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Anti-reverse-pole catalyst layer of fuel cell and preparation method and application of anti-reverse-pole catalyst layer

A counter-electrode catalytic layer and fuel cell technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve problems such as membrane electrode performance attenuation, achieve reduced performance attenuation, good application prospects, and promote mass transfer capabilities Effect

Pending Publication Date: 2022-08-05
深圳市氢瑞燃料电池科技有限公司
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  • Description
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Problems solved by technology

[0004] Based on this, the present invention provides a fuel cell anti-anti-electrode catalytic layer and its preparation method and application, aiming to solve the problems of membrane electrode performance attenuation due to the anti-electrode phenomenon

Method used

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  • Anti-reverse-pole catalyst layer of fuel cell and preparation method and application of anti-reverse-pole catalyst layer
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  • Anti-reverse-pole catalyst layer of fuel cell and preparation method and application of anti-reverse-pole catalyst layer

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preparation example Construction

[0043] On the other hand, the present invention also provides a method for preparing the anti-reverse electrode catalytic layer of the fuel cell, comprising the following steps:

[0044] S1. Add 2,4,6-trimethyl-1,3,5-triazine, 2,2'bipyridine-5,5'-dicarbaldehyde, solvent and catalyst into a glass bottle in turn, and put them into the glass bottle. After being filled with nitrogen, it was sealed, reacted at 100-150 °C for 3-5 days, and quenched with water to obtain a reaction solution; the reaction solution was post-treated and dried at 60-100 °C for 2-4 hours to obtain an anode catalyst carrier (NF -vCOF);

[0045] S2, adding the anode catalyst carrier of step S1 to K 2 PtCl 4 In the solution, stir at 30-80°C for 0.5h, and then sonicate for 0.5h to obtain a mixture, wash the mixture, and dry at 60-100°C for 1-4h to obtain a Pt / NF-vCOF catalyst;

[0046] S3, disperse the Pt / NF-vCOF catalyst, mixed solution and Nafion D2020 of step S2 to obtain a dispersion treatment solution;...

Embodiment 1

[0072] A method for preparing an anti-reverse electrode catalytic layer of a fuel cell, comprising the following steps:

[0073] S1. Synthesis of anode catalyst carrier NF-vCOF: 2,4,6-trimethyl-1,3,5-triazine (24.63mg), 2,2'bipyridine-5,5'-dicarbaldehyde ( 63.66mg), 0.1mL of 50% sodium hydroxide aqueous solution, 0.5mL of methanol and 0.5mL of mesitylene were sequentially added to a high-temperature glass bottle, degassed and filled with nitrogen for 3 times, sealed the glass bottle, and reacted at 150 ° C for 5 days. The reaction was quenched, washed with water, DMF, ethanol, and tetrahydrofuran successively until the washing liquid was in a clear state. After drying at 60 °C for 4 h, NF-vCOF was obtained.

[0074] S2. Preparation of Pt / NF-vCOF catalyst: add 50 mg of NF-vCOF from step S1 to 250 mL of 1 mM K 2 PtCl 4 The aqueous solution was stirred at 30°C for 0.5h, sonicated for 0.5h, washed with water and tetrahydrofuran until the cleaning solution was clear, and dried at...

Embodiment 2

[0078] A method for preparing an anti-reverse electrode catalytic layer of a fuel cell, comprising the following steps:

[0079] S1. Synthesis of anode catalyst carrier NF-vCOF: 2,4,6-trimethyl-1,3,5-triazine (24.63mg), 2,2'bipyridine-5,5'-dicarbaldehyde ( 63.66 mg), 0.1 mL of 30% sodium hydroxide aqueous solution, 0.5 mL of methanol and 0.5 mL of mesitylene were sequentially added to a high-temperature glass bottle, degassed and filled with nitrogen 3 times, sealed the glass bottle, and reacted at 130 ° C for 5 days. The reaction was quenched, washed with water, DMF, ethanol, and tetrahydrofuran successively until the washing liquid was in a clear state, and dried at 70 °C for 3 h to obtain NF-vCOF.

[0080] S2. Preparation of Pt / NF-vCOF catalyst: add 50 mg of NF-vCOF from step S1 to 250 mL of 1 mM K 2 PtCl 4 The aqueous solution was stirred at 40 °C for 0.5 h, and after sonication for 0.5 h, washed with water and tetrahydrofuran until the cleaning solution was clear, and d...

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Abstract

The invention relates to a fuel cell anti-reverse-pole catalyst layer and a preparation method and application thereof.The fuel cell anti-reverse-pole catalyst layer contains a structural fragment shown in the formula I. The preparation method of the fuel cell anti-reverse-pole catalyst layer comprises the steps that S1, an anode catalyst carrier is prepared; s2, preparation of a Pt / NF-vCOF catalyst; s3, preparing catalyst slurry; and S4, preparing the anti-reverse catalyst layer of the fuel cell. In the invention, the prepared covalent organic framework material is a crystal organic porous material, has the characteristics of good long-range orderliness, adjustable pore channels, easiness in functionalization and the like, and has good thermal stability, acid corrosion resistance and alkali corrosion resistance. The catalyst layer provided by the invention can effectively improve the utilization rate of the catalyst and promote the mass transfer capability of the catalyst layer, and can be applied to fuel cells. In addition, the preparation method disclosed by the invention is controllable in process and high in repeatability, and the cost of the high-performance membrane electrode can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an anti-reverse electrode catalytic layer of a fuel cell and a preparation method and application thereof. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC) is an electrochemical energy conversion device that converts chemical energy stored in hydrogen and oxygen into electrical energy. With the advantages of low temperature, fast start and high specific power, it has broad application prospects in many fields such as automobiles, and is a research hotspot in the field of hydrogen energy application. [0003] Membrane electrode (MEA, Membrane Electrode Assembly), as the core component of proton exchange membrane fuel cell, is mainly composed of five parts: proton exchange membrane, anode and cathode catalytic layers, anode and cathode diffusion layers. Among them, the cathode and anode catalytic layers as the core components of the membrane electrode al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88H01M8/1004C08G83/00
CPCH01M4/921H01M4/925H01M4/88H01M4/8828H01M8/1004C08G83/008H01M2008/1095Y02E60/50
Inventor 张亮张震贺凤祁鹤
Owner 深圳市氢瑞燃料电池科技有限公司
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