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A preparation method for transition metal carbon nano composite materials

A technology of composite materials and transition metals, which is applied in the field of preparation of transition metal carbon nanocomposites, can solve the problems of reduced lithium storage performance, volume change, poor conductivity, etc., and achieve increased specific surface area, improved conductivity, and good cycle performance Effect

Active Publication Date: 2016-12-14
威海南海碳材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to address the defects that current transition metal oxides and mixed transition metal oxides are directly used as electrode materials with poor conductivity, and large volume changes are prone to occur during charge and discharge cycles, resulting in a significant reduction in lithium storage performance. , provides a preparation method of transition metal carbon nanocomposites, the method uses apricot core shell as carbon source, after carbonization, it is modified by plant hyaluronic acid tremella polysaccharide, nickel element is deposited in situ, and transition metal carbon is obtained after calcination Nanocomposite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021]Weigh 1 kg of apricot core shells and wash them with absolute ethanol and deionized water for 10 minutes respectively, put them in an oven to dry, and then transfer them to a jet mill for crushing, screen out particles with a particle size of 1 mm, and then grind them according to a solid-to-liquid ratio of 1:3. Apricot core shell particles and dodecyltrimethylammonium chloride solution with a mass concentration of 3%, placed on a shaker and soaked overnight; after the soaking was completed, the filter residue was filtered and washed with a concentration of 1mol / L sodium hydroxide solution for 3 Then dry it naturally, put the dried filter residue into a carbonization furnace, heat it up to 500°C under the protection of nitrogen, keep it warm and carbonize for 2 hours to get apricot core-shell carbon particles, put it into a ball mill and grind it for 1 hour, and pass through 200°C. Mesh standard sieve, i.e. porous apricot core-shell carbon powder, for subsequent use; take...

example 2

[0024] Weigh 2 kg of apricot core shells and wash them with absolute ethanol and deionized water for 13 minutes respectively, put them in an oven to dry, and then transfer them to a jet mill for crushing, screen out particles with a particle size of 1 mm, and then grind them according to the solid-liquid ratio of 1:3. Apricot core shell particles and dodecyltrimethylammonium chloride solution with a mass concentration of 3%, placed on a shaker and oscillated and soaked overnight; after the soaking was completed, filter the filter residue and rinse it with a 1mol / L sodium hydroxide solution for 4 Then dry it naturally, put the dried filter residue into a carbonization furnace, heat it up to 600°C under the protection of nitrogen, keep it warm and carbonize for 2 hours to get apricot core-shell carbon particles, put it into a ball mill for 1 hour, and pass through 200°C. Mesh standard sieve, i.e. porous apricot core-shell carbon powder, for subsequent use; take 2kg white fungus a...

example 3

[0027] Weigh 2 kg of apricot core shells and rinse them with absolute ethanol and deionized water for 15 minutes respectively, put them in an oven to dry, and then transfer them to an airflow mill for crushing, screen out particles with a particle size of 2 mm, and then grind them according to a solid-to-liquid ratio of 1:3. Apricot core shell particles and dodecyltrimethylammonium chloride solution with a mass concentration of 3%, placed on a shaker and soaked overnight; after the soaking was completed, the filter residue was filtered and washed with a concentration of 1mol / L sodium hydroxide solution for 5 Then dry it naturally, put the dried filter residue into a carbonization furnace, heat it up to 700°C under the protection of nitrogen, keep warm and carbonize for 3 hours to get apricot core-shell carbon particles, put it into a ball mill and grind it for 2 hours, and pass through 200°C. Mesh standard sieve, i.e. porous apricot core-shell carbon powder, for subsequent use;...

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Abstract

The invention relates to a preparation method for transition metal carbon nano composite materials, and belongs to the field of electrode material preparation. The method comprises the following steps: almond core shell is used as a carbon source, then carbonized and further modified by plant hyaluronic acid tremella polysaccharide and further subjected to nickel element in-situ deposition and calcination to prepare transition metal carbon nano composite materials. According to the invention, the almond core shell is soaked with a quaternary ammonium salt solution to increase the porosity, and after carbonization, the almond core shell is biologically modified by tremella fuciformis rich in active hydroxyl groups and carboxyl groups to increase active deposition sites on the carbon base surface. The carbon base is coated with a layer of nickel ions through in-situ deposition method. A nickel oxide layer is formed on the surface of the carbon base after calcinations to obtain porous nickel oxide carbon based composite materials which have characteristics of high capacitance of the metal oxide and high conductivity and stable properties of the carbon material and are electrode materials with excellent performance.

Description

technical field [0001] The invention relates to a preparation method of a transition metal carbon nanocomposite material, belonging to the field of electrode material preparation. Background technique [0002] Supercapacitor is currently the most ideal rechargeable battery. It not only has the characteristics of high energy density, no memory effect, long cycle life, etc., but also has low pollution and meets environmental protection requirements. With the advancement of technology, supercapacitors have been widely used in fields such as electric vehicles, aerospace, and biomedical engineering. Therefore, it is of great significance to research and develop supercapacitor related materials. For supercapacitors, the key is to increase power density and energy density, and the root of power density and energy density is the electrode material, which plays a vital role in improving the performance of supercapacitors. [0003] Both transition metal oxides and mixed transition me...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/46H01G11/36H01G11/24B82Y30/00
CPCY02E60/13H01G11/86B82Y30/00H01G11/24H01G11/36H01G11/46
Inventor 金峰林茂平
Owner 威海南海碳材料有限公司
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