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Porous carbon composite material containing cobalt and nickel and preparation method of porous carbon composite material containing cobalt and nickel

A composite material and porous carbon technology, which is applied in the field of inorganic nanomaterials and electrochemistry, can solve the problems of high energy consumption and low catalytic activity, and achieve the effect of proper pore size distribution, high specific surface area, and improved electric double layer capacitance

Inactive Publication Date: 2018-08-17
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although ideal catalytically active materials can be obtained by combining low-noble metals and carbon materials, there are still many problems, such as high energy consumption in the preparation process and lower catalytic activity than full-noble metal materials.

Method used

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  • Porous carbon composite material containing cobalt and nickel and preparation method of porous carbon composite material containing cobalt and nickel
  • Porous carbon composite material containing cobalt and nickel and preparation method of porous carbon composite material containing cobalt and nickel
  • Porous carbon composite material containing cobalt and nickel and preparation method of porous carbon composite material containing cobalt and nickel

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Embodiment 1

[0025] A preparation method of a cobalt-nickel porous carbon composite material, comprising the steps of: first mixing cobalt chloride hexahydrate, nickel chloride hexahydrate and polyvinylpyrrolidone in a ratio of 1:1:1 (mass ratio), stirring for 7 hours, Then vacuum distillation quickly removed most of the moisture, and then placed in a vacuum oven for drying. Under the protection of nitrogen atmosphere, carbonize at 800°C for 2 hours. After natural cooling, the pH was washed with deionized water to neutral, and dried to obtain a cobalt-nickel porous carbon composite material. The nitrogen adsorption and desorption performance of the carbon material was tested with a Beste 3H-2000PM2 high-performance specific surface and micropore analyzer, and the specific surface area of ​​the carbon material was 203m 2 / g. Through the XPS test, cobalt and nickel elements were successfully doped into the material, and the mass contents of cobalt and nickel in the material were 2.3% and 3...

Embodiment 2

[0027] A preparation method of a cobalt-nickel porous carbon composite material, comprising the steps of: first mixing cobalt chloride hexahydrate, nickel chloride hexahydrate and polyvinylpyrrolidone in a ratio of 1:1:2 (mass ratio), stirring for 8 hours, Then vacuum distillation quickly removed most of the moisture, and then placed in a vacuum oven for drying. Under the protection of nitrogen atmosphere, carbonize at 800°C for 2 hours. After natural cooling, the pH was washed with deionized water to neutral, and dried to obtain a cobalt-nickel porous carbon composite material. The carbon material has a specific surface area of ​​243.7m 2 / g. The mass contents of cobalt and nickel in the material are 3.2% and 3.8% respectively. figure 1 is the nitrogen adsorption-desorption curve of the nitrogen-containing microporous carbon material obtained in Example 2.

Embodiment 3

[0029] A preparation method of a cobalt-nickel porous carbon composite material, comprising the steps of: first mixing cobalt chloride hexahydrate, nickel chloride hexahydrate and polyvinylpyrrolidone in a ratio of 1:1:3 (mass ratio), stirring for 6 hours, Then vacuum distillation quickly removed most of the moisture, and then placed in a vacuum oven for drying. Under the protection of nitrogen atmosphere, carbonize at 800°C for 2 hours. After natural cooling, the pH was washed with deionized water to neutral, and dried to obtain a cobalt-nickel porous carbon composite material. The carbon material has a specific surface area of ​​221m 2 / g. The mass contents of cobalt and nickel in the material are 3.9% and 4.1% respectively.

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Abstract

The invention discloses a porous carbon composite material containing cobalt and nickel and a preparation method of the porous carbon composite material containing cobalt and nickel. The method includes steps: (1) proportionally dissolving a carbon source, a cobalt-containing compound and a nickel-containing compound into water, stirring, and performing reduced pressure distillation and drying ina vacuum drying oven to obtain a precursor; (2) subjecting the precursor to high-temperature carbonization at 600-900 DEG C in an inert atmosphere; (3) sequentially washing and drying carbonized samples to obtain the porous carbon composite material containing cobalt and nickel. The preparation method is simple, environmentally friendly and convenient for large-scale production. The metal-bearingporous carbon composite material prepared according to the method is appropriate in metal element proportion, high in specific surface area and uniform in pore size distribution and has a promising application prospect in fields of industrial catalysis, electrochemical energy storage and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials and electrochemistry, and relates to a porous carbon composite material containing cobalt and nickel and a preparation method thereof. Background technique [0002] Porous carbon materials are widely used in modern science due to their unique properties and abundant and easy-to-obtain synthetic raw materials. Porous carbon materials refer to a class of materials with carbon as the basic skeleton and different pore structures. Porous carbon materials have a series of characteristics such as high chemical stability, acid and alkali resistance, high temperature resistance, electrical conductivity, and thermal conductivity. Such materials usually have developed pores, high specific surface area, high chemical stability, excellent heat resistance, and heat resistance. Acid-base and unique electronic conductivity properties are one of the indispensable important materials in moder...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/90H01G11/30H01G11/32
CPCH01G11/30H01G11/32H01M4/8647H01M4/9041H01M4/9083Y02E60/50
Inventor 韩生陈静韦焕明蔺华林陈海军薛原邱丰余焓李原婷
Owner SHANGHAI INST OF TECH
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