Analysis on the advantages and disadvantages of lithium ion battery and lithium iron phosphate battery

Yesterday, a user asked small editor, three lithium batteries and lithium iron phosphate battery which is good? For energy storage batteries. It is better to have a three-way lithium battery because the lithium iron phosphate battery is at the top of the technology, and the three-way lithium battery is still under development.

lithium iron phosphate battery:

Refers to lithium ion batteries that use lithium iron phosphate as a positive material. Its characteristic is that it does not contain precious elements such as cobalt. The raw materials are low in price and the phosphorus and iron are abundant in the resources of the earth. There will be no supply problems. Its operating voltage is moderate(3.2 V), large capacity per unit weight(170mAh/g), high discharge power, fast charging and long cycle life, and high stability in high temperature and high heat environment.

The advantage is compared with the more common lithium cobalt acid and lithium manganese acid 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 rapid charging, and wide operating temperatures.

Disadvantages Lithium iron phosphate has some performance defects, such as low vibration density and compaction density, resulting in low energy density of lithium ion batteries; The material preparation cost and the battery manufacturing cost are high, the battery yield is low, and the consistency is poor; Poor product consistency; Intellectual property issues.

Three-element polymer lithium battery:

The cathode material uses a lithium battery of a nickel cobalt manganese acid(Li(NiCoMn) O2) ternary cathode material. According to Ouyangming of Tsinghua University, the "three yuan" material referred to in this survey refers to the positive pole is three yuan, and the negative pole is the "three yuan power battery" in the common saying of graphite. In actual R&D applications, there is also a positive pole that is ternary, and the negative pole is lithium titanate, which is often referred to as "lithium titanate". Its performance is relatively safe, its life is relatively long, and it does not belong to the commonly known "ternary material. "

The advantage is that the energy density of the ternary lithium battery is high and the circulation performance is better than normal lithium cobalt acid. At present, with the continuous improvement and structure of the formula, the nominal voltage of the battery has reached 3.7 V, and the capacity has reached or exceeded the level of lithium cobalt acid batteries.

The disadvantages of ternary material-powered lithium batteries are mainly nickel-cobalt aluminate lithium batteries, nickel-cobalt manganese aluminate lithium batteries, etc.. Due to the unstable high temperature structure of nickel-cobalt aluminum, the high temperature safety is poor, and the high pH is easy to make the monomer inflate., which in turn causes danger, the current cost is higher.

Introduction: In contrast, the three-phase polymer lithium battery does have more characteristics than the lithium iron phosphate battery, but why is its development hindered? The development of new energy vehicles is also the key to the development of mobile digital products-the development of batteries. How to ensure that battery technology can meet the growing needs of consumers under the safe conditions is not only the automotive technology related industry personnel, but also the scientific research workers in the entire field.

The page contains the contents of the machine translation.