The growing demand for high-capacity, long-life batteries is forcing manufacturers to look for new technologies. Improving the energy density of batteries is one of the objectives targeted in the use of nano silicon.
Lithium ion battery
Research on lithium-ion batteries has led to the use of silicon in the anode. The Li ion storage capacity of silicon is 10 times greater than graphite (4000 mAh/g for Si). But the use of micrometric Si is limited by oxidation and expansion. Silicon nanopowders make it possible to bypass these disadvantages. In addition, Nanomakers has developed and patented the carbon-coated silicon (SiΩC) in order to optimize the performance of Li-ion batteries.
Advantages of carbon coating on nano-Si:
Protect Si from direct contact with electrolyte
Facilitate the stability of the SEI layer
Improve the affinity of nano-Si with graphite and other binders
Standardization of the dispersion of nano-Si in the graphite matrix and increase of the ionic and electronic conductivity thanks to the carbon layer
Advantages of the SiΩC in the anode of the Li-ion battery:
Significant increase in energy capacity using nano-SiOnC composite - Graphite
Significant improvement in efficiency and cycling of batteries