One disadvantage of commercial graphite is the limited capacity (theoretical capacity of 372 mAh/g) prior to LiC6 formation. A lithium battery with a metal oxide
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Figure 1 shows the charge and discharge curves of graphitic carbon materials under constant charge. Among them, charging is lithium ion insertion, and discharging is

①The electrochemical reaction of graphiteDuring the charging process, the carbon material participates in the reduction reaction, and lithium ions are inserted into it to form

When the charging voltage is higher than 4.3V, the reversible capacity of LiMO2 (M=Co, Ni, Mn) layered oxide will decrease significantly. This is caused by

Olivine type compound: LiFePO4 /LiMPO4(M=Mn, Co, Ni),Vanadium compounds Olivine type compound ① LiFePO4Iron is a rich metal, which is cheaper and more environmentally friendly than

Spinel compound: LiMn2O4 / LiMxMn2-xO4 (M=transition metal) 1.LiMn2O4In the cubic spinel structure LiM2O4 (M=Ti, V, Mn), oxygen is closely packed according to the cubic ABCABC

1.LiCoO2LiCoO2 has an R3m rhombic hexahedron structure. Although it is expensive, it is suitable for large-scale production and is therefore widely used as a cathode

Layered compoundThe layered structure of lithium transition metal oxide LiMO2 has strong ionic characteristics and the most densely packed crystal structure. Oxygen ion has the