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Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
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release time:2024-03-11 Hits: Popular:AG11 battery
Although the traditional lithium cobalt oxide material has mature technology, it has low specific capacity and high cobalt price, resulting in high cost of lithium cobalt oxide and limiting the application of lithium cobalt oxide in power batteries. With its advantages in cost and specific capacity, ternary materials are rapidly occupying the market in the field of electric power batteries. For example, NCM materials, with their high capacity and low cost advantages, are equally competitive with lithium iron phosphate materials.
As a low-toxic, high-efficiency secondary power source, lithium-ion batteries have been successfully used in the field of consumer electronics. Especially in recent years, the government has vigorously promoted the development of the electric vehicle industry. Lithium-ion batteries have quickly occupied the electric vehicle field with their advantages in energy density and reliability.
Although the traditional lithium cobalt oxide material has mature technology, it has low specific capacity and high cobalt price, resulting in high cost of lithium cobalt oxide and limiting the application of lithium cobalt oxide in power batteries. The ternary materials developed this year are rapidly occupying the market in the field of electric power batteries by virtue of their advantages in cost and specific capacity. For example, NCM materials, with their high capacity and low cost advantages, have now become evenly matched with lithium iron phosphate materials in the power battery market.
However, ternary materials, such as NCM materials, have poor cycle stability and poor rate performance, which limits their further development and application. In order to improve the performance of ternary materials, scholars have also carried out targeted research. The main reason for the poor stability of ternary materials is the introduction of Ni and Mn. The introduction of Ni element increases the capacity of the material. The higher the Ni content, the higher the capacity of the material. For example, the specific capacity of the high-nickel material NCM811 can reach about 220mAh/g, but the addition of Ni also causes the stability of the material. The main reason is that the valence state of Ni element in the material is unstable, Ni3+ is prone to disproportionation reaction, producing Ni2+, the Ni2+ ion radius is close to the lithium ion radius, and it is easy to enter the lithium layer to cause mixing and occupy the lithium ions. point, preventing lithium ions from entering, causing irreversible capacity loss. Another reason for the poor stability of the material is the Mn element. Mn ions are distorted by the John-Teller effect and enter the electrolyte, causing the structure of the material to be destroyed and causing the capacity of the battery to decay.
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