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Which is better, lithium manganate battery or ternary lithium battery? The difference between lithium manganate battery and ternary lithium battery

Lithium manganate battery refers to a battery whose positive electrode uses lithium manganate material. The nominal voltage of lithium manganate battery is 2.5~4.2v. Lithium manganate battery is widely used because of its low cost and good safety. Lithium manganate battery is a cathode material with low cost, good safety and low temperature performance, but the material itself is not very stable, and it is easy to decompose to generate gas, so it is mostly used in combination with other materials to reduce the cost of the cell, but its cycle The lifespan decays rapidly, bulging easily occurs, the high temperature performance is poor, and the lifespan is relatively short. It is mainly used for large and medium-sized batteries. In terms of power batteries, its nominal voltage is 3.7V.

ternary lithium battery

The ternary lithium battery generally refers to the ternary polymer lithium battery, which refers to the lithium battery using the ternary positive electrode material of nickel cobalt lithium manganese oxide (Li(NiCoMn)O2) or nickel cobalt aluminum aluminate as the positive electrode material, and the ternary composite positive electrode material It uses nickel salt, cobalt salt and manganese salt as raw materials. The ratio of nickel, cobalt and manganese in it can be adjusted according to actual needs. The battery with ternary material as the positive electrode has higher safety than lithium cobalt oxide battery, but the voltage is too low. It is used in mobile phones. (The cut-off voltage of the mobile phone is generally around 3.0V), there will be an obvious feeling of insufficient capacity.

Lithium manganate battery and ternary lithium battery are relatively common batteries on the market, and the two batteries have their own advantages. Let's take a look at the difference between lithium manganate battery and ternary lithium battery.

1. Manufacturing cost

Manganese, the main raw material of lithium manganate batteries, is very abundant in my country, so the manufacturing cost is very low, and it has a great cost advantage compared with other types of batteries, while the raw materials of ternary lithium batteries are rare metals, and the global The reserves are relatively limited, so the manufacturing cost is also quite high.

2. Cycle life

Under normal circumstances, the cycle life of lithium manganate batteries can reach 600-800 times, and the cycle life of ternary lithium batteries can reach more than 2000 times.

3. Development prospects

Lithium manganate has the advantages of abundant resources, low cost, no pollution, good safety, and good rate performance, but its poor cycle performance and electrochemical stability greatly limit its industrial development. At present, lithium manganate batteries are mainly Used in electric two-wheeled vehicles, drones, charging treasures, etc.

Due to the advantages of long cycle life and high energy density, ternary lithium batteries are widely used in the field of new energy vehicles. Many new energy vehicles use ternary lithium power battery packs.

4. Security

Lithium manganate battery has almost no gas evolution during storage and charging and discharging, and has strong safety and stability. After being mixed with other materials, it has better high temperature performance.

The thermal stability of ternary lithium batteries is relatively poor. When the temperature reaches 250-300 °C, a strong chemical reaction will occur in the electrolyte inside the battery, resulting in a natural explosion of the battery. The safety is worse than that of lithium manganate batteries.



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