Introduction of Three-way Materials for Lithium-ion Battery

Lithium-ion battery ternary material is a new type of lithium-ion battery positive electrode material that appears in the development of lithium-ion battery material technology. Due to some comparative advantages, lithium-ion battery ternary material has a wide prospect in the market application.

Lithium-ion batteries are divided into three types of lithium cobalt acid, lithium manganese acid, and ternary materials(except for dynamic lithium iron phosphate) from cathode materials. The so-called lithium ion battery ternary materials are nickel salts, cobalt salts, and manganese salts. raw materials, Battery cathode material made from a mixture of three elements of nickel cobalt manganese(ternary) in different proportions.

The advantages of lithium cobalt acid are obvious, but the price of cobalt metal is high. The advantages of lithium manganese acid are good multiplier performance and low cost. However, the high temperature resistance and cycling performance are not good. The lithium ion battery ternary material is a combination of the two. Advantages, Strive to achieve the best value for money in terms of cost and performance.

The preparation of lithium ion battery ternary materials is divided into two phases. The first stage is the preparation of the three-element material in front of the body, including the synthesis of nickel cobalt manganese ion mixtures, the precipitation reaction of the mixture and the precipitator, and the aging, washing, filtration, and drying.; The second stage is the preparation of lithium ion battery ternary materials, including the mixing of lithium salt and the front body, ball grinding and sintering process.

Depending on the proportion of the three elements when mixed, at present, Commercialized lithium ion battery ternary materials mainly include:(1) LiNi(1/3) Co(1/3) Mn(1/3) Mn,(2) LiNi(0.4) Co(0.2) Mn(0.4) O2(3) ) LiNi(0.5) Co(0.2) Mn(0.3) O2

Among them, the first one is the best performance. In this type of lithium ion battery ternary material, the structure changes less at different temperatures and multipliers, and it has good stability. Due to the replacement of some cobalt materials with nickel manganese, it has comparative cost advantages., However, LiNi(0.4) Co(0.2) Mn(0.4) O2 and LiNi(0.5) Co(0.2) Mn(0.3) O2 are cheaper because of the use of less cobalt, but the disadvantage of the former is that stability has decreased. Afterwards, some nickel also exists in a trivalent form. If it is not controlled well, it is easier to absorb water and also affects the stability of the battery.

In general, the comparative advantages of lithium ion battery ternary materials are obvious: high capacity, long cycle life, good safety performance, and low price. This comes from the synergistic effect of three elements: cobalt can reduce cationic mixed occupancy and stabilize the layered structure; Nickel can increase the capacity of the material; Manganese can reduce costs and improve safety.

As the technology is still under development, the current lithium ion battery ternary material has two disadvantages: First, the platform is relatively low, and the second is the low charging and discharging efficiency for the first time. However, under the strong attraction of comparative advantage, more and more battery manufacturers have begun to become interested in lithium ion battery ternary materials and are preparing or have begun to produce lithium ion battery ternary materials.

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