Teach the important factors of lithium-ion battery negative materials

Carbon material negative electrode is a general term, generally can be divided into 5 categories: graphite, hard carbon, soft carbon, carbon nanotubes and graphene. Graphite can be divided into artificial graphite, natural graphite, mesocarbon microspheres. 2. Natural graphite negative electrode The natural graphite negative electrode is processed from natural graphite. The domestic graphite resource reserves and output are abundant, and the mining cost is low. Natural graphite has a relatively complete layout of graphite sheets and a high degree of graphitization, which is suitable for deintercalation and shuttle of lithium ions. The disadvantage is that unmodified natural graphite has poor recurrence. 3. Artificial graphite negative electrode. Artificial graphite negative electrode is processed from carbon material. It is made of easy graphitized soft carbon material through high temperature graphitization treatment above 2500℃. At this time, the secondary particles inside the carbon material are divided by random method. Column, there are a large number of pore layouts, which is conducive to the penetration of electrolyte and the deintercalation and shuttle in the lithium ion anode. Therefore, the artificial graphite anode material can increase and increase the rapid charge and discharge speed and frequency of lithium ion batteries. 4. Soft carbon Soft carbon, processing amorphous carbon that can be graphitized under high temperature conditions (>2500°C). The outstanding benefit of soft carbon material is its high reversible specific capacity, generally greater than 300mAh/g, and good compatibility with organic solvents. Therefore, lithium-ion batteries have good cyclic stability and are more suitable for charging and discharging lithium-ion batteries with high current density. 5. Carbon nanotube Carbon nanotube is an extraordinary carbon material with a relatively complete graphitization layout. It has excellent electrical conductivity and high thermal conductivity. Due to its extraordinary layout, the negative electrode has small depth, short stroke, and fast speed when releasing lithium, and it has less polarization use during high-rate and high-current charge and discharge, which can improve the high-rate fast charge and discharge performance of lithium-ion batteries. Very helpful. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.