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Ternary lithium battery positive electrode material (lithium nickel cobalt manganese oxide): detailed explanation of characteristics and preparation methods


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The positive electrode material of ternary lithium batteries usually uses lithium nickel cobalt manganese oxide (NMC) or lithium nickel cobalt aluminum oxide (NCA). This article will focus on the characteristics and preparation methods of lithium nickel cobalt manganese oxide to gain a deeper understanding of this common positive electrode material.

1. Characteristics of lithium nickel cobalt manganese oxide

High Energy Density : NMC materials have high specific energy and energy density, making them ideal for applications such as electric vehicles that require high energy density.

Excellent cycle stability : NMC materials have good cycle stability and long life, which can ensure that the battery maintains high efficiency after multiple charge and discharge cycles.

Thermal stability : NMC material has good thermal stability and can maintain good performance at high temperatures, reducing the risk of thermal runaway of the battery in high temperature environments.

2. Preparation method of lithium nickel cobalt manganese oxide

Lithium nickel cobalt manganese oxide is usually prepared by solid phase method, hydrothermal method or sol-gel method.

Solid phase method : Mix appropriate amounts of lithium, nickel, cobalt and manganese salts in a certain proportion, and then carry out solid phase reaction at high temperature to generate lithium nickel cobalt manganese oxide.

Hydrothermal method : An appropriate amount of metal salt solution is reacted under high temperature and high pressure hydrothermal conditions to form lithium nickel cobalt manganese oxide nanoparticles, and then the finished product is obtained through filtering, washing and drying.

Sol-gel method : dissolve the metal salt in an appropriate amount of solvent to form a sol, then gel it by adding an appropriate amount of precipitant or complexing agent, and finally calcine at an appropriate temperature to obtain lithium nickel cobalt manganese oxide.

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