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Nanocarbon material, preparation method thereof, and application of nanocarbon material to fuel cells

A nano-carbon material, nano-carbon technology, applied in nano-carbon, nano-technology, nano-technology and other directions, can solve the problems of high price, restrict the promotion process, scarcity of resources, etc., achieve good electrical conductivity, achieve uniform dispersion, and few structural defects. Effect

Active Publication Date: 2019-12-10
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the need to use a large amount of platinum in Pt-based catalysts, platinum is a precious metal, and resources are scarce and expensive, which seriously restricts the commercialization of fuel cells using platinum as an electrode catalyst.

Method used

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  • Nanocarbon material, preparation method thereof, and application of nanocarbon material to fuel cells
  • Nanocarbon material, preparation method thereof, and application of nanocarbon material to fuel cells
  • Nanocarbon material, preparation method thereof, and application of nanocarbon material to fuel cells

Examples

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Effect test

Embodiment approach

[0091] According to one embodiment of the present application, the preparation method of the non-noble metal oxygen reduction catalyst comprises the following steps:

[0092] 1) the heme (C 34 h 32 FeN 4 o 4 ) is dissolved in the alkali solution, and the composite nanocarbon (GH) of the graphene sheet and the carbon nanohorn is evenly dispersed in the above solution to form a uniform dispersion;

[0093] 2) Subjecting the above dispersion to a hydrothermal reaction, the hydrothermal reaction temperature is 160-200°C, and the hydrothermal reaction time is 12-48 hours;

[0094] 3) After the product of the above hydrothermal reaction is filtered, washed and dried, it is placed in a hydrogen atmosphere furnace or an inert atmosphere or a mixture of the two atmospheres for high-temperature annealing treatment, and finally a black solid is obtained, which is the non-precious metal oxygen reduction catalyst.

[0095] The non-noble metal oxygen reduction catalyst is a hierarchical...

Embodiment 1

[0100] 1. The composite nanocarbon (GH) of graphene sheets and carbon nanohorns prepared by direct current arc method: one end of two solid graphite rods with diameters of 8 mm and 6 mm are respectively installed on the positive and negative poles of the direct current arc discharge chamber, and the two graphite rods are kept The shaft centers of the rods are on the same straight line, and their other ends are in contact; then the cavity of the DC arc discharge chamber is filled with air at normal pressure (0.1MPa), and the discharge chamber is kept in a sealed state; then energized at the same time Adjust the DC discharge current at 100A for discharge and arc start. During the discharge process, keep the distance between the ends of the cathode and anode at 1 to 10mm, so that the anode and cathode can continuously start and discharge the arc until the graphite rod of the anode is consumed and stops, and the entire discharge The process takes 10 minutes. The black solid matter...

Embodiment 2

[0111] The difference between this example and Example 1 is that the annealing temperature in step 5 was changed to 750°C and 950°C respectively, and the other conditions were the same, and the obtained samples were marked as GH-Fe-N-750, GH-Fe-N-750, GH-Fe- N-950.

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Abstract

The invention discloses a nanocarbon material, a preparation method thereof, and application of the nanocarbon material to fuel cells. The preparation method comprises the steps that composite nanocarbon is dispersed into an alkaline solution containing protoheme, and a hydrothermal reaction and annealing are conducted to obtain the nanocarbon material. The preparation method of the nanocarbon material is simple, and the prepared nanocarbon material has efficient oxygen reduction catalysis performance, and can be applied to air electrode catalysts of the hydrogen-oxygen fuel cell, the zinc airfuel cell, the magnesium air fuel cell and the aluminum air fuel cell.

Description

technical field [0001] The application relates to a nano-carbon material, its preparation method and its application in fuel cells, belonging to the field of nano-materials. Background technique [0002] Fuel cell technology is an energy conversion technology that converts the chemical energy of fuel into electrical energy. Its energy conversion efficiency is high, clean and pollution-free, and has attracted extensive attention from the scientific and industrial circles. In fuel cells, including hydrogen-oxygen fuel cells and metal-air fuel cells, due to the slow kinetics of the oxygen reduction reaction at the cathode, the oxygen reduction catalyst at the cathode becomes a key factor affecting the performance of the battery. At present, the most commonly used cathode oxygen reduction catalysts in fuel cells are mainly Pt-based catalysts, and Pt-based catalysts are considered to be the best type of catalysts for oxygen reduction. However, since a large amount of platinum is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/18C01B32/184C01B32/194H01M4/86H01M4/96B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B2204/04C01B2204/32C01B32/18C01B32/184C01B32/194H01M4/8647H01M4/96Y02E60/50
Inventor 吴初新官轮辉
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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