Advantages of ternary lithium-ion batteries
Advantages of ternary lithium-ion batteries:
Co3+: Reduce cation mixed occupation, stabilize the layered structure of the material, reduce the impedance value, improve the electrical conductivity, and improve the cycle and efficiency performance.
Ni2+: It can increase the capacity of the material (increase the volume energy density of the material), and due to the similar radius of Li and Ni, too much Ni will also cause the dislocation phenomenon with Li to cause the mixed arrangement of lithium and nickel, and the concentration of nickel ions in the lithium layer The larger it is, the harder it is for lithium to be deintercalated in the layered structure, resulting in poor electrochemical performance.
Mn4+: Not only can reduce the material cost, but also can improve the safety and stability of the material. But too high Mn content will easily appear spinel phase and destroy the layered structure, reduce the capacity and decrease the cycle.
High energy density and good cycle performance are the biggest advantages of ternary lithium-ion batteries, and the voltage platform is an important indicator of battery energy density, which determines the basic performance and cost of the battery. The higher the voltage platform, the greater the specific capacity, so the same volume , weight, and even the same ampere-hour battery, the ternary material lithium-ion battery with a higher voltage platform lasts longer.
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