Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Three-dimensional porous carbon material and preparation thereof, and application of three-dimensional porous carbon material in sodium ion battery

A three-dimensional porous, carbon material technology, applied in nanotechnology for materials and surface science, carbon preparation/purification, battery electrodes, etc. Super strong structural stability, high cross-linking degree and excellent sodium storage performance

Active Publication Date: 2018-04-27
湖南宸宇富基新能源科技有限公司
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of poor structural stability of carbon nanosheets, easy agglomeration and stacking, etc., the first purpose of the present invention is to provide a three-dimensional porous carbon material, which aims to improve the structure of a stable, porous carbon 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
  • Three-dimensional porous carbon material and preparation thereof, and application of three-dimensional porous carbon material in sodium ion battery
  • Three-dimensional porous carbon material and preparation thereof, and application of three-dimensional porous carbon material in sodium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Put 10 g of smectite ore in a solution (aqueous solution of alkali) with a pH of 8.5 for ultrasonic dispersion, put 1 g of dopamine in the above solution, control the polymerization temperature to 30 ° C, and control the polymerization time to 40 h, and the obtained precursor is carbonized. Inert gas protection is introduced, carbonization (heat treatment) is performed at a temperature of 400° C. for 1 hour, and the resulting product is washed with hot sodium hydroxide to obtain a carbon nanosheet material. The obtained carbon nanosheet material was added to a solution with a CTAB (cetyltrimethylammonium bromide) concentration of 1 g / L, ultrasonically dispersed, placed in a hydrothermal reaction kettle, and the hydrothermal reaction temperature was controlled to be 200 ° C. The thermal reaction time is 12h. The obtained hydrothermal product is heat-treated, protected by inert gas, and the carbonization temperature is 1000° C. for 2 hours to obtain a three-dimensional po...

Embodiment 2

[0056] Compared with Example 1, the only difference is that the carbonization (heat treatment) temperature after the hydrothermal reaction is 500°C. The thickness of the obtained carbon nanosheets is concentrated at about 60nm, and the specific surface area of ​​the obtained airgel material is 1540m 2 / g.

[0057] The three-dimensional porous carbon material prepared in this example was used as the working electrode, sodium was used as the counter electrode, and a button battery was assembled, and the capacity performance was tested at a current density of 50 mA / g. The test results show that the sodium ion battery negative electrode prepared in this example has good electrochemical properties: at a flow density of 50mA / g, after 100 cycles, the specific capacity of 202mA / g can still be maintained (the capacity retention rate is 98%).

Embodiment 3

[0059] Put 20g of smectite ore in a solution with a pH of 8.5 for ultrasonic dispersion, put 1g of dopamine in the above solution, control the polymerization temperature at 50°C, and control the polymerization time at 20h. The obtained precursor is carbonized and protected by inert gas. , the carbonization treatment temperature is 500° C., and the time is 2 hours. The obtained product is washed with hot sodium hydroxide to obtain a carbon nanosheet material. The obtained carbon nanosheet material was added to a solution with a CTAB concentration of 0.5 g / L, ultrasonically dispersed, placed in a hydrothermal reaction kettle, and the hydrothermal reaction temperature was controlled at 160° C., and the hydrothermal reaction time was 24 hours. The obtained hydrothermal product was heat-treated, protected by inert gas, and the carbonization temperature was 1100° C. for 4 hours to obtain a three-dimensional porous carbon material. The thickness of carbon nanosheets is concentrated a...

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
thicknessaaaaaaaaaa
concentrationaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention specifically discloses a three-dimensional porous carbon material, belonging to the field of sodium ion battery materials. The three-dimensional porous carbon material is composed of carbon nanosheets and has a specific surface area of 100-2000 m<2> / g, and the thickness of the carbon nanosheets is in a range of 10-100 nm. The invention also discloses a preparation method for the three-dimensional porous carbon material. The preparation method comprises the following steps: subjecting dopamine and montmorillonite to a polymerization reaction in a solution to obtain a precursor;subjecting the precursor to heat treatment and washing to obtain a layered carbon nanosheet material; and subjecting the layered carbon nanosheet material to a hydrothermal reaction in a solution witha positive surfactant dissolved therein, and then carbonizing a hydrothermal reaction product so as to obtain the three-dimensional porous carbon material. The method uses easily available raw materials, is simple in preparation process and has good repeatability; and the prepared three-dimensional porous carbon material has the advantages of rich pores, a high degree of cross-linking, stable structure, a large specific surface area, good conductivity and the like, and shows good battery performance when applied to sodium ion batteries.

Description

technical field [0001] The invention relates to a negative electrode material of a sodium ion battery, in particular to a three-dimensional porous carbon material used as the negative electrode material of a sodium ion battery. Background technique [0002] Sodium-ion batteries have become a research hotspot in the new generation of secondary battery systems due to their rich sodium reserves. Compared with lithium-ion batteries, sodium-ion batteries have problems such as high negative electrode voltage and large radius of sodium ions, which pose many difficulties for the development of high-efficiency sodium-ion batteries. Electrode materials determine important parameters such as battery capacity, operating voltage, and cycle life. Although the reaction mechanism in sodium-ion batteries is similar to that in lithium-ion batteries, however, sodium ions are about 55% larger than lithium ions, and the intercalation and diffusion of sodium ions in materials with the same struc...

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): C01B32/05H01M4/583H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/583H01M10/054Y02E60/10
Inventor 张治安陈玉祥李劼赖延清尹盟肖志伟
Owner 湖南宸宇富基新能源科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com