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Redox catalyst for metal-air fuel cells and preparation method of redox catalyst

A fuel cell and metal-air technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high noble metal catalysts and obstacles to the large-scale commercialization of fuel cells, and achieve low prices and reduce transmission resistance.

Active Publication Date: 2017-05-31
XINXIANG MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a metal-air fuel cell oxygen reduction catalyst and preparation method thereof, to solve the problem that the current fuel cell cathode catalyst proposed in the above-mentioned background technology is still an expensive platinum-based catalyst, and the high price of this noble metal catalyst becomes Important bottlenecks hindering the development of large-scale commercialization of fuel cells

Method used

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  • Redox catalyst for metal-air fuel cells and preparation method of redox catalyst

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Effect test

Embodiment 1

[0027] A metal-air fuel cell oxygen reduction catalyst, the formula of the metal-air fuel cell oxygen reduction catalyst is as follows:

[0028] Pt / c platinum carbon: 20g;

[0029] Melamine: 40g;

[0030] Ferric chloride: 40g;

[0031] Potassium hydroxide: 20g;

[0032] Methanol: 15g;

[0033] Nafion solution: 20g;

[0034] Aluminum oxide polishing powder: 10g.

[0035] Preferably, the weight percentage of the Pt / c platinum carbon is 20 wt%, and the weight percentage of the Nafion solution is 15 wt%.

[0036] Preferably, the particle size of the alumina polishing powder is 0.3 μm.

[0037] The present invention also provides a method for preparing an oxygen reduction catalyst for a metal-air fuel cell. The specific steps of the method for preparing an oxygen reduction catalyst for a metal-air fuel cell are as follows:

[0038] S1: Mix 20g of Pt / c platinum carbon and 40g of ferric chloride in an aqueous solution, and obtain a platinum carbon mixture after the solution is...

Embodiment 2

[0044] A metal-air fuel cell oxygen reduction catalyst, the formula of the metal-air fuel cell oxygen reduction catalyst is as follows:

[0045] Pt / c platinum carbon: 50g;

[0046] Melamine: 50g;

[0047] Ferric chloride: 60g;

[0048] Potassium hydroxide: 40g;

[0049] Methanol: 30g;

[0050] Nafion solution: 30g;

[0051] Aluminum oxide polishing powder: 20g.

[0052] Preferably, the weight percentage of the Pt / c platinum carbon is 30 wt%, and the weight percentage of the Nafion solution is 30 wt%.

[0053] Preferably, the particle size of the alumina polishing powder is 0.5 μm.

[0054] The present invention also provides a method for preparing an oxygen reduction catalyst for a metal-air fuel cell. The specific steps of the method for preparing an oxygen reduction catalyst for a metal-air fuel cell are as follows:

[0055] S1: Mix 50 g of Pt / c platinum carbon and 60 g of ferric chloride in an aqueous solution, and obtain a platinum carbon mixture after the solution ...

Embodiment 3

[0061] A metal-air fuel cell oxygen reduction catalyst, the formula of the metal-air fuel cell oxygen reduction catalyst is as follows:

[0062] Pt / c platinum carbon: 40g;

[0063] Melamine: 45g;

[0064] Ferric chloride: 50g;

[0065] Potassium hydroxide: 30g;

[0066] Methanol: 20g;

[0067]Nafion solution: 25g;

[0068] Aluminum oxide polishing powder: 15g.

[0069] Preferably, the weight percentage of the Pt / c platinum carbon is 25 wt%, and the weight percentage of the Nafion solution is 20 wt%.

[0070] Preferably, the particle size of the alumina polishing powder is 0.4 μm.

[0071] The present invention also provides a method for preparing an oxygen reduction catalyst for a metal-air fuel cell. The specific steps of the method for preparing an oxygen reduction catalyst for a metal-air fuel cell are as follows:

[0072] S1: Mix 40g of Pt / c platinum carbon and 50g of ferric chloride in an aqueous solution, and obtain a platinum carbon mixture after the solution is ...

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Abstract

The invention discloses a redox catalyst for metal-air fuel cells and a preparation method of the redox catalyst and belongs to the technical field of air fuel cells. A formula of the redox catalyst for the metal-air fuel cells comprises the following ingredients: 20g to 50g of Pt / c platinum / carbon, 30g to 50g of melamine, 40g to 60g of ferric chloride, 20g to 40g of potassium hydroxide, 15g to 30g of methanol, 20g to 30g of Nafion solution and 10g to 20g of alumina polishing powder. The preparation method of the redox catalyst for the metal-air fuel cells comprises the following specific steps: (S1) obtaining a platinum-carbon mixture; (S2) obtaining a catalyst coagulum; (S3) carrying out uniform mixing thoroughly; (S5) preparing redox catalyst powder. According to the redox catalyst and the preparation method thereof, the perfluorosulfonate polymer Nafion solution is adopted as a coating and a support of the catalyst, so that a membrane electrode can be formed, and the transfer resistance of substances and the resistance of the electrode are lowered; the prepared redox catalyst is low in price and can meet the development requirements of large-scale commercial fuel cells.

Description

technical field [0001] The invention relates to the technical field of air fuel cells, in particular to a metal-air fuel cell oxygen reduction catalyst and a preparation method thereof. Background technique [0002] A fuel cell is an environmentally friendly and efficient energy conversion device. At present, the cathode catalyst of fuel cells is still an expensive platinum-based catalyst, and the high price of this noble metal catalyst has become an important bottleneck hindering the large-scale commercialization of fuel cells. In recent years, in the research of non-precious metal cathode catalyst materials for fuel cells, the application of a large number of carbon materials with different structures, such as carbon nanotubes, graphene, amorphous carbon and mesoporous carbon, has reduced the fuel consumption to a certain extent. The cost of the battery, but its cost performance is still very low. The performance of non-precious metal catalysts prepared on these carbon m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/92
CPCH01M4/90H01M4/9008H01M4/926Y02E60/50
Inventor 晁淑军刘丽霞杨振华
Owner XINXIANG MEDICAL UNIV
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