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

Preparation method of sea urchin-shaped titanium dioxide multistage microsphere negative electrode material

A technology of titanium dioxide and negative electrode material, applied in the direction of titanium dioxide, titanium oxide/hydroxide, negative electrode, etc., can solve the problems of slow diffusion of lithium ions, poor kinetic reaction, poor cycle performance, etc., to achieve non-toxic and harmless raw materials, The effect of improving pseudocapacitance characteristics and controllable preparation process

Active Publication Date: 2021-06-01
SHAANXI UNIV OF SCI & TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a preparation method of sea urchin-like titanium dioxide multi-level microsphere negative electrode material, to improve TiO2(B) Disadvantages such as poor cycle performance, poor conductivity, slow diffusion of lithium ions, and poor kinetic reaction

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
  • Preparation method of sea urchin-shaped titanium dioxide multistage microsphere negative electrode material
  • Preparation method of sea urchin-shaped titanium dioxide multistage microsphere negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] A preparation method of a sea urchin-like titanium dioxide multi-level microsphere negative electrode material, comprising the following steps:

[0029] 1) Add 1.8 mL of oleylamine dropwise to a beaker containing 200 mL of ethanol, place the beaker on a magnetic stirring table, and stir for 20 minutes;

[0030] 2) Slowly add 4.5mL tetra-n-butyl titanate to the solution obtained in step 1), and stir for 20min at the same time; after stirring evenly, add 0-10.5mL tetraethyl orthosilicate and 0.8mL H 2 0, stirred for 2h, took off the beaker and left it in the dark for 12h, and obtained a white precipitate after washing three times with deionized water;

[0031] 3) Dry the white precipitate obtained in step 2) in an oven at 60°C for 12h, and then calcinate it in a muffle furnace at 450°C for 2h to obtain TiO 2 / SiO 2 Precursor;

[0032] 4) with the TiO obtained in step 3) 2 / SiO 2 Take 0.2g of the precursor and disperse it in 2mol L -1 , 50mL of KOH aqueous solution, ...

Embodiment 1

[0038] 1) Add 1.8 mL of oleylamine dropwise to a beaker containing 200 mL of ethanol, place the beaker on a magnetic stirring table, and stir for 20 minutes;

[0039] 2) Slowly add 4.5mL tetra-n-butyl titanate to the solution obtained in step 1), and stir for 20min at the same time; add 0.8mL H 2 0, stirred for 2h, left standstill for 12h after taking off the beaker, obtained white precipitate after washing three times with deionized water;

[0040] 3) Dry the white precipitate obtained in step 2) in an oven at 60°C for 12h, and then calcinate it in a muffle furnace at 450°C for 2h to obtain TiO 2 / SiO 2 Precursor;

[0041] 4) with the TiO obtained in step 3) 2 / SiO 2 Take 0.2g of the precursor and disperse it in 50mL, the concentration is 2mol L -1 KOH aqueous solution, after stirring, transfer it to a 100mL reaction kettle, and conduct a hydrothermal reaction at 100°C for 24h;

[0042] 5) Disperse the precipitate collected in step 4) in 200mL with a concentration of 0....

Embodiment 2

[0046] 1) Add 1.8 mL of oleylamine dropwise to a beaker containing 200 mL of ethanol, place the beaker on a magnetic stirring table, and stir for 20 minutes;

[0047] 2) Slowly add 4.5mL tetra-n-butyl titanate to the solution obtained in step 1), and stir for 20min at the same time; after stirring evenly, add 3mL tetraethyl orthosilicate and 0.8mL H 2 0, stirred for 2h, took off the beaker and left it in the dark for 12h, and obtained a white precipitate after washing three times with deionized water;

[0048] 3) Dry the white precipitate obtained in step 2) in an oven at 60°C for 12h, and then calcinate it in a muffle furnace at 450°C for 2h to obtain TiO 2 / SiO 2 Precursor;

[0049] 4) with the TiO obtained in step 3) 2 / SiO 2 Disperse 0.2 g of the precursor in 50 mL of KOH aqueous solution with a concentration of 2 mol L-1, stir evenly, transfer it to a 100 mL reaction kettle, and conduct a hydrothermal reaction at 100 °C for 24 h;

[0050] 5) Disperse the precipitate ...

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 discloses a preparation method of a sea urchin-shaped titanium dioxide multistage microsphere negative electrode material. The preparation method comprises the following steps of: preparing a TiO2 / SiO2 / oleylamine precursor by taking oleylamine as a structure-directing agent, tetraethyl orthosilicate as a SiO2 precursor and tetra-n-butyl titanate as a titanium source through a sol-gel method; secondly, removing SiO2 through alkali etching; and finally, carrying out ion exchange and heat treatment to obtain TiO2 multistage microspheres of a mixed crystal phase (anatase phase / TiO2(B)). The titanium dioxide multistage microsphere negative electrode material with an adjustable structure is prepared through a hydrothermal method-alkali etching-ion exchange method, the crystal form of TiO2 is effectively regulated and controlled so as to promote electrochemical reaction kinetics, the preparation process is controllable, raw materials are non-toxic and harmless, excellent electrochemical performance is shown, and the prepared material is a lithium ion battery negative electrode material with a good application prospect. The material is of great significance to research and application.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, and in particular relates to a preparation method of a sea urchin-like titanium dioxide multi-level microsphere negative electrode material. Background technique [0002] With the continuous consumption of fossil fuels, the continuous growth of population, and serious problems such as environmental pollution are sounding the alarm for human beings and society. Therefore, scientists have extensively studied alternative clean and renewable energy sources. However, such as wind energy, solar energy, and tidal energy Common energy sources have fatal shortcomings: discontinuous, unstable, irreconcilable, and other problems. Therefore, high-performance physical and chemical energy storage systems are required to efficiently store or convert the energy of the above-mentioned energy sources into other forms. Lithium-ion batteries in chemical storage devices have been widely stu...

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): C01G23/053H01M4/48H01M10/0525
CPCC01G23/053H01M4/483H01M10/0525H01M2004/027H01M2004/021C01P2004/32C01P2004/03C01P2006/40Y02E60/10
Inventor 霍京浩孔凡亮任一杰张国强郭守武
Owner SHAANXI UNIV OF SCI & TECH
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