LiB anode materials have many types. Carbon material is that people first began to study and apply in LiB production anode material, now is still the focus of everyone’s attention and study.
Nano carbon and silicon have high purity, small particle size distribution, high surface area and other characteristics, melting point as high as1410, boiling point is 235, ionization energy is 8.151 eV, nano silicon with non-toxic, tasteless, high surface activity and other characteristics, is a new generation of optoelectronic semiconductor materials, with wide energy gap semiconductor, also a high-power light source material.
According to metal powder supplier, nanometer silicon powder, ultrafine silicon powder prepared by a special process, high purity, good dispersion, small particle size, distribution, specific surface area, high surface activity, low bulk density, good activity and other characteristics. Nanometer silicon CW-Si-001 can be composited with graphite, carbon nanotube, made of negative electrode material of lithium ion batteries, can be improved capacity and cycle times of lithium ion batteries, extended service life, is a new generation of optoelectronic semiconductor material, with wide gap energy.
Nanometer silicon powder made of silicon nanowires used in rechargeable lithium battery anode materials, or coated graphite in nano-silica surface used for rechargeable lithium batteries anode material, improved the rechargeable lithium battery three times more capacity and charge-discharge cycles. Due to the high absorption rate of nanometer silicon to lithium batteries, the nano silicon for lithium batteries can significantly improve the capacity of lithium batteries (in theory can reach 4000mA/h), while taking advantage of the world's advanced technology, coated graphite in nano-silicon powder, consist of Si-C composite components, can effectively reduce the expansion of silicon absorbing lithium ions, and increase the affinity with the electrolyte, ease of dispersion, improved cycle performance.
Lithium-ion battery with the characteristics of high voltage, high specific energy, no memory effect, no pollution, etc., has become one of the main options of the 21st century green battery. Currently commercially used lithium-ion battery anode material are mainly the carbon-based negative electrode material, but the theoretical capacity of carbon is too small to meet the next generation of new cathode material’s requirements for lithium ion batteries high capacity. Therefore, developing new non-carbon anode materials has great significance to lithium-ion battery development.
For this, the nano-material manufacturers after years of painstaking study had produced 30-50 nm size, 99% nano silicon powder, the powder is used as a negative electrode material of lithium ion batteries, to replace the traditional graphite material. Early tests have proved successful nanometer silicon metal powder has good capacity performance, is 3-5 times of the graphite products now. After putting a lot of production, it is foreseeable needs a lot of nano silicon powder.
LiB anode materials have many types. Carbon material is that people first began to study and apply in LiB production anode material, now is still the focus of everyone’s attention and study. The successful application of carbon anode materials promotes the rapid development of lithium-ion batteries. Currently the negative electrode material used in lithium ion batteries is mainly carbon material, various carbon materials including hard carbon, mesophase carbon microbeads, natural graphite and carbon fibers. According to the structure and reservoir characteristics of lithium, carbon materials can be divided into two categories: graphite materials and non-graphitic carbon materials. Both of them due to the microscopic structure different, its lithium storage mechanism and electrochemical properties have very big difference.
Source:http://www.mhcmp.com
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