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Porous core-shell nano composite material and preparation method thereof

A nanocomposite material and porous core technology, applied in the field of porous core-shell nanocomposite materials and their preparation, can solve the problems of unsuitability for industrialized mass production, poor controllability, complex preparation process, etc. Effective, easy to control process conditions, improved electrochemical performance

Inactive Publication Date: 2018-06-29
成都格力钛新能源有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ordinary molten salt method prepares porous carbon nanomaterials. Compared with hydrothermal carbon nanomaterials, the degree of carbonization is higher. However, under many processing conditions, only large flake graphite materials can be obtained, and it is difficult to obtain porous carbon materials such as massive and spherical. carbon nanomaterials
The invention patent with the publication number CN104176765A discloses a molten salt method for preparing ZnO nanomaterials with different shapes, which can produce short linear, needle, bamboo shoot and short columnar ZnO nanomaterials, and the product shape is controllable and mass-produced. However, the process control is complex and not suitable for industrial mass production
[0003] Metal oxide@porous carbon composites can be used as catalysts, Li-ion batteries (LIBs) and supercapacitor electrode materials, etc., and have great application potential in the field of energy and environment. Poor controllability, not suitable for industrial mass production, how to develop a preparation method, which is simple and mass-producible, can control the shape and size of metal oxide@carbon composite materials, so as to expand its performance, is currently to be solved technical challenge

Method used

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  • Porous core-shell nano composite material and preparation method thereof
  • Porous core-shell nano composite material and preparation method thereof
  • Porous core-shell nano composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0045] A kind of Co 3 o 4 The preparation method of @C porous core-shell nanocomposite material, comprises the steps:

[0046] (1) According to Co(NO 3 ) 2 ·6H 2 O: Glucose mass ratio is 1:2, 1:1, 2:1 (respectively corresponding to the material Co in Table 1 3 o 4 @C-1、Co 3 o 4 @C-2、Co 3 o 4 @C-3), and sodium chloride are dissolved in deionized water together, and the mixed solution is first heated and stirred on a magnetic stirrer until there are no solid particles, and a red uniform solution is obtained. The concentration of sodium chloride in the solution is 10-20 %;

[0047](2) Boil the stirred solution for 0.5 hours first, let the glucose denature and increase the viscosity to complex metal ions, then put it into a 60-95°C constant temperature magnetic stirring water bath, evaporate and stir for 2-6 hours, until the solution is dark red or Black, when the color of the solution becomes darker and blacker, stop the magnetic stirring, continue to heat in the water...

Embodiment 2

[0057] A method for preparing a NiO@C porous core-shell nanocomposite material, comprising the steps of:

[0058] (1) According to Ni (NO 3 ) 2 ·6H 2 The mass ratio of O:glucose is 1:2, 1:1, 2:1 (respectively corresponding to the materials NiO@C-1, NiO@C-2, NiO@C-3 in Table 2), and sodium chloride is dissolved in In deionized water, heat and stir the mixed solution on a magnetic stirrer until there are no solid particles to obtain a green uniform solution, the concentration of sodium chloride in the solution is 10-20%;

[0059] (2) Boil the stirred solution for 0.5 hours first, let the glucose denature and increase the viscosity to complex metal ions, then put it into a constant temperature magnetic stirring water bath at 80-95°C, evaporate and stir for 2-6 hours, until the solution is dark green or Dark green, when the color of the solution turns dark and black, stop the magnetic stirring, continue to heat in the water bath until the viscosity increases, and there are no l...

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Abstract

The invention relates to a porous core-shell nano composite material and a preparation method. The porous core-shell nano composite material is MxOy@C with a controlled shape size, and a porous carbonnanostructure shell layer uniformly covers the surface of an MxOy nanoparticle. The porous carbon nanostructure is a carbon nanosheet, nanoblock or nanosphere; M is any metal selected from the groupconsisting of Co and Ni, when M is Co, x is equal to 3, and y is equal to 4; when M is Ni, x is equal to 1, and y is equal to 1. The preparation method comprises the steps: dissolving soluble M metalsalt, glucose and sodium chloride together; stirring and heating to form a viscous material; drying and grinding to obtain sodium chloride coated M metal salt-glucose composite crystalline powder; obtaining the porous carbon-coated M metal oxide core-shell composite material by calcination in an argon atmosphere and oxidation in the air. The preparation process is simple, the process is easy to control, the method is suitable for industrial mass production, and the prepared product can be used for various purposes such as electrode materials, catalyst materials, supercapacitor materials and the like.

Description

technical field [0001] The invention relates to the field of nanocomposite materials, in particular to the field of core-shell nanocomposite materials, in particular to a porous core-shell nanocomposite material and a preparation method thereof. Background technique [0002] With the rapid development of carbon nanomaterials, porous carbon nanomaterials have aroused great interest of researchers in various fields because of the existence of a large number of pores, large specific surface area and unique framework composition. In recent years, porous carbon nanomaterials have been widely used in the field of electrochemistry, such as electrocatalytic catalysts and electrode materials for capacitors. The ordinary molten salt method prepares porous carbon nanomaterials. Compared with hydrothermal carbon nanomaterials, the degree of carbonization is higher. However, under many processing conditions, only large flake graphite materials can be obtained, and it is difficult to obta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J13/04B01J13/06B82Y40/00B82Y20/00H01M4/36H01M4/52H01M4/62H01M10/0525H01G11/30H01G11/36H01G11/46H01G11/86B01J23/75B01J23/755
CPCB01J13/02B01J13/043B01J13/06H01M4/366H01M4/523H01M4/62H01M4/625H01M10/0525H01G11/30H01G11/36H01G11/46H01G11/86B82Y20/00B82Y40/00B01J23/75B01J23/755B01J35/398B01J35/33Y02E60/13Y02E60/10
Inventor 徐冬阳谢墨尹华歧
Owner 成都格力钛新能源有限公司