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Preparation method of nickel cobalt oxide nanorod composite material wrapped by carbon having microspheric grading structure

A hierarchical structure and composite material technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as poor conductivity and poor cycle stability, and achieve improved stability, improved conductivity, improved stability and The effect of conductivity

Active Publication Date: 2017-01-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with traditional carbon materials, pure nickel cobalt oxide electrode materials still have defects such as poor conductivity and poor cycle stability.

Method used

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  • Preparation method of nickel cobalt oxide nanorod composite material wrapped by carbon having microspheric grading structure
  • Preparation method of nickel cobalt oxide nanorod composite material wrapped by carbon having microspheric grading structure
  • Preparation method of nickel cobalt oxide nanorod composite material wrapped by carbon having microspheric grading structure

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Experimental program
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Embodiment 1

[0029] A method for preparing a microspherical hierarchical structure carbon-wrapped nickel cobalt oxide nanorod composite material, comprising the following steps:

[0030] (1) ethylene glycol and water are mixed with a volume ratio of 1.5:1 to prepare a mixed solvent;

[0031] (2) Weigh 0.375g of nickel chloride, 0.375g of cobalt chloride, 1.985g of urea and 0.125g of diphthalonitrile and uniformly disperse them in the 50ml mixed solvent prepared in step (1), ultrasonically disperse for 1 hour to form a mixed solution;

[0032] (3) Pour the mixed solution prepared in step (2) into the liner of the crystallization kettle, and crystallize at 200° C. for 5 hours;

[0033] (4) When the crystallization kettle is lowered to room temperature, suction filtration, cleaning, and drying are performed successively to obtain nickel phthalocyanine / cobalt carbonate composite material;

[0034] (5) Calcining the nickel phthalocyanine / cobalt carbonate composite material prepared in step (4...

Embodiment 2

[0041] A method for preparing a microspherical hierarchical structure carbon-wrapped nickel cobalt oxide nanorod composite material, comprising the following steps:

[0042] (1) ethylene glycol and water are mixed with a volume ratio of 1.5:1 to prepare a mixed solvent;

[0043] (2) Weigh 0.375g of nickel chloride, 0.375g of cobalt chloride, 1.985g of urea and 0.125g of diphthalonitrile and uniformly disperse them in the 50ml mixed solvent prepared in step (1), ultrasonically disperse for 1 hour to form a mixed solution;

[0044] (3) Pour the mixed solution prepared in step (2) into the liner of the crystallization kettle, and crystallize at 180° C. for 8 hours;

[0045] (4) When the crystallization kettle is lowered to room temperature, suction filtration, cleaning, and drying are performed successively to obtain nickel phthalocyanine / cobalt carbonate composite material;

[0046] (5) Calcining the nickel phthalocyanine / cobalt carbonate composite material prepared in step (4...

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Abstract

The invention discloses a preparation method of nickel cobalt oxide nanorod composite material wrapped by carbon having a microspheric grading structure. The preparation method comprises steps that mixed solvent of ethylene glycol and water is prepared; nickel chloride, cobalt chloride, urea, and bisphthalonitrile are dispersed; nickel phthalocyanine / cobalt carbonate composite material is acquired after high temperature crystallization; nickel phthalocyanine / cobalt carbonate composite material is calcined. The prepared composite material is a powder-shaped amorphous material, and nickel cobalt oxide crystals wrapped by the carbon exist in the form of the nanorod, and are gathered together to form a microspheric grading structure, and are distributed uniformly. By adopting the above mentioned structure, the conductivity of the nickel cobalt oxide is improved, and the stability of the whole material is improved. When the composite material is used as an electrode material of a super capacitor, the stability and the conductivity of the electrode material are greatly improved. The nickel cobalt oxide nanorod composite material is advantageous in that high specific capacity and good circulation stability are provided; the specific capacity reaches 575F / g, and a capacity retention ratio is kept at 95.2%after 3000 times of charging and discharging; an excellent electrochemical performance is provided.

Description

technical field [0001] The invention belongs to the field of electrode material synthesis, and relates to a method for preparing a carbon-wrapped nickel cobaltate nanorod composite material with a microspherical hierarchical structure. Background technique [0002] Under the double test of resource scarcity and environmental pollution, it is imminent to explore clean and sustainable energy storage components. Supercapacitor, as an excellent electrochemical energy storage device, has attracted much attention due to its many advantages such as high power density, high energy density, high current charge and discharge, and good cycle stability. Widely used in various fields such as electronics, automobiles, energy and aerospace. As an important part of supercapacitors, electrode materials have become one of the research hotspots. [0003] Based on the rapid redox reaction on the electrode surface, transition metal oxide electrode materials have the advantages of high power de...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/46H01G11/44H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/32H01G11/44H01G11/46H01G11/86
Inventor 薛卫东付玉锋王闻谏何东旭赵睿
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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