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

Preparation method of egg shell type silicon dioxide micro-sphere

A technology of silicon dioxide and microspheres, applied in the direction of silicon oxide, electrical components, battery electrodes, etc., can solve the problems of unsuitable lithium-ion battery negative electrode materials, chemical corrosion hazards, environmental pollution, etc., and achieve the benefits of electron transmission and environmental protection. The effect of friendliness and large specific surface area

Inactive Publication Date: 2015-09-02
HENAN NORMAL UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, silicon-based materials with porous structures are generally obtained by using bulk silicon materials as raw materials and chemically etched. Porous silicon-based materials obtained by chemical etching are not suitable for lithium batteries due to their large pore size. It is used in negative electrode materials of ion batteries, and chemical corrosion is generally divided into alkaline corrosion and acidic corrosion. Chemical corrosion may bring danger and pollute the environment

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 egg shell type silicon dioxide micro-sphere
  • Preparation method of egg shell type silicon dioxide micro-sphere
  • Preparation method of egg shell type silicon dioxide micro-sphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) Dissolve 0.3388g of potassium dihydrogen phosphate and 0.3528g of disodium hydrogen phosphate in deionized water, and dilute to 100mL to obtain buffer solution A; (2) Dissolve 47.1618g of ethyl orthosilicate in ethanol, and dilute to volume to 100mL to obtain mixed solution B; (3) add 0.0249g of surfactant cetyltrimethylammonium bromide to buffer solution A, and magnetically stir for about 35min to obtain mixed solution D; (4) add 15mL of the mixed solution B obtained in step (2), stirred magnetically for 15min to obtain mixed solution E; (5) Added 10mL of surfactant glycerol pentaerythritol to mixed solution E and continued magnetic stirring for 30min to obtain mixed solution G; (6) Mixed solution G was put into the reactor and reacted hydrothermally at 105°C for 8 hours, cooled to room temperature, filtered the obtained solution to obtain the precipitate, and washed the obtained precipitate with absolute ethanol, deionized water, deionized water and absolute ethano...

Embodiment 2

[0013] (1) Dissolve 0.3388g of potassium dihydrogen phosphate and 0.3528g of disodium hydrogen phosphate in deionized water, and dilute to 100mL to obtain buffer solution A; (2) Dissolve 47.1618g of silicon tetrachloride in ethanol, and dilute to 100mL to obtain mixed solution B; (3) Add 0.0249g surfactant sodium dodecylbenzene sulfonate to buffer solution A, and magnetically stir for about 35min to obtain mixed solution D; (4) Add 15mL step ( 2) The obtained mixed solution B was magnetically stirred for 15 minutes to obtain mixed solution E; (5) Added 10 mL of surfactant ethylene glycol to mixed solution E and continued magnetic stirring for 30 minutes to obtain mixed solution G; (6) Put mixed solution G into put into a reaction kettle for hydrothermal reaction at 105°C for 8 hours, cool to room temperature, filter the obtained solution to obtain a precipitate, and wash the obtained precipitate with acetone, ultrapure water, ultrapure water and acetone in sequence, and the cle...

Embodiment 3

[0015] (1) Dissolve 0.3388g of potassium dihydrogen phosphate and 0.3528g of disodium hydrogen phosphate in deionized water, and dilute to 100mL to obtain buffer solution A; (2) Dissolve 47.1618g of tetramethylsilane in ethanol, and dilute to 100mL to obtain mixed solution B; (3) Add 0.0249g of surfactant hexamethylenetetramine to buffer solution A, and magnetically stir for about 35min to obtain mixed solution D; (4) Add 15mL to mixed solution D in step (2) The obtained mixed solution B was magnetically stirred for 15 minutes to obtain mixed solution E; (5) Add 10 mL of surfactant sucrose to mixed solution E and continue magnetic stirring for 30 minutes to obtain mixed solution G; (6) Put mixed solution G into the reaction kettle hydrothermal reaction at 105°C for 8 hours, cooled to room temperature, filtered the obtained solution to obtain a precipitate, and washed the obtained precipitate with absolute ethanol, ultrapure water, ultrapure water and absolute ethanol in sequenc...

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of an egg shell type silicon dioxide micro-sphere. The preparation method comprises the following steps of: (1), dissolving soluble sodium salt and soluble potassium salt in water to prepare buffer solution A; (2), dissolving a silicon-based compound in an alcoholic compound to obtain mixed solution B; (3), adding a surface active agent C into the buffer solution A, and uniformly stirring and mixing to obtain mixed solution D; (4), adding the mixed solution B into the mixed solution D, and uniformly stirring and mixing to obtain mixed solution E; (5), adding a surface active agent F into the buffer solution E, and uniformly stirring and mixing to obtain mixed solution G; and (6), carrying out hydrothermal reaction of the mixed solution G at 100-110 DEG C for 6-10h, drying at 60-100 DEG C for 6-10h after filtering and cleaning, and roasting at 400-600 DEG C for 1-5h so as to obtain the egg shell type silicon dioxide micro-sphere. The preparation method disclosed by the invention is simple and moderate in reaction condition; and the prepared egg shell type silicon dioxide micro-sphere has a larger specific surface area and is beneficial to transferring electrons and lithium ions.

Description

technical field [0001] The invention belongs to the technical field of synthesis of inorganic functional material silicon dioxide microspheres, and in particular relates to a preparation method of eggshell type silicon dioxide microspheres. Background technique [0002] Silica has a wide range of uses. It is a raw material for the manufacture of glass, water glass, quartz glass, important components of the electronics industry, ceramics and refractory materials, coatings, spices, catalysts, optical brazing materials, disinfectants, and plastics. It is widely used in construction, chemical industry , electronics and medical fields. In addition, silicon dioxide is an excellent precursor for the preparation of low-oxygen silicon-based oxides or elemental silicon. Due to the high discharge specific capacity of elemental silicon and low-oxygen silicon-based materials, it is a very promising negative electrode material for lithium-ion batteries. At present, with the continuous de...

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): C01B33/113H01M4/485
CPCY02E60/10
Inventor 李苞李凡邱丽梅李永君
Owner HENAN NORMAL UNIV