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What are the advantages of lithium nickel cobalt manganese oxide batteries?


What are the advantages of lithium nickel cobalt manganese oxide batteries?

Lithium nickel cobalt manganese oxide is a key ternary cathode material for lithium-ion batteries, with the chemical formula LiNixCoyMn1-x-yO2. Lithium nickel cobalt manganese oxide replaces more than two-thirds of cobalt in lithium cobalt oxide with relatively inexpensive nickel and manganese. The cost advantage is very obvious. Compared with other lithium-ion battery cathode materials, lithium manganate and lithium iron phosphate, Lithium nickel cobalt manganate materials and lithium cobalt oxide are very close in terms of electrochemical performance and processing performance, making nickel cobalt manganese oxide materials become a new battery material and gradually replace lithium cobalt oxide, becoming the darling of a new generation of lithium-ion battery materials.

Advantages of lithium nickel cobalt manganese oxide

1. High energy density, the theoretical capacity reaches 280 mAh/g, and the actual capacity of the product exceeds 150 mAh/g;

2. Good cycle performance, excellent cycle stability at room temperature and high temperature;

3. High voltage platform, stable and reliable cycling in the voltage range of 2.5-4.3/4.4V;

4. Good thermal stability, stable thermal decomposition of the material under 4.4V charging state;

5. Long cycle life, 1C cycle life 500 times, the capacity is maintained above 80%;

6. The outstanding advantages of ideal crystal structure, small self-discharge, and no memory effect.

Method for preparing lithium nickel cobalt manganate

The preparation method of lithium nickel cobalt manganate mainly adopts high temperature solid phase synthesis method and co-precipitation method. Mainly use manganese compounds, nickel compounds and lithium cobalt oxide and lithium hydroxide as raw materials. Through hydrothermal reaction, a precursor with good combination of lithium, manganese, cobalt and nickel is obtained, and then the precursor is supplemented with a lithium source and ground to obtain the precursor The body is calcined to obtain lithium nickel cobalt manganese oxide. With the increasing tension of global resources and the pressure of the environment, battery materials must follow the route of fixed-line circulation.

Application fields of lithium nickel cobalt manganese oxide

Lithium-ion battery cathode material. Such as power batteries, tool batteries, polymer batteries, cylindrical batteries, aluminum shell batteries, etc.

Application prospects: As lithium nickel cobalt manganese oxide is a positive electrode material with higher safety after improvement on the basis of lithium cobalt oxide, since its proposal, it has high capacity, good thermal stability, and wide charge and discharge voltage. Electrochemical performance has received widespread attention and is regarded as an ideal choice for the next generation of lithium-ion battery cathode materials. Lithium nickel cobalt manganese oxide replaces part of Co with Ni and Mn in the layered structure, which reduces the amount of cobalt, reduces the cost, and improves the energy density. It has been widely used in power-type cylindrical lithium-ion batteries.

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