Advano's silicon solution increases lithium-ion battery capacity tenfold

Posted 2022-12-28 00:00:00 +0000 UTC

Advano, a New Orleans start-up, uses recycled silicon as a raw material, such as silicon in solar panels, and processes it into a carbon matrix containing silicon nanoparticles, foreign media reported. In each particle, under the influence of chemicals, silicon carbide fiber begins to grow, forming something similar to fluff on the surface, and connecting with fluff on other particles to provide mechanical protection. Source: inceptivemind at present, silicon is considered to be the most promising anode material to replace graphite in lithium-ion batteries. If the graphite anode is replaced by the silicon anode, the battery capacity can be increased by about 10 times. However, during the charging process, silicon will expand and destroy the internal structure of the battery. Many companies hope to solve this problem by adjusting the microstructure of silicon wafer or silicon particles. This kind of powder can be used for graphite anode of different concentration. The higher the concentration, the larger the storage capacity. In order to control the silicon expansion, the company also developed a crystal to improve the silicon operating voltage window, so as to improve the cycle performance and charging performance of the battery. To increase battery capacity, manufacturers can add different amounts of silicon nanoparticles to the anode, according to IEEE spectrum. For example, if you want to charge the battery 1000 times without cooling, the silicon content in the negative electrode can be increased to 15%. Sometimes, more than 70% silicon can be added in 250 cycles. At present, advano can produce one ton of silicon nanoparticles per year, which may increase tenfold in the future. The company hopes to reduce the price of particles from $500-10000 per kilogram to $15-150 in the future.

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