Unlock instant, AI-driven research and patent intelligence for your innovation.

Cobalt selenide nickel nitrogen doped amorphous carbon nanocomposite anode material and its preparation and application

A cobalt-nickel-nitrogen selenide and amorphous carbon technology, applied in the field of materials, can solve the problems of reducing the sodium storage performance of materials and having many impurities

Active Publication Date: 2021-09-10
SHANGHAI UNIV OF ENG SCI
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intermediate product in the patent CN105609322B is directly selenized without washing and drying, and the final product obtained has many impurities, which will greatly reduce the sodium storage performance of the material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cobalt selenide nickel nitrogen doped amorphous carbon nanocomposite anode material and its preparation and application
  • Cobalt selenide nickel nitrogen doped amorphous carbon nanocomposite anode material and its preparation and application
  • Cobalt selenide nickel nitrogen doped amorphous carbon nanocomposite anode material and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A cobalt-nickel-nitrogen-doped amorphous carbon nanocomposite negative electrode material, in which carbon is used as a skeleton, amorphous and doped with nitrogen, the particle size of the composite material is 80-150nm, and the entire material forms a porous structure. Prepared by the following steps:

[0039] Step 1. Ni / Co-ZIF-67 nanocubes were prepared using a simple liquid phase method. First, 2mmol (0.5821g) of Co(NO 3 ) 2 ·6H 2 O, 1mmol (0.2908g) of Ni(NO 3 ) 2 ·6H 2 O and 20mg cetyltrimethylammonium bromide (CTAB) are added in 25mL water to form an aqueous solution;

[0040] Step 2. Quickly pour the above solution into 175mL 2-methylimidazole aqueous solution (11.3g), then stir it at room temperature at a speed of 3000-5000r / min for 60min, and then let it stand at room temperature for 24h to obtain a suspension liquid;

[0041] Step 3: Vacuum filter the above suspension for 10-20 minutes to obtain a precipitate, which is washed three times with deionized...

Embodiment 2

[0049] A cobalt-nickel-nitrogen-doped amorphous carbon nanocomposite negative electrode material, in which carbon is used as a skeleton, amorphous and doped with nitrogen, the particle size of the composite material is 80-150nm, and the entire material forms a porous structure. Prepared by the following steps:

[0050] Step 1. NiCo-ZIF-67 nanocubes were prepared using a simple liquid-phase method. First, 2mmol (0.5821g) of Co(NO 3 ) 2 ·6H 2 O, 1mmol (0.2908g) of Ni(NO 3 ) 2 ·6H 2 O and 20mg cetyltrimethylammonium bromide (CTAB) are added in 25mL water to form an aqueous solution;

[0051] Step 2. Quickly pour the above solution into 175mL 2-methylimidazole aqueous solution (11.3g), then stir it at room temperature at a speed of 3000-5000r / min for 40min, and then let it stand at room temperature for 24h to obtain a suspension liquid;

[0052] Step 3: Vacuum filter the above suspension for 10-20 minutes to obtain a precipitate, wash the precipitate with deionized water a...

Embodiment 3

[0057] A cobalt-nickel-nitrogen-doped amorphous carbon nanocomposite negative electrode material, in which carbon is used as a skeleton, amorphous and doped with nitrogen, the particle size of the composite material is 80-150nm, and the entire material forms a porous structure. Prepared by the following steps:

[0058] Step 1. NiCo-ZIF-67 nanocubes were prepared using a simple liquid-phase method. First, 2mmol (0.5821g) of Co(NO 3 ) 2 ·6H 2 O, 1mmol (0.2908g) of Ni(NO 3 ) 2 ·6H 2 O and 20mg cetyltrimethylammonium bromide (CTAB) are added in 25mL water to form an aqueous solution;

[0059] Step 2. Quickly pour the above solution into 175mL 2-methylimidazole aqueous solution (11.3g), then stir it at room temperature at a speed of 3000-5000r / min for 40min, and then let it stand at room temperature for 12h to obtain a suspension liquid;

[0060] Step 3: Vacuum filter the above suspension for 10-20 minutes to obtain a precipitate, which is washed with deionized water and ab...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a cobalt-nickel-nitrogen-doped amorphous carbon nanocomposite negative electrode material and its preparation and application. The preparation method specifically includes the following steps: (a) taking a cobalt source, a nickel source and cetyltrimethyl Ammonium bromide is added to 2-methylimidazole aqueous solution, stirred to form a mixed solution, then left to stand and separated to obtain a precipitate, which is then washed and dried to obtain NiCo-ZIF-67; (b) adopting the selenization step of simple selenium (a) The obtained NiCo-ZIF-67 is washed and dried to obtain the cobalt-nickel-nitrogen-doped amorphous carbon nanocomposite negative electrode material. The cobalt-nickel-nitrogen-doped amorphous carbon nanocomposite negative electrode material is made into a sodium ion battery negative electrode sheet, and then assembled with a metal sodium sheet and an electrolyte to form a sodium ion battery. Compared with the prior art, the nanocomposite negative electrode material of the invention improves the electrochemical performance of the battery, has excellent electrochemical sodium storage performance, and is a good negative electrode material for the sodium ion battery.

Description

technical field [0001] The invention relates to the field of materials, in particular to a cobalt-nickel-nitrogen-doped amorphous carbon nanocomposite negative electrode material and its preparation and application. Background technique [0002] Li-ion batteries have attracted the interest of researchers as an important energy storage device in electrical devices, however, due to the limited resources of lithium, it is urgent to find alternatives to Li-ion batteries. Since both sodium and lithium belong to the same main group, have similar physical and chemical properties, and the storage of sodium is large and the price is much lower than that of lithium, sodium-ion batteries have been extensively studied in recent years. [0003] The properties of sodium-ion batteries mainly depend on the electrode materials. Limited by the larger radius of sodium ions (102pm), the kinetic characteristics of traditional electrode materials are not ideal. Therefore, in order to make sodium-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/58H01M10/054
CPCH01M4/364H01M4/525H01M4/58H01M10/054H01M2004/027Y02E60/10
Inventor 李兰杰赵家昌朱亚琴徐菁利
Owner SHANGHAI UNIV OF ENG SCI