Silicon carbon anode materials are materials in which silicon materials are doped with carbon materials of different structures, thereby significantly improving the capacity and electrochemical properties of the anode material.
Silicon oxide anode is an inorganic compound, its chemical formula is SiO, and it is dark brown to loess-colored amorphous powder at room temperature and pressure. Silicon oxide anode materials have good cycling performance and are mainly used in the field of power batteries, Tesla is using silicon oxide anodes mixed with artificial graphite.
The graphite anode material of lithium battery is one of the main materials of the lithium-ion battery, which plays a key role in energy density and cycle stability.
Lithium battery anode materials are roughly divided into several types: carbon anode materials, silicon oxide anode, alloy anode materials, tin-based anode materials, lithium-containing transition metal nitride anode materials, nanoscale materials, and nanoscale anode materials.
The lithium battery electrode material has high electronic conductivity, and the carbon material is insoluble in the electrolyte.
|
Property |
Typical Value (for Graphite) |
Typical Value (for Silicon-based) |
|---|---|---|
|
Chemical Formula |
C |
Si or SiOx |
|
Appearance |
Solid powder or flakes |
Solid powder or composite |
|
Purity |
≥99.9% |
≥99.0% |
|
Particle Size |
<20 μm |
Varies, typically <50 μm |
|
Density |
~2.2 g/cm³ |
~2.33 g/cm³ (for pure Si) |
|
Specific Capacity |
~372 mAh/g |
Up to 4200 mAh/g (theoretical) |
|
Electrical Conductivity |
High |
Moderate to high |
|
Thermal Stability |
Good up to ~500°C |
Moderate, degrades at lower temperatures compared to graphite |
|
Cycling Stability |
Excellent |
Challenges with volume expansion |
Lithium battery anode material is used for battery energy storage and release, and is also an important part of the battery. The compatibility between graphite anode and electrolyte is better, and it is also an improvement of battery performance.
The lithium battery electrode material is the carrier of lithium ions and electrons during the charging process of lithium ion batteries, and plays the role of energy storage and release. In the battery cost, the negative electrode material accounts for about 5%-15%, which is one of the important raw materials for lithium-ion batteries.
As one of the future negative electrode materials, silicon carbon composite material has a theoretical gram capacity of about 4200mAh/g, which is more than 10 times higher than the 372mAh/g of graphite negative electrode. After its industrialization, it will greatly increase the battery capacity.
Company Profile
Luoyang Trunnano Tech Co., Ltd supply high purity and super fine lithium battery anode materials, such as silicon anode, silicon carbon anode, silicon oxide anode, graphite anode, etc. Send us an email or click on the needed products to send an inquiry.
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By sea, by air, by express, as customers request.
Storage conditions:
1) Store in a dry environment at room temperature.
2) Avoid damp and high temperature.
3) Use immediately after opening the inner packing bag.
5 FAQs of Lithium Battery Anode Materials
What are the main types of lithium battery anode materials?
The primary types include graphite, silicon-based materials, and lithium titanate. Graphite is widely used due to its stability and good cycle life, while silicon-based materials offer higher theoretical capacities but face challenges with volume expansion during cycling.
Why is silicon considered a promising material for next-generation anodes?
Silicon can theoretically store more lithium ions than graphite, leading to significantly higher energy densities. However, it undergoes large volume changes during charging and discharging, which can cause mechanical stress and degrade the battery's lifespan.
How does particle size affect the performance of anode materials?
Smaller particle sizes generally increase the surface area available for lithium-ion insertion/extraction, improving rate capability. However, very small particles may lead to increased side reactions and reduced tap density, impacting overall battery performance.
What are the challenges in using silicon as an anode material?
Key challenges include significant volume expansion during lithiation, which can lead to electrode pulverization and loss of electrical contact. Strategies like nanostructuring and creating composites with other materials are being explored to mitigate these issues.
How do manufacturers improve the cycling stability of anode materials?
Techniques such as surface coating, nanostructuring, and forming composites with conductive additives or binders can enhance cycling stability. These methods aim to reduce side reactions, accommodate volume changes, and maintain structural integrity over many charge-discharge cycles.
