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At present, lithium iron phosphate batteries and ternary lithium batteries are in fierce competition, and many people will ask: which is better between ternary lithium batteries and lithium iron phosphate batteries? In my personal opinion, for current energy storage batteries, ternary lithium batteries are better because lithium iron phosphate batteries have reached the technological peak, and ternary lithium batteries are still in development. In the future, ternary batteries may also surpass lithium iron phosphate batteries.

Lithium iron phosphate batteries:

It refers to a lithium-ion battery that uses lithium iron phosphate as the positive electrode material. Its characteristic is the absence of precious elements such as cobalt, low raw material prices, and abundant resources of phosphorus and iron on Earth, without any supply issues. Its working voltage is moderate (3.2V), with a large capacity per unit weight (170mAh/g), high discharge power, fast charging capability, and long cycle life. It has high stability in high temperature and high heat environments.

Compared to the commonly used lithium cobalt oxide and lithium manganese oxide batteries on the market, lithium iron phosphate batteries have at least five major advantages: higher safety, longer service life, no heavy metals and rare metals (low raw material cost), support for fast charging, and a wide range of operating temperatures.

The disadvantage of lithium iron phosphate is that it has some performance defects, such as low vibration density and compaction density, which leads to a lower energy density of lithium-ion batteries; The preparation cost of materials is relatively high compared to the manufacturing cost of batteries, resulting in low battery yield and poor consistency; Poor product consistency; Intellectual property issues.

Ternary polymer lithium batteries:

The positive electrode material is a lithium battery made of lithium nickel cobalt manganese oxide (Li (NiCoMn) O2 ternary positive electrode material. According to Ouyang Minggao from Tsinghua University, the "ternary" material referred to in this survey refers to the commonly referred to "ternary power battery" where the positive electrode is ternary and the negative electrode is graphite. In practical research and development applications, there is also a type of ternary material with a positive electrode and a negative electrode made of lithium titanate, commonly referred to as "lithium titanate". Its performance is relatively safe, and its lifespan is relatively long, which is not commonly referred to as a "ternary material"

The advantages of ternary lithium batteries are high energy density and better cycling performance than normal lithium cobalt oxide. At present, with the continuous improvement of formula and structural perfection, the nominal voltage of the battery has reached 3.7V, and its capacity has reached or exceeded the level of lithium cobalt oxide batteries.

The disadvantages of ternary material power lithium batteries mainly include nickel cobalt aluminum oxide lithium batteries, nickel cobalt manganese oxide lithium batteries, etc. Due to the unstable high-temperature structure of nickel cobalt aluminum, high temperature safety is poor, and high pH values can easily cause monomer swelling, which can cause danger. Currently, the cost is relatively high.

Summary: In simple comparison, ternary polymer lithium batteries do have better characteristics than lithium iron phosphate batteries, but why is their development hindered? The development of new energy vehicles is also a key challenge for mobile digital products - the development of batteries. How to ensure that battery technology can meet the growing needs of consumers in a safe manner is not only a requirement for professionals in the automotive technology industry, but also for researchers in all fields.

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