What are the advantages and disadvantages of ternary lithium batteries?

1. The ternary lithium battery is one of the lithium batteries: it tend to refer to battery cathode material. Usually the cathode material of lithium-ion batteries is cobalt acid lithium.

2. And with nickel cobalt manganese acid lithium anode material of lithium batteries commonly known as the ternary lithium battery, its price is cheaper cobalt acid lithium, pressure slightly higher, the average voltage slightly lower (battery world battery platform), g capacity is slightly higher but lower than, compaction, battery capacity is slightly lower than the same model cobalt acid lithium batteries。

3. The biggest characteristic of the ternary lithium battery is the unit of electrical energy is larger, it is with lithium iron phosphate batteries compared with the results.

4. But a major drawback of the ternary lithium battery is hit to the low point of origin and high temperature. The protection of the ternary lithium battery demanding is in case of accident.

Ternary lithium batteries a relatively balanced in terms of capacity and security, is a comprehensive performance of the battery. The main effect of three kinds of metal elements and advantages as follows:

Co3 + : reduce the cationic hybrid placeholder, stable material layer structure, reduce the impedance value, improve the electrical conductivity, enhance the efficiency of circulation and performance.

Ni2 + : can increase the capacity of the materials (increase the volume energy density of the material), and because of Li and similar radius Ni, Ni too much will also with Li dislocation occur in lithium nickel, mixed lithium layer of nickel ion concentration, the greater the lithium in the layered structure of the embedded harder, deterioration in electrochemical performance.

Mn4 + : not only can reduce the cost of materials, but also can improve the security and stability of the material. But high Mn content will be prone to spinel phase and destroy the layered structure, reduce capacity, cycle 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.

Monomer ternary lithium battery discharge voltage platform is as high as 3.7 V, 3.2 V lithium iron phosphate, and lithium titanate was only 2.3 V, so from the point of view, the energy density of ternary lithium battery has the absolute advantage.

Ternary lithium battery low temperature in winter the temperature of 0 to 5 degrees down, about 90% of summer has declined, but also is not obvious. Farther north, fall will be a little more.

1, High voltage platform: Voltage platform is an important index of the battery energy density, determines the basic performance and the cost of battery, so the material selection of the battery, have important meaning. Voltage platform is higher, the greater the specific capacity, must be the same size, weight, and even the same ampere hour battery, high ternary material lithium battery voltage platform range further. Ternary material voltage platform is significantly higher than that of lithium iron phosphate, line can reach 4.2 v, discharge platform can achieve 3.6 or 3.7 volts.

2, high energy density

3, high tap density

1, poor security

2, high temperature resistance is poor

3, poor life

4, high-power discharge is poor

5, toxic elements (ternary lithium battery power after the charging and discharging temperature rise sharply, release oxygen after high temperature is extremely easy to burn)

1, the LMO no precious metals, the price is relatively low; And sliding trapped in cobalt price is high, high price (high nickel material to BOM cost reduction, but the process cost increase)., high voltage platform LMO, 2 ~ 3.75 ~ 3.8 V, sliding low voltage platform, V3, LMO spinel structure of 3.6 ~ 3.7, the relative better security; Sliding layer structure, easy to lithium nickel are mixed, poor safety (Ni %, the higher the worse) (4), the key of g capacity, low LMO, sliding is higher. Specific reference answer 5 @ fire yao, LMO special high temperature performance is poor, so, industrial usage are LMO doping three yuan. Typical as LMO: sliding = 7:3 (low cost, electric bicycles), 5:5 or3:7, logistics car after 6, plus the LFP, overall cost: pure LMO < LFP LMO mix sliding or less < NCM7 and general characteristics of manganese acid lithium, life is suitable for: 1) cost sensitive;(2) the energy density has certain requirements;(3) the field of security requirement is not high, such as electric bicycles, car at low speed, etc

There are three kinds of manganese acid lithium: 1 layered manganese acid lithium LiMnO2, theoretical capacity of 285 ma · h/g, 4 v voltage platform. Layered structure synthesis, are stable and easy to generate Li2Mn2O4 spinel structure and led to the decrease of the voltage platform, poor stability, the irreversible capacity attenuation, etc.2 high pressure LiMn2O4 spinel manganic acid lithium, theoretical capacity of 148 ma · h/g, 4.15 voltage platform. High temperature performance is poor, 55 ℃ above capacity attenuation. Easy into Li2Mn2O4 spinel structure while also led to the decrease of the voltage platform, poor stability, the irreversible capacity attenuation, etc. Industrial manganese acid lithium is used on this.3 spinel lithium manganese acid Li2Mn2O4, low voltage (v) 3, low capacity, poor circulation, are studying how to avoid this kind of thing. Three yuan: in order to solve the defects of layered manganese acid lithium, by the method of metal elements doping, invented the Ni, Co (Al) instead of manganese ternary material LiNiCoMnO2 (LiNiCoAlO2), both the high voltage, high capacity of nickel acid lithium manganese acid lithium high-pressure high security, good circulation of cobalt acid lithium, and overcome the lithium manganese acid lithium nickel acid synthesis difficult and unstable, the shortcomings of high cost of cobalt acid lithium, become the mainstream of the current positive electrode material. Theoretical capacity of 280 ma · h/g, voltage 2.7 ~ 4.2, now the actual capacity of around 160 ma · h/g. Three yuan in the next few years, the basic will be eliminated after three years, high nickel and NCA for leading role. Estimate the whole three yuan will be eliminated 10 years later, and there will be a new type of battery system to replace the three yuan.

Manganese acid lithium performance is excellent. In public and policy the first three batch of new energy promotion models directory, the energy density of manganese acid lithium battery of pure electric bus supports are more than 115 wh/kg. It changes the previous saying in market that manganese acid lithium has low energy density. The research of SPIR by several manganese acid lithium battery companies such as Duimengguli, Xingheng, Yipeng, etc. found that manganese acid lithium battery SOC cycle can reach 2000 c, which is similar to the ternary system. In policy on the dual requirements of the energy density and fast charging performance, manganese acid lithium battery power performance, discharge ratio of performance and low temperature performance and high voltage frequency are good enough to fully meet the market demand.

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