoiding oxidative corrosion reaction, and low preparation cost

Inactive Publication Date: 2020-11-06
浙江锋源氢能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides an anode catalyst slurry, an anode catalyst layer, a membrane electrode and a fuel cell, the main purpose of which is to solve the problem of membrane electrode damage caused by voltage reversal due to insufficient anode fuel supply

Method used

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  • Anode catalyst slurry, anode catalyst layer, membrane electrode and fuel cell

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preparation example Construction

[0045] Here, the preparation method of the above-mentioned anode catalyst slurry includes the following steps: after adding an ionic polymer to the solvent to disperse evenly, adding a carbon-supported noble metal catalyst and an electrolytic water catalyst, and performing ultrasonic (ultrasonic), ball milling, and mechanical shearing (homogeneous) After any one of the dispersing treatments in the mass machine), a homogeneously dispersed catalyst slurry is obtained. The slurry is sprayed or coated on the proton exchange membrane, and dried to obtain the membrane electrode catalyst layer.

[0046] On the other hand, an embodiment of the present invention also provides an anode catalyst layer, wherein the anode catalyst layer contains a carbon-supported noble metal catalyst, an ion polymer, and an electrolytic water catalyst; wherein, the carbon-supported noble metal catalyst includes a carbon support and is supported on The noble metal on the carbon support; the mass of the ele...

Embodiment 1

[0054] Anode catalyst slurry preparation: the Pt / C catalyst with a mass percentage of Pt of 70%, RuO 2 Nano powder, perfluorosulfonic acid ionic polymer solution (5wt% Nafion, Chemours company), and solvent isopropanol were mixed and dispersed by ultrasonic wave to form anode catalyst slurry. Wherein, in the anode catalyst slurry: RuO 2 The nano powder is 80% of the mass of Pt in the Pt / C catalyst, the I / C ratio is 1:1 (the mass ratio of ionomer to carbon support is the I / C ratio), and the solid content is 2wt%.

[0055] Preparation of cathode catalyst slurry: mix Pt / C catalyst with a mass percentage of Pt of 70%, perfluorosulfonic acid ionomer solution (5wt% Nafion, Chemours company), solvent isopropanol, and disperse into cathode catalyst by ultrasonic slurry. Wherein, in the cathode catalyst slurry: the I / C ratio is 1:1, and the solid content is 2wt%.

[0056] Membrane electrode preparation: according to the loading of Pt in the anode catalyst layer is 0.1mg / cm 2 , The ...

Embodiment 2

[0059] The difference between Example 2 and Example 1 is that the preparation steps of the anode catalyst slurry are different, and the rest of the steps are the same. The preparation steps of the anode catalyst slurry in embodiment 2 are as follows:

[0060] Anode catalyst slurry preparation: the Pt / C catalyst with a mass percentage of Pt of 70%, IrO 2 Nano powder, perfluorosulfonic acid ionic polymer solution (5wt% Nafion, Chemours company), and solvent isopropanol were mixed and dispersed by ball milling to form anode catalyst slurry. Wherein, in the anode catalyst slurry: IrO 2 The nano powder is 20% of the mass of Pt in the Pt / C catalyst, the I / C ratio is 1:1, and the solid content is 2wt%.

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Abstract

The invention relates to an anode catalyst slurry, an anode catalyst layer, a membrane electrode and a fuel cell and relates to the technical field of fuel cells. According to the main technical scheme, the anode catalyst slurry is used for preparing an anode catalyst layer of a fuel cell and comprises a catalyst slurry body and a water electrolysis catalyst. The catalyst slurry body contains a carbon-supported noble metal catalyst; the carbon-supported noble metal catalyst comprises a carbon carrier and noble metal loaded on the carbon carrier. The water electrolysis catalyst is used for catalyzing water electrolysis reaction; the mass of the electrolyzed water catalyst is 20-100% of the mass of the noble metal. And the anode catalyst layer is obtained by coating the anode catalyst slurryon a proton exchange membrane and drying. The membrane electrode comprises the anode catalyst layer. The anode catalyst slurry is mainly used for improving the anti-reversion performance of the membrane electrode in the fuel cell, and the problem of membrane electrode damage caused by voltage reversion due to insufficient anode fuel supply is solved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an anode catalyst slurry, an anode catalyst layer, a membrane electrode and a fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a clean energy that directly converts chemical energy into electrical energy. It has the advantages of high conversion efficiency, high power density, low temperature operation and no pollution, and has broad application prospects in the fields of power vehicles, small and medium-sized power stations and mobile electronic devices. Membrane electrode (MEA) is the core component of proton exchange membrane fuel cell. The membrane electrode is composed of an anode gas diffusion layer, an anode catalyst layer, a proton exchange membrane, a cathode catalyst layer, and a cathode gas diffusion layer. The performance of membrane electrodes directly determines the performance of fuel cells. Therefore, the preparation of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M8/0656H01M8/1004
CPCH01M4/8828H01M4/9041H01M4/9083H01M8/0656H01M8/1004Y02E60/50
Inventor 关春红祝传贺战立俊王海峰王利生潘蕾袁蕴超顾恺伟
Owner 浙江锋源氢能科技有限公司
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