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Two preparation methods of nano silicon oxide SiO2 as anode material of lithium battery

2021-11-25 10:26:05  News

The preparation methods of nano-SiO2 are divided into two types: physical method and chemical method:

(1) Physical Law

The physical method generally refers to the mechanical crushing method. Use a super jet mill or a high-energy ball mill to pulverize the SiO2 aggregates to obtain ultra-fine products with a particle size of 1 to 5 microns. The process is simple but easy to introduce impurities. The characteristics of the powder are difficult to control, the preparation efficiency is low, and the particle size distribution is wide.

(2) Chemical method

The chemical method can produce pure ultrafine SiO2 particles with uniform particle size distribution. Chemical methods include chemical vapor deposition (CVD) method, liquid phase method, ion exchange method, precipitation method and sol-gel (Sol-Gel) method, etc. The main production method is gas phase method using silicon tetrachloride as raw material. The precipitation method using sodium silicate and inorganic acid as raw materials and the sol-gel method using silicate, etc. as raw materials.

Overview of nano silicon oxide SiO2 as anode material for lithium battery

Nano-silica is an inorganic chemical material, commonly known as white carbon black. Because it is ultra-fine nanometer with a size range of 1~100nm, it has many unique properties, such as anti-ultraviolet optical properties, and can improve the anti-aging, strength and chemical resistance of other materials. The use is very wide. Nano-scale silica is an amorphous white powder, non-toxic, odorless, and non-polluting. Its microstructure is spherical, showing a flocculent and net-like quasi-particle structure. The molecular formula and structural formula are SiO2, and it is insoluble in water.

Two preparation methods of nano silicon oxide SiO2 as anode material of lithium battery

Nano is a scale of 10-9 meters. Nano materials refer to at least one dimension in the range of nanometers in three-dimensional space, that is, the range of 1-100 nanometers. Nanomaterials have small size effects, surface effects and macroscopic quantum tunneling effects, so they exhibit many unique properties, and have broad application prospects in catalysis, light filtering, light absorption, medicine, magnetic media and new materials.

Application of Nano Silicon Oxide SiO2 as Anode Material for Lithium Batteries

Nano-silica has a wide range of uses. Generally, the added weight is 0.5-2%, and individual product systems can reach more than 10%. The key to product performance is: fully dispersed into the system. When using, according to different systems, pre-disperse nano-silica in water, acetone, alcohol or other solvents. For oily systems, auxiliary agents can be used for pretreatment. Mainly used in the following areas,

(1) Electronic packaging materials

Fully disperse the surface-actively treated nano-silica in the silicone modified epoxy resin encapsulant matrix, which can greatly shorten the curing time of the packaging material (2.0-2.5h), and the curing temperature can be reduced to room temperature , The sealing performance of the device is significantly improved, and the service life of the device is increased.

(2) Resin composite materials

Fully and uniformly dispersing nano-silica particles into the resin material can comprehensively improve the performance of the resin-based material. Including: A to improve strength and elongation; B to improve wear resistance and improve the surface finish of the material; C anti-aging performance.

(3) Plastic

The use of nano-silica for light transmission and small particle size can make the plastic more dense. After adding silica to the polystyrene plastic film, it can improve its transparency, strength, toughness, waterproof performance and anti-aging performance. Use nano-silica to modify ordinary plastic polypropylene, so that its main technical indicators (water absorption, insulation resistance, compression residual deformation, flexural strength, etc.) all meet or exceed the performance indicators of engineering plastic nylon 6.

(4) Paint

It can improve the coating's poor suspension stability, poor thixotropy, poor weather resistance, poor scrubbing resistance, etc., so that the bonding strength of the coating film and the wall is greatly improved, the hardness of the coating film is increased, and the surface self-cleaning ability is also improved.

(5) Rubber

Silica is known as white carbon black. After adding a small amount of nano-SiO2 to ordinary rubber, the strength, wear resistance and aging resistance of the product reach or exceed high-end rubber products, and the color can remain unchanged for a long time. Nano-modified color EPDM waterproofing membrane, its abrasion resistance, tensile strength, flexural resistance, and aging resistance are all improved significantly, and the color is bright and the color retention effect is excellent.

(6) Yan (dye) material

The surface modification of the organic pigment (dye) by adding nano-Si02 not only greatly improves the anti-aging performance of the pigment (dye), but also increases the brightness, hue and saturation to a certain extent, greatly expanding The grade and application range of organic pigments (dye) materials have been improved.

(7) Ceramics

Using nano-SiO2 instead of nano-A1203 can not only play the role of nano-particles, but also the second-phase particles, which can improve the strength, toughness, hardness and elastic modulus of ceramic materials.

The use of nano-SiO2 to composite the ceramic substrate improves the compactness, toughness and smoothness of the substrate, and greatly reduces the sintering temperature.

(8) Sealant, adhesive

The addition of nano SiO2 coats a layer of organic material on its surface to form a network structure and form a silica structure, which makes it hydrophobic, which can inhibit colloidal flow, speed up the curing speed, improve the bonding effect, and increase the sealing of the product. And impermeability.

(9) FRP products

Nano particles and organic polymers produce grafting and bonding, which increase the toughness of the material, increase the tensile strength and impact strength, and greatly improve the heat resistance.

(10) Drug carrier

The use of nano-SiO2 as a carrier can achieve a good slow-release effect.

(11) Cosmetics

Nano-Si02 is an inorganic component, easy to be compatible with other components of cosmetics, non-toxic, odorless, self-white, strong UV reflection ability, good stability, does not decompose after being irradiated by ultraviolet rays, does not change color, and will not be combined with other components in the formula. The separation of chemical reactions has laid a good foundation for the upgrading of sunscreen cosmetics.

(12) Antibacterial materials

Utilizing the huge specific surface area, surface multi-mesoporous structure, super adsorption capacity and unique physical and chemical properties of nano-SiO2, functional ions such as silver ions are uniformly designed into the mesopores on the surface of nano-SiOX to develop high-efficiency, long-lasting, and durable The high-temperature, broad-spectrum antibacterial nano-antibacterial powder can be widely used in bills, medical and health, chemical building materials, household appliances, functional fibers, plastic products and other industries.

The price of nano silicon oxide SiO2 as anode material for lithium battery

The price of lithium battery anode material nano silicon oxide SiO2 will be related to the production cost, transportation cost, international situation, exchange rate and changes in the supply and demand of the lithium battery anode material nano silicon oxide SiO2 market. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for nano silicon oxide SiO2 as anode material for lithium batteries, please feel free to send an inquiry to get the latest price of nano silicon oxide SiO2 as anode material for lithium batteries.

Supplier of nano silicon oxide SiO2 anode material for lithium battery

As a global supplier of nano-silicon oxide SiO2, a negative electrode material for lithium batteries, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.

Silicon Oxide SiO2 Hollow Nanospheres Properties
Other NamesQuartz, silane, dioxo, Silicon (IV) Oxide, Cristobalite,
Silica, Crystalline silica, Dioxosilane
CAS No.60676-86-0
Compound FormulaSiO2
Molecular Weight60.09
AppearanceWhite Powder
Melting Point1600
Boiling Point2230
Density2.533 g/cm3
Solubility in H2ON/A
Exact Mass59.9668 g/mol
Silicon Oxide SiO2 Hollow Nanospheres Health & Safety Information
Signal WordWarning
Hazard StatementsH319-H335-H373
Hazard CodesN/A
Risk CodesN/A
Safety StatementsN/A
Transport InformationN/A

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