Lithium Battery Anode

Nano Silicon Anode Material Si Powder CAS 7440-21-3

Item No.: Tr- Si Anode
Silicon anode material is becoming the most preferred choice for battery companies and lithium battery material manufacturers to improve anodes due to their abundant reserves and ultra-high theoretical specific capacity.
Particle Size: 30nm; 50nm; 80nm;
Silicon Si powder Properties

What is Nano Silicon Anode Material Si Powder:

Silicon is the most promising electrode material for the next generation of lithium-ion batteries, with a specific capacity (3600 mAh/g) about ten times higher than graphite (372 mAh/g). However, its use is severely limited due to the significant expansion of the material in the loaded (lithified) state (over 300%) and the instability of the solid electrolyte interface layer (SEI). The poor mechanical stability and chemical passivation properties of the silicon electrode make the cyclability of the silicon electrode far from meeting the requirements of the battery system and have inspired many studies and proposals to circumvent these limitations.

During lithium insertion, the volume of silicon changes so much (~400%) that the silicon breaks and falls off the collector, resulting in a prototype lithium-silicon battery losing most of its capacity in less than ten charge-discharge cycles. The key to the success of high-capacity lithium-ion batteries is to solve the problem of the capacity and stability of lithium-ion silicon.

Silicon anode materials show great potential for improving lithium-ion batteries' efficiency and energy storage capacity. Until recently, their main drawback was surface oxidation passivation, which increases impedance and reduces the circularity of the anode. Our high-purity silicon anode materials achieve high specific capacity without significantly affecting cycle life. TRUNNANO is a trusted global Nano Silicon Anode Material Si Powder supplier. Feel free to inquire about the latest price of Silicon Anode Material at any time.


Performance of Nano Silicon Anode Material Si Powder :

Nano silicon anode material (CAS 7440-21-3) has high capacity, high first effect, long cycle, low expansion, excellent processing performance, and rate performance, and it matches well with the existing graphite anode system.


Characteristics of nano silicon powder negative electrode materials

Nanostructure: nano-silicon powder anode materials have nanoscale particle size, generally between 10-50 nanometers. This nanostructure can significantly improve the electrochemical performance and energy density of the material, effectively reduce the internal resistance of the material, and improve the charging and discharging efficiency of the battery.

High energy density: Nano silicon powder anode materials have a huge specific surface area and a high energy density. In lithium-ion batteries, the theoretical specific capacity of nanosilicon powder anode material can reach 4200mAh/g, much higher than the theoretical specific capacity of graphite anode material (372mAh/g).

Good electrochemical performance:

Nano-silicon powder anode material has good electrochemical performance.
Its discharge voltage is high.
It has good cycle stability and multiplicity performance.

During the charging and discharging process, the volume change of nano-silicon powder anode material is small, which can keep the structure stable, thus prolonging the battery's life.

High conductivity: nanosilicon powder anode materials have high conductivity, which enables electrons to be rapidly transmitted in the electrodes, reduces the internal resistance of the battery, and improves the charging and discharging performance of the battery.

Technical Parameter of Nano Silicon Anode Material Si Powder :

How is Nano Silicon Anode Material Si Powder Produced? 

A method for forming a silicon anode material for a rechargeable battery includes a metal matrix providing not more than 30% silicon, including a silicon structure dispersed therein. The metallic matrix is etched at least partially to at least partially isolate the silicon structure.

Particles containing a metallic silicon alloy comprising a metallic matrix and a silicon structure dispersed in the metallic matrix comprising not more than 30wt % of silicon, and by removing the metal from the metal-silicon alloy, the metal matrix of the metal-silicon alloy is etched at least partially to form a porous silicon particle comprising a plurality of interconnected structural elements.


Applications of nano-silicon powder anode materials

Lithium-ion batteries: nanosilicon powder anode materials are widely used in lithium-ion batteries. Compared with traditional graphite anode materials, nano-silicon powder anode materials have higher energy density and better electrochemical performance and thus can provide faster charge/discharge rate and longer battery life. In electric vehicles, mobile devices, and other fields, nano-silicon powder anode materials have a broad application prospect.

Solid State Battery: Solid state battery is a new type of battery technology whose electrolyte is a solid state substance, which has the advantages of high safety, long life, and high energy density. Nano-silicon powder anode materials can be used as anode materials for solid-state batteries to improve the battery's energy density and cycle stability.

Energy storage and conversion: In addition to being used as battery materials, nano silicon powder anode materials can also be used in energy storage and conversion. For example, in supercapacitors, the huge specific surface area of nano silicon powder anode materials can improve capacitors' energy density and charge/discharge speed. In addition, nano-silicon powder can also be used as a catalyst material in energy conversions, such as fuel and solar cells.

Composite materials: Nano-silicon powder anode materials can be compounded with other materials to form composite materials with excellent performance. For example, composites of silicon nanopowder with carbon nanotubes or graphene can further improve the conductivity and energy density of the material.

Other applications: Silicon nanopowder anode materials can also manufacture other products. For example, nano silicon powder can be added as an additive to plastics, rubber, and other polymer materials to improve the hardness and strength of the material. In addition, nano silicon powder can also be used to manufacture coatings, cosmetics, and other products to improve performance and added value.


Storage Condition of Nano Silicon Anode Material Si Powder :

The damp reunion will affect nano Si powder dispersion performance and using effects. Therefore, nano Si should be sealed in vacuum packing and stored in a cool and dry room; the nano Si powder can not be exposed to air. In addition, the Si powder should be avoided under stress.


Packing & Shipping of Nano Silicon Anode Material Si Powder :

We have many different kinds of packing, which depend on the nano silicon anode Si powder quantity.

Nano silicon anode Si powder packing: 1kg/bag or 5kg/bag, 25kg/barrel, or as your request.

Nano silicon anode Si powder shipping: could be shipped out by sea, by air, or by express as soon as possible once payment receipt.

Nano Silicon Anode Material Si Powder supplier

Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials, including boride powder, nitride powder, graphite powder, sulfide powder, 3D printing powder, etc.

If you are looking for high-quality Nano Silicon Anode Material Si Powder, please feel free to contact us and send an inquiry.([email protected])


Silicon Si powder Properties

Other Names Silicon Si powder, Si, Si powder, nano silicon powder
CAS No. 7440-21-3
Compound Formula Si
Molecular Weight 28.08 g/mol
Appearance brown, or silvery
Melting Point 1414°C 
Boiling Point 2900°C 
Density 2330kg/cm3
Purity >99.95%
Electrical Resistivity 3-4 microhm-cm @ 0 °C
Poisson's Ratio 0.064 - 0.28
Specific Heat 0.168 Cal/g/K @ 25 °C
Thermal Conductivity 1.49 W/cm/K @ 298.2 K
Thermal Expansion  (25 °C) 2.6 µm·m-1·K-1
Young's Modulus 51-80 GPa
Exact Mass N/A
Monoisotopic Mass N/A

Silicon Si powder Health & Safety Information

Safety Warning Warning
Hazard Statements H315-H319-H335
Hazard Codes H228
Risk Codes 11
Safety Statements 16-33-36
RTECS Number VW0400000
Transport Information UN 1346 4.1/PG 3
WGK Germany 2
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