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

Metal-doped hierarchical porous biochar with three-dimensional frame structure and preparation method of metal-doped hierarchical porous biochar

A technology of metal doping and hierarchical porosity, which is applied in the preparation/purification of carbon, structural parts, non-metallic elements, etc., can solve the problems of lack of macropores and ultra-large pores, and the inability to fully utilize the electrochemical performance of sulfur materials to achieve enhanced Effects of conductivity, improvement of electrochemical performance, and improvement of rate capability

Active Publication Date: 2021-01-29
XIANGTAN UNIV
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The macropore distribution of most biochars is mainly at the nanometer level, and the ultra-large pores are derived from the morphology characteristics of the biomass raw materials. Although carbon with different morphology is rich in micro-mesopores, it lacks macropores and super-macropores, which cannot give full play to the electrochemical performance of sulfur materials.

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
  • Metal-doped hierarchical porous biochar with three-dimensional frame structure and preparation method of metal-doped hierarchical porous biochar
  • Metal-doped hierarchical porous biochar with three-dimensional frame structure and preparation method of metal-doped hierarchical porous biochar
  • Metal-doped hierarchical porous biochar with three-dimensional frame structure and preparation method of metal-doped hierarchical porous biochar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Tremella is used as a raw material, soaked, drained, dried, crushed into fine powder with a crusher, and freeze-dried tremella powder is obtained. Then add 1g white fungus powder, 0.2g potassium hydroxide and 0.2g FeCl 3 (5:1:1), mixed in 60mL deionized water, stirred and ultrasonicated until uniform and viscous mixture was obtained;

[0034](2) Use a high-shear emulsifier to shear and emulsify the viscous mixture in (1), with a rotation speed of 8000r / min and an emulsification time of 10 minutes. Then place the emulsified mixture in a freeze dryer and freeze it at minus 60°C for 4 hours, then seal the drying chamber and vacuumize it so that the pressure in the chamber is 1 Pa, dry it for 48 hours, and dry it thoroughly;

[0035] (3) Put the dry powder in (2) into a porcelain boat, and perform high-temperature carbonization in a tube furnace. The specific process steps of heat treatment are: heating up to 100°C at a heating rate of 5°C / min and holding for 1 hour, ...

Embodiment 2

[0039] (1) Sweet potatoes are used as raw materials, soaked, drained, dried, and crushed into fine powder with a crusher to obtain freeze-dried sweet potato powder. Add 1g of sweet potato powder, 0.2g of potassium hydroxide and 0.2g of FeCl 3 (5:1:1), mixed in 60mL deionized water, stirred and ultrasonicated until uniform and viscous mixture was obtained;

[0040] (2) Use a high-shear emulsifier to shear and emulsify the viscous mixture in (1), with a rotation speed of 8000r / min and an emulsification time of 10 minutes. Then place the emulsified mixture in a freeze dryer and freeze it at minus 60°C for 4 hours, then seal the drying chamber and vacuumize it so that the pressure in the chamber is 1 Pa, dry it for 48 hours, and dry it thoroughly;

[0041] (3) Put the dry powder in (2) into a porcelain boat, and perform high-temperature carbonization in a tube furnace. The specific process steps of heat treatment are: heating up to 100°C at a heating rate of 5°C / min and holding ...

Embodiment 3

[0045] (1) Tremella is used as a raw material, soaked, drained, dried, crushed into fine powder with a crusher, and freeze-dried tremella powder is obtained. Then add 1g white fungus powder, 0.2g potassium hydroxide and 0.2g CoCl 2 ·6H 2 O (5:1:1), mixed in 60mL deionized water, stirred and ultrasonicated until uniform and viscous mixture was obtained;

[0046] (2) Use a high-shear emulsifier to shear and emulsify the viscous mixture in (1), with a rotation speed of 8000r / min and an emulsification time of 10 minutes. Then place the emulsified mixture in a freeze dryer and freeze it at minus 60°C for 4 hours, then seal the drying chamber and vacuumize it so that the pressure in the chamber is 1 Pa, dry it for 48 hours, and dry it thoroughly;

[0047] (3) Put the dry powder in (2) into a porcelain boat, and perform high-temperature carbonization in a tube furnace. The specific process steps of heat treatment are: heating up to 100°C at a heating rate of 5°C / min and holding fo...

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
Specific surface areaaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses metal-doped hierarchical porous biochar with a three-dimensional frame structure and a preparation method of the metal-doped hierarchical porous biochar. The preparation methodcomprises the steps of (1) soaking and draining a biomass raw material, drying, and grinding into powder for later use; (2) adding the biomass raw material powder, soluble metal salt and potassium hydroxide into deionized water, and performing stirring and ultrasonic treatment until the materials are uniformly mixed to obtain a mixed solution; (3) carrying out high-shear emulsification on the mixed solution to obtain an emulsion; and (4) carrying out freeze drying on the emulsion, carbonizing, pickling, filtering and drying to obtain the metal-doped hierarchical porous biochar with the three-dimensional frame structure. The metal-doped hierarchical porous biochar with the three-dimensional frame structure is rich in pore channel structure and can store a large amount of sulfur elements and effectively constrain the sulfur elements, part of amorphous carbon can be converted into graphitic carbon due to the existence of metal particles, the conductivity of a carbon material is enhanced,the synergistic effect of physicochemical adsorption of polysulfide can be achieved, the shuttle effect is effectively inhibited, and the electrochemical performance of the electrode material is improved.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a metal-doped three-dimensional frame structure hierarchical porous biochar and a preparation method thereof. Background technique [0002] Lithium-ion batteries are an excellent energy storage system, but currently commercialized lithium-ion batteries generally have the defect of low energy density. In the high-energy density lithium-ion battery system, the lithium-sulfur battery is one of the most promising next-generation power devices. It uses cheap, earth-abundant, and environmentally friendly sulfur as the cathode and has a high theoretical specific capacity (~1675mAh g -1 ) and energy density (~2600Wh kg -1 ), its specific capacity is about 5 times that of the current lithium-ion battery cathode material. However, so far, the commercial application of lithium-sulfur batteries is still challenging, because sulfur has poor electrical conductivity and ionic conductivity, so...

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
IPC IPC(8): C01B32/05C01B32/914H01M4/62H01M10/052
CPCC01B32/05C01B32/914H01M4/625H01M4/628H01M10/052Y02E60/10
Inventor 雷维新王旭日马增胜许旭鹏汪啸吴雅琴付国立潘勇
Owner XIANGTAN UNIV
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