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Composite electrode material and preparation method and application thereof

A composite electrode and composite material technology, applied in the direction of electrodes, nanotechnology for materials and surface science, battery electrodes, etc., can solve the problems of poor intrinsic activity, reduce pollution and danger, and make the synthesis process green and The effect of improving electrical conductivity

Inactive Publication Date: 2019-03-29
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although carbon nanotubes have many advantages, their intrinsic activity is poor, and they are generally only used as supports for other catalysts.

Method used

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  • Composite electrode material and preparation method and application thereof
  • Composite electrode material and preparation method and application thereof
  • Composite electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] N-GCNTs / Fe 3 The preparation method of Ni nanocomposite material comprises the following steps:

[0046] (1) Mix and dissolve 0.145g nickel nitrate hexahydrate, 0.606g ferric nitrate nonahydrate, 4g melamine and 0.05g glucose in 20mL distilled water, stir for 60min, so that the three substances are evenly mixed; after evaporating and drying at 40°C, carry out Grinding to obtain a composite precursor;

[0047] (2) Put the obtained precursor in a tube furnace and calcinate in a nitrogen atmosphere at 500°C for 120min with a heating time of 500min; continue to heat up to 800°C for 120min with a heating time of 150min.

[0048] Through research, we synthesized the steps and mechanism of this method ( figure 1 a) is described as: first coordinate metal ions by organic carbon sources and nitrogen sources, and then calcine at 500°C to form C 3 N 4 / metal particle intermediate, further calcined at 800 °C, N-GCNTs / Fe catalyzed by metal nanoparticles can be obtained 3 Ni. ...

Embodiment 2

[0054] N-GCNTs / Fe 2 The preparation method of Ni nanocomposite material comprises the following steps:

[0055] (1) Mix and dissolve 0.193g nickel nitrate hexahydrate, 0.539g ferric nitrate nonahydrate, 4g melamine and 0.05g glucose in 20mL of distilled water, stir for 60min, so that the three substances are mixed evenly; grind after evaporating and drying at 40°C , to obtain the composite precursor.

[0056] (2) Put the obtained precursor in a tube furnace and calcinate in a nitrogen atmosphere at 500°C for 120min with a heating time of 500min; continue to heat up to 800°C for 120min with a heating time of 150min.

[0057] From the XRD pattern ( Figure 5 ), it can be seen that N-GCNTs / Fe 2 The crystal form of Ni is compared with the N-GCNTs / Fe of embodiment 1 3 Ni is similar, indicating that its structure is similar. SEM( Figure 7 ) shows that its morphology is similar to that of N-GCNTs / Fe 3 Ni approximation, but significant agglomeration also occurs. It can be see...

Embodiment 3

[0059] The preparation method of N-GCNTs / FeNi nano composite material comprises the following steps:

[0060] (1) Mix and dissolve 0.290 g of nickel nitrate hexahydrate, 0.404 g of ferric nitrate nonahydrate, 4 g of melamine and 0.05 g of glucose in 20 mL of distilled water, and stir for 60 min to make the three substances evenly mixed. After evaporating and drying at 40 °C, grinding was carried out to obtain the composite precursor.

[0061] (2) Put the obtained precursor in a tube furnace and calcinate in a nitrogen atmosphere at 500°C for 120min with a heating time of 500min; continue to heat up to 800°C for 120min with a heating time of 150min.

[0062] From the XRD pattern ( Figure 5 ), it can be seen that the crystal form of N-GCNTs / FeNi is better than that of N-GCNTs / FeNi in Example 1 3 Ni is less Fe 2 The peaks of C and elemental Fe indicate that its structure can be regulated by changing the composition. while SEM( Figure 8 ) shows that its general morphology i...

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Abstract

The invention discloses a composite electrode material and a preparation method and application thereof and relates to the technical field of energy conversion and storage materials. The composite electrode material is a core-shell nanometer tubular composite material formed by coating nickel-iron alloy nanometer particles with graphitized carbon nanometer tubes with nitrogen atoms being doped therein. The nitrogen atoms are doped into carbon layers of the graphitized carbon nanometer tubes. The molar ratio of Fe to Ni in the nickel-iron alloy nanometer particles ranges from 3:1 to 1:3. The composite electrode material is excellent in HER, OER and ORR functional catalytic performance and good in stability; raw materials are low in cost; the preparation method is simple and effective; the synthesis process is environmentally friendly and controllable; the material can be massively produced conveniently; and the quite good practical application prospect is achieved in all-water splittingdecomposition and zinc-air batteries.

Description

technical field [0001] The invention relates to the technical field of energy conversion and storage materials, in particular to a composite electrode material and its preparation method and application. Background technique [0002] In recent years, due to the large-scale use of petroleum resources, a series of global environmental problems have been caused. The development of clean energy technology is considered as a way to mitigate global climate change and improve people's quality of life. Among various studies, energy conversion technologies have attracted extensive attention from academia and industry. In energy conversion technology, the hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) of water electrolysis have become the focus of current research. Water can be decomposed into hydrogen and oxygen through HER and OER. The hydrogen generated by cathode HER is an excellent clean fuel, and the oxygen generated by a...

Claims

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Application Information

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IPC IPC(8): B22F9/20B22F1/02H01M4/90H01M12/08C25B11/06B01J31/28B82Y30/00
CPCH01M4/9041H01M4/9083H01M12/08B82Y30/00B01J31/28B22F9/20C25B11/091B22F1/16Y02E60/10
Inventor 刘兆清黄灿王铸欧阳婷肖抗李楠
Owner GUANGZHOU UNIVERSITY
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