What are the strengths and weaknesses of the ternary lithium battery

1 ternary lithium battery is a kind of lithium battery: mainly refers to do the battery cathode material, usually lithium battery cathode material is lithium cobalt oxide.

2. The lithium battery with nickel cobalt manganese as positive electrode material is commonly known as ternary material lithium battery, which is cheaper than lithium cobalt acid, slightly higher withstand voltage, slightly lower average voltage (battery boundary called battery platform), slightly higher gram capacity but lower compaction ratio, the same type of battery capacity is slightly lower than lithium cobalt acid battery.

3. The biggest characteristic of ternary lithium battery is the large unit electric energy, which is compared with lithium iron phosphate battery.

4. However, a big disadvantage of ternary lithium battery is that it has a low ignition point when it is subjected to impact and high temperature. So the protection requirements for ternary lithium batteries are very high, in case of accidents.

Ternary lithium battery is a kind of battery with excellent comprehensive performance. The main functions and advantages of the three metal elements are as follows:

Co3+ : reduce cationic mixed space, stabilize the layered structure of the material, reduce the impedance value, improve the conductivity, and improve the circulation and efficiency performance.

Ni2+ : can improve the material capacity (improve the material volume energy density), and due to the similar radius of Li and Ni, excessive Ni will also cause the mixed row of lithium and nickel due to the dislocation phenomenon with Li. The higher the concentration of nickel ion in the lithium layer, the more difficult the delinking of lithium in the layered structure, resulting in the worse electrochemical performance.

Mn4+ : not only can reduce the cost of materials, but also can improve the safety and stability of materials. However, high Mn content will easily lead to spinel phase and damage the layered structure, resulting in lower capacity and cyclic attenuation.

High energy density is the biggest advantage of ternary lithium batteries, the platform is an important indicator of the battery energy density and voltage, determines the basic performance and cost of batteries, the higher the voltage platform, the greater the specific capacity, so the same volume, weight, and even the same ampere hour battery, high voltage platform ternary material lithium battery life is longer.

The discharge voltage platform of a single ternary lithium battery is as high as 3.7v, lithium iron phosphate is 3.2v, and lithium titanate is only 2.3v. Therefore, ternary lithium battery has absolute advantages in terms of energy density.

Ternary lithium battery in the winter low temperature 0-5 degrees below the temperature, is about 90% of the summer, there is a decline, but not too obvious. Farther north, the drop will be a little bit more.

The current domestic new energy car is mainly used in lithium iron phosphate power battery, but the theory of energy density of lithium iron phosphate power battery co., LTD., lithium iron phosphate battery monomer energy density of 120 wh/kg, after the group energy density of 80 wh/kg, so companies are now actively research and development for higher energy density manganese lithium iron phosphate material new power lithium batteries. The energy density of ternary battery is relatively high. The energy density of ternary lithium battery is 180Wh/kg, and 110Wh/kg after grouping, indicating obvious market advantages. Therefore, ternary lithium battery is superior to lithium iron phosphate battery in terms of energy density.

In terms of safety, lithium iron phosphate batteries have advantages over ternary batteries. The reason is that aluminum nickel and cobalt in the ternary material 18650 battery more than 180 ℃ from heating and difficult to control, after a fire and lithium iron phosphate material to 250 ℃ heating phenomenon occurs. In terms of cycle life, lithium iron phosphate battery is similar to ternary battery. The cycle life of single cell is more than 3000 times. After grouping, the service life decreases due to the complex working environment.

In general, the theoretical energy density of lithium iron phosphate battery is limited, and there is no room for improvement. There is still a lot of room for improvement in ternary lithium battery, but the safety of ternary lithium battery is not as high as that of lithium iron phosphate battery, and the cycle life of the two batteries is equal. Because both have their own advantages and disadvantages, their application fields are also different. Power battery enterprises should pay more attention to the safety of batteries, strengthen production monitoring, and strictly ensure the quality, so as to ensure the safety of the use of new energy vehicles and the personal safety of passengers and employees.

1 ternary lithium battery is a kind of lithium battery: mainly refers to do the battery cathode material, usually lithium battery cathode material is lithium cobalt oxide.

2. The lithium battery with lithium nickel-cobalt manganate as positive electrode material is commonly known as ternary material lithium battery, which is cheaper than lithium cobalt acid, slightly higher withstand voltage, slightly lower average voltage (battery boundary called battery platform), slightly higher gram capacity but lower compaction ratio, the same type of battery capacity is slightly lower than lithium cobalt acid battery.

3. The biggest characteristic of ternary lithium battery is the large unit electric energy, which is compared with lithium iron phosphate battery.

4. However, a big disadvantage of ternary lithium battery is that it has a low ignition point when it is subjected to impact and high temperature. So the protection requirements for ternary lithium batteries are very high, in case of accidents.

Ternary lithium battery is a kind of battery with excellent comprehensive performance. The main functions and advantages of the three metal elements are as follows:

Co3+ : reduce cationic mixed space, stabilize the layered structure of the material, reduce the impedance value, improve the conductivity, and improve the circulation and efficiency performance.

Ni2+ : can improve the material capacity (improve the material volume energy density), and due to the similar radius of Li and Ni, excessive Ni will also cause the mixed row of lithium and nickel due to the dislocation phenomenon with Li. The higher the concentration of nickel ion in the lithium layer, the more difficult the delinking of lithium in the layered structure, resulting in the worse electrochemical performance.

Mn4+ : not only can reduce the cost of materials, but also can improve the safety and stability of materials. However, high Mn content will easily lead to spinel phase and damage the layered structure, resulting in lower capacity and cyclic attenuation.

High energy density is the biggest advantage of ternary lithium batteries, the platform is an important indicator of the battery energy density and voltage, determines the basic performance and cost of batteries, the higher the voltage platform, the greater the specific capacity, so the same volume, weight, and even the same ampere hour battery, high voltage platform ternary material lithium battery life is longer.

The discharge voltage platform of a single ternary lithium battery is as high as 3.7v, lithium iron phosphate is 3.2v, and Lithium titanate is only 2.3 V.. Therefore, ternary lithium battery has absolute advantages in terms of energy density.

Ternary lithium battery in the winter low temperature 0-5 degrees below the temperature, is about 90% of the summer, there is a decline, but not too obvious. Farther north, the drop will be a little bit more.

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