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

Strontium magnesium silicate nanomaterial and preparation method and application thereof

A technology of strontium magnesium silicate and nanomaterials, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of poor contact between active materials and current collectors, imperfect silicon-based materials, and battery performance decline. Achieve the effects of less investment in equipment, low cost of raw materials, and simple operation

Active Publication Date: 2019-06-28
中镁通达新材料科技(哈尔滨)有限公司
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development of today's silicon-based materials is not perfect, and there are still many problems
The biggest disadvantage is that silicon-based materials usually have a large volume expansion effect during charge and discharge, which will pulverize the negative electrode, cause poor contact between the active material and the current collector, and produce a new SEI film at the same time. On the one hand, the electrolyte membrane is continuously thickened, and on the other hand, some side reactions occur, resulting in a sharp decline in the performance of the battery.

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
  • Strontium magnesium silicate nanomaterial and preparation method and application thereof
  • Strontium magnesium silicate nanomaterial and preparation method and application thereof
  • Strontium magnesium silicate nanomaterial and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 1.0mmol magnesium acetate tetrahydrate ((CH 3 COO) 2 Mg·4H 2 O), 3.0mmol strontium acetate (CH 3 COOSr), 2.0mmol tetraethyl silicate (SiC 8 h 20 o 4 ) and 4.0mmol urea (CO(NH 2 ) 2 ) was dissolved in 20mL ethanol aqueous solution (1:1, V / V), and stirred for 30min. Then the obtained solution was transferred to a reaction kettle and reacted at a constant temperature in an oven at 140° C. for 24 hours. The precipitate was filtered and dried to obtain a white powder. Put the obtained powder in a crucible, calcined in a muffle furnace at 500°C for 4 hours, and at 900°C for 2 hours, and then naturally cooled to room temperature to obtain white strontium magnesium silicate MgSr 3 Si 2 o 8 nanomaterials. will get MgSr 3 Si 2 o 8 Nanomaterials are subjected to powder X-ray diffraction XRD test ( figure 1 ), figure 1 shows that the as-prepared material with MgSr 3 Si 2 o 8 Corresponding to the X-ray diffraction peak spectrum; Scanning electron microscope ...

Embodiment 2

[0019] Weigh 0.5mmol magnesium acetate tetrahydrate ((CH 3 COO) 2 Mg·4H 2 O), 1.5mmol strontium acetate (CH 3 COOSr), 1.0mmol tetraethyl silicate (SiC 8 h 20 o 4 ) and 2.0mmol urea (CO(NH 2 ) 2 ) was dissolved in 15 mL of ethanol in water (1:1, V / V), and stirred for 30 min. Then the obtained solution was transferred to a reaction kettle and reacted at a constant temperature in an oven at 150° C. for 24 hours. The precipitate was filtered and dried to obtain a white powder. Put the obtained powder in a crucible, calcined in a muffle furnace at 500°C for 3 hours, and at 900°C for 3 hours, and then naturally cooled to room temperature to obtain white strontium magnesium silicate MgSr 3 Si 2 o 8 nanomaterials.

Embodiment 3

[0021] Weigh 2.0mmol magnesium acetate tetrahydrate ((CH 3 COO) 2 Mg·4H 2 O), 6.0mmol strontium acetate (CH 3 COOSr), 4.0mmol tetraethyl silicate (SiC 8 h 20 o 4 ) and 8.0mmol (0.480g) urea (CO(NH 2 ) 2 ) was dissolved in 15 mL of ethanol in water (1:1, V / V), and stirred for 30 min. Then the obtained solution was transferred to a reaction kettle and reacted at a constant temperature in an oven at 160° C. for 24 hours. The precipitate was filtered and dried to obtain a white powder. Put the obtained powder in a crucible, calcined in a muffle furnace at 500°C for 3.5 hours, and at 900°C for 2.5 hours, and then naturally cooled to room temperature to obtain white strontium magnesium silicate MgSr 3 Si 2 o 8 nanomaterials.

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
current efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention discloses a strontium magnesium silicate nanomaterial and a preparation method thereof. A certain amount of magnesium acetate tetrahydrate, strontium acetate, tetraethyl silicate and urea are dissolved in a certain volume of aqueous ethanol solution and stirred; then, an obtained solution is transferred into a reaction still for a high-pressure hydrothermal reaction, a precipitate obtained after the reaction is dried, placed in a crucible, calcined in a muffle furnace and then naturally cooled to the room temperature, and the white strontium magnesium silicate nanomaterial is obtained. Electrochemical experiments show that the strontium magnesium silicate nanomaterial prepared by means of the method has a broad application prospect when used as a negative electrode material of lithium ion batteries. In the whole preparation process, the operation is simple, the raw material cost is low, the equipment investment is low, and the nanomaterial is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a strontium magnesium silicate nanometer material and its preparation method and application. Background technique [0002] Silicon is considered to be a new generation of lithium-ion battery anode material that is likely to replace graphite. First, the content of silicon in the earth's crust is 26.3%, second only to oxygen, and its reserves are abundant, so raw materials are cheap and easy to obtain. Secondly, the theoretical lithium storage specific capacity of silicon is 4200mAhg -1 , and the theoretical specific capacity of many silicon-based materials is very high, compared with traditional graphite materials, the specific capacity has been greatly improved. [0003] Silicate compound materials are widely used in the research of lithium-ion battery materials because of their high specific capacity and charge-discharge platform (Wang Mingyue et al., Nanostructur...

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): C01B33/20H01M4/58B82Y30/00
CPCY02E60/10
Inventor 王超李星韩雄黄水平
Owner 中镁通达新材料科技(哈尔滨)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