Lithium silicide (LiSi₂) is a compound composed of lithium and silicon, with the formula LiSi₂. It is a type of silicide where two silicon atoms are bonded with lithium.
Formula: LiSi₂.
Appearance: It is typically found in a gray or metallic form, often as a powder or a solid compound depending on the synthesis method.
Density: As with other silicides, lithium disilicide has a relatively low density, making it potentially useful in lightweight applications such as lithium-ion batteries.
Electrical Conductivity: LiSi₂, like many silicides, can exhibit semiconductor behavior, with moderate conductivity compared to materials like graphite or pure lithium.
Anode Material: Lithium silicide has been explored as a potential anode material for lithium-ion batteries. Silicon-based materials, including lithium disilicide, are attractive for their high theoretical capacity (compared to graphite) but face challenges related to volume expansion and cycling stability.
Capacity: Lithium silicide can accommodate a large number of lithium ions, contributing to a high theoretical capacity. However, the capacity retention and efficiency during repeated charge-discharge cycles are subject to volume expansion and material degradation.
Cycling Stability: One of the major issues with silicon-based materials is the volume expansion during lithiation (charging) and delithiation (discharging), which can cause cracking and loss of electrical contact in the electrode. Lithium disilicide may have advantages in this area, offering better stability than pure silicon, but it still faces challenges in long-term cycling stability.
Energy Density: Lithium silicide offers the potential for higher energy densities compared to graphite anodes, making it an attractive option for applications that require high-capacity batteries.
Lithium-Ion Batteries: Lithium silicide is primarily researched for use as an anode material in lithium-ion batteries, especially for high-capacity, high-energy applications like electric vehicles, portable electronics, and grid storage systems.
Silicon-Based Anodes: Lithium silicide is part of the broader trend of developing silicon-based anodes for lithium-ion batteries. Silicon is a promising alternative to graphite due to its higher theoretical capacity, and lithium disilicide may play a role in improving the performance of these materials.
VI HALBLEITERMATERIAL GmbH (VIMATERIAL) employs a stringent quality assurance system to ensure the reliability of our product quality. Strict quality control is implemented throughout the entire production chain, and for defective products, we strictly enforce the principle of rework and redo. Each batch is released only after passing detailed specification tests.
Every batch of our materials is independently tested, and, if necessary, we send samples to certified companies for testing. We provide these documents and analysis certificates with the shipment to certify that our products meet the required standards.
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