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

Carbon-nitrogen co-doped Co3O4 composite material and preparation method and application thereof

A composite material and co-doping technology, which is applied in the field of carbon-nitrogen co-doped Co3O4 composite material and its preparation, can solve the problems of poor cycle stability and achieve the effect of improving conductivity, specific capacity value, and ensuring stability

Active Publication Date: 2019-12-20
XIJING UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention is to provide a carbon-nitrogen co-doped Co 3 o 4 Composite material and its preparation method and application, this composite material solves existing Co 3 o 4 For the problem of poor cycle stability, the conductivity, specific capacity and capacity retention of the material can be greatly improved through the carbon-nitrogen co-doping process, and it has good cycle stability

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
  • Carbon-nitrogen co-doped Co3O4 composite material and preparation method and application thereof
  • Carbon-nitrogen co-doped Co3O4 composite material and preparation method and application thereof
  • Carbon-nitrogen co-doped Co3O4 composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A carbon-nitrogen co-doped Co 3 o 4 A method for preparing a composite material, comprising:

[0034] (1) Pour 0.3mol / L glucose solution into a stainless steel autoclave lined with polytetrafluoroethylene, keep it warm at 190°C for 15h, and then add glucose and CoSO at a mass ratio of 4:2 4 ·7H 2 O, heat preservation at 160°C for 26h by hydrothermal method;

[0035] (2) centrifuging the product obtained in step (1), cleaning it with water and ethanol successively, and drying it at 70° C. for 7 hours;

[0036] (3) Put the product obtained in step (2) in an air atmosphere and heat it with a tube furnace at a heating rate of 1°C / min, heat it to 580°C and keep it warm for 2h to obtain an average particle size of 100 (±15) nm Co 3 o4 hollow ball;

[0037] (4) Co prepared in step (3) with a mass ratio of 1:1.5 3 o 4 and 5mg / mL dopamine hydrochloride (Shenzhen Puruikang Biotechnology Co., Ltd.) were dissolved in concentrated hydrochloric acid with a concentration of 9m...

Embodiment 2

[0040] A carbon-nitrogen co-doped Co 3 o 4 The preparation method of composite material is basically the same as the preparation method of embodiment, difference is:

[0041] In step (1), the concentration of glucose solution is 0.8mol / L, and it is incubated at 160°C in a stainless steel autoclave for 18h; glucose and CoSO 4 ·7H 2 The mass ratio of O is 2:2, and the hydrothermal method is kept at 190°C for 20h;

[0042] In step (2), the drying temperature is 90° C., and the drying time is 4 hours;

[0043] In step (3), the heating rate is 3°C / min, heated to 500°C, and the holding time is 5h;

[0044] In step (4), the concentration of dopamine hydrochloride is 0.5mg / mL, Co 3 o 4 The mass ratio of hollow spheres and dopamine hydrochloride is 1:2.5, the concentration of concentrated hydrochloric acid is 11mol / L, let stand for 3h;

[0045] In step (5), in NH 3 Heating to 850°C under atmosphere, holding time is 1h, drying temperature is 70°C.

Embodiment 3

[0047] A carbon-nitrogen co-doped Co 3 o 4 The preparation method of composite material is basically the same as the preparation method of embodiment, difference is:

[0048] In step (1), the concentration of glucose solution is 0.5mol / L, and it is incubated at 180°C for 16h in a stainless steel autoclave; glucose and CoSO 4 ·7H 2 The mass ratio of O is 3:2, and the hydrothermal method is kept at 170°C for 23h;

[0049] In step (2), the drying temperature is 80° C., and the drying time is 5 hours;

[0050] In step (3), the heating rate is 2°C / min, heated to 540°C, and the holding time is 4h;

[0051] In step (4), the concentration of dopamine hydrochloride is 3mg / mL, Co 3 o 4 The mass ratio of hollow spheres and dopamine hydrochloride is 1:2, the concentration of concentrated hydrochloric acid is 10mol / L, let stand for 4h;

[0052] In step (5), in NH 3 Heating to 800°C under atmosphere, the holding time is 2h, and the drying temperature is 60°C.

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 discloses a carbon-nitrogen co-doped Co3O4 composite material and a preparation method and application thereof. The composite material is a carbon-nitrogen co-doped Co3O4 hollow sphere,wherein the particles are of spherical hollow structures, and in an XRD (X-Ray Diffraction) spectrum, characteristic peaks exist when 2(theta) is 19 degrees, 31.3 degrees, 36.9 degrees, 44.8 degrees,55.7 degrees, 59.4 degrees and 65.2 degrees; the C1s XPS spectrogram has a peak at the binding energy of 285.1 eV, and the N1s XPS spectrogram has two peaks at 400.2 eV and 402.6 eV. According to thecomposite material, the conductivity, the specific capacity value and the capacity retention ratio of the material can be greatly improved through a carbon-nitrogen co-doping process, and the composite material has good cycling stability.

Description

technical field [0001] The invention relates to a composite material, in particular to a carbon-nitrogen co-doped Co 3 o 4 Composite materials and their preparation and use. Background technique [0002] With the increasing demand for lithium-ion batteries with high energy density for electric vehicles, it is urgent to develop cathode materials for lithium-ion batteries with superior performance. The cathode material in lithium-ion batteries plays a key role in the specific capacity and energy density of the battery. In the past few decades, various cathode materials have been studied, such as graphite, titanium dioxide, Li 4 Ti 5 o 12 and other metal oxides. Among many cathode materials, metal oxides have attracted much attention due to their large specific capacity and high energy density. [0003] Use Co 3 o 4 Lithium-ion batteries, as cathode materials, release higher energy densities than other cathode materials. Therefore, the researchers developed a Co-based...

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 Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525C01G51/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G51/04C01P2002/72C01P2004/03C01P2004/34C01P2004/64H01M4/362H01M4/523H01M4/625H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 刘守法林东王引卫赵金国
Owner XIJING UNIV