Application of Silicon Materials in Lithium Batteries

The demand for lithium batteries continues to be driven by the three major downstream areas. The performance of anode materials and electrolytes needs to be improved, and silicon materials have entered the category of lithium battery materials. Whether it is the optimization of negative electrode materials or the optimization of electrolyte, silicon materials play a very important role. Silicon materials are widely used, and nano-silicon and organic silicon materials span the lithium battery industry.

High-capacity lithium battery anode material-silicon carbon anode

Most of the currently commercialized anode materials for lithium-ion batteries are graphite. Judging from the gram capacity and compaction density of graphite, it is difficult to improve the energy density of the anode material. In addition, graphite sheets are prone to peeling and have unsatisfactory cycle performance. So far, among several typical anode materials commonly used, silicon is the anode material with a larger theoretical specific capacity. In order to improve the cycle performance of silicon materials and improve the structural stability of the materials during the cycle, the materials are usually nanosized and composited. There are various preparation methods for silicon-carbon anode materials, which provide a foundation for industrialization, but there are still bottlenecks in large-scale promotion.

Additive for high safety electrolyte-organic silicone

The use of additives is one of the most cost-effective and cost-effective ways to improve the performance of lithium-ion battery electrolytes. The research and development of new additives has always been the most active field in lithium-ion battery technology. In recent years, research on organosilicon compounds as electrolyte components has received widespread attention. The application of organic silicon in lithium-ion battery electrolytes mainly involves two aspects: solvents and additives. In the application of solvents, it is mainly used to replace carbonate electrolytes with poor safety performance and high and low temperature resistance; in the application of additives, it is mainly used as SEI film-forming additives, flame retardant additives, water and acid absorption Additives, low temperature high rate additives.

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