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

Method for preparing three-dimensional porous microspheres surrounded by nitrogen/sulfur co-doped carbon nanosheets with embedded metal/carbon yolk shell structure

A carbon nanosheet, three-dimensional porous technology, applied in the direction of structural parts, active material electrodes, electrical components, etc., can solve the problems of limited industrial application, stay, complex process, etc., to promote practical application, cost saving, high continuity. Effect

Active Publication Date: 2022-05-10
TIANJIN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development and application of negative electrode materials mostly stay in the basic research stage, due to the low output of the preparation process (hydrothermal, solvothermal and electrospinning, etc.), the process is complicated and expensive, making it difficult to industrialize production
Another key problem is that it is difficult for the products obtained by many preparation schemes to have stable cycle performance under high current when used as the negative electrode of lithium / sodium ion batteries, which greatly limits the possibility of industrial application.

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
  • Method for preparing three-dimensional porous microspheres surrounded by nitrogen/sulfur co-doped carbon nanosheets with embedded metal/carbon yolk shell structure
  • Method for preparing three-dimensional porous microspheres surrounded by nitrogen/sulfur co-doped carbon nanosheets with embedded metal/carbon yolk shell structure
  • Method for preparing three-dimensional porous microspheres surrounded by nitrogen/sulfur co-doped carbon nanosheets with embedded metal/carbon yolk shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to Sb 3+ :C and C:Na + The ratio of the amount of substance is 1:15 and 28:100, the 0.95g (CH 3 COO) 3 Sb, 1.94 g of C 6 h 5 o 7 (NH 4 ) 3 and 10g of NaCl were dissolved in 80mL of deionized water, stirred at room temperature for 9h to ensure that C 6 h 5o 7 (NH 4 ) 3 Fully complexed with metal salts. The obtained homogeneous solution was spray-dried by a spray dryer, and the inlet and outlet air temperatures of the spray dryer were 175°C and 90°C, respectively. In the process, by (CH 3 COO) 3 Sb, C 6 h 5 o 7 (NH 4 ) 3 Self-assemble with NaCl to form a hollow sphere, and the size of the sphere is normally distributed. Due to the rapid volatilization of water on the surface of the droplet at high temperature, the water inside the droplet migrates to the surface with NaCl, leading to its self-assembly in a very short time to form the precursor NaCl@(CH 3 COOH) 3 Sb-C 6 h 5 o 7 (NH 4 ) 3 . The precursor is placed in the middle of the t...

Embodiment 2

[0031] According to Sb 3+ :C and C:Na + The ratio of the amount of substance is 1:15 and 28:100, the 4.3g (CH 3 COO) 3 Sb, 8.74 g of C 6 h 5 o 7 (NH 4 ) 3 and 45g of NaCl were dissolved in 355mL of deionized water, stirred at room temperature for 6h to ensure that C 6 h 5 o 7 (NH 4 ) 3 Fully complexed with metal salts. The obtained homogeneous solution was spray-dried by a spray dryer, and the inlet and outlet air temperatures of the spray dryer were respectively 180°C and 90°C. Place the precursor in the middle of the tube furnace, and place the excess thiourea in the upstream. First pass argon to remove the air, then raise the temperature to 280°C at 1°C / min, keep it for 100min; then raise the temperature to 450°C at 5°C / min , and then replaced with 15% hydrogen-argon mixed gas for 2h; then the carrier gas was replaced with pure argon, and then the temperature was raised to 600°C at 5°C / min, kept for 2h and then cooled to room temperature to obtain the calcined ...

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

No PUM Login to View More

Abstract

The invention provides a method for preparing three-dimensional porous microspheres surrounded by nitrogen / sulfur co-doped carbon nanosheets with embedded metal / carbon yolk shell structure, comprising the following steps: preparing precursors: selecting antimony acetate, ammonium citrate and Sodium chloride is mixed and dissolved in deionized water as a raw material, and the resulting uniform mixed solution is sprayed into balls by a spray dryer to prepare a precursor; to prepare a nitrogen / sulfur co-doped carbon nanometer embedded with an antimony / carbon egg yolk shell structure Three-dimensional porous microsphere composite material surrounded by sheets: the precursor prepared in step 1 is placed in the middle of the tube furnace, and the thiourea is placed in the upstream. A three-dimensional porous microsphere composite surrounded by doped carbon nanosheets. The prepared three-dimensional porous microsphere composite surrounded by nitrogen / sulfur co-doped carbon nanosheets embedded with antimony / carbon egg yolk shell structure is used as the anode for sodium-ion batteries.

Description

technical field [0001] The invention relates to a method for preparing three-dimensional porous microspheres surrounded by nitrogen / sulfur co-doped carbon nanosheets with embedded metal / carbon egg yolk shell structure by spray drying method, and can exhibit super The invention has high performance and belongs to the fields of nanocomposite material preparation technology and battery application technology. Background technique [0002] With people's high attention to the utilization of renewable energy, the development and application of lithium / sodium ion batteries is imminent. At present, the preparation process of lithium / sodium ion battery cathode materials is becoming more and more perfect, and the performance basically meets the needs of industrialization. However, the development and application of negative electrode materials mostly stays in the basic research stage, and due to the low output of the preparation process (hydrothermal, solvothermal and electrospinning...

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): H01M4/36H01M4/38H01M4/583H01M10/054H01M4/02
CPCH01M4/362H01M4/583H01M4/38H01M10/054H01M2004/027H01M2004/021Y02E60/10
Inventor 何春年陈伯超赵乃勤师春生刘恩佐马丽颖何芳
Owner TIANJIN UNIV