What are the benefits of lithium ternary batteries

Global energy shortages, environmental pollution, and climate change are increasingly plaguing human society. "Seeking green alternative energy to achieve sustainable development" has become a common task facing all countries in the world.

Due to the development of electric vehicles and large-scale energy storage, batteries in the future will inevitably develop in the direction of high energy, high safety and long life. In order to improve the performance of batteries, people have begun to study the positive electrode materials of batteries. At a recent meeting of experts on the "Apple battery supply chain" and "polymer batteries", experts concluded that ternary materials are expected to become the mainstream of batteries in the future because of their good performance.

At present, the commonly used lithium battery positive electrode materials are: lithium cobalt acid, lithium manganese acid, lithium iron phosphate and three materials. Lithium cobalt acid is also currently occupying *'s market share due to its early development and low price. However, because of its poor safety performance, its market share has also continued to decline in recent years. Lithium manganate is not suitable for use as a vehicle power battery due to poor high temperature performance. Although lithium iron phosphate is considered to be the current * vehicle battery positive material, due to its low energy density, it also causes the problem of insufficient mileage of electric vehicles.

Experts believe that compared with other positive materials, ternary materials have the advantages of better product consistency, better recycling performance, higher energy density, and higher cost performance. The future market of batteries must belong to ternary materials. In fact, ternary materials have been more and more favored by manufacturers in recent years. From 2007 to 2011, the output of ternary materials has maintained a rapid growth for five consecutive years, and last year's total national production reached 8,500 tons. At present, Chery Automobile has begun to study the use of ternary materials to produce automotive batteries. In addition, dozens of battery manufacturers have stated that they plan to increase the use of ternary materials.

It is reported that in a variety of battery positive materials, only ternary materials can achieve a energy density of 180 wh/kg. Moreover, some manufacturers use ceramic coatings on PE membranes to improve the heat resistance of the diaphragm and also improve the safety of nickel-cobalt manganese lithium ternary materials. At present, the main obstacle to the wide application of ternary materials is high cost. It is reported that the first-line brand of lithium iron phosphate material is 130,000 tons, while the ternary material is 150,000. However, the price of ternary materials has also been declining year by year in recent years. In addition, if it is produced on a larger scale, the cost will also be reduced by a greater extent.

Three-element polymer lithium battery refers to a lithium battery of a positive electrode material using lithium nickel-cobalt manganese acid(Li(NiCoMn) O2) three-element positive material, and a three-element composite positive material precursor product. Nickel salt, cobalt salt, manganese salt are used as raw materials., The ratio of nickel cobalt manganese inside can be adjusted according to actual needs. The three-element material positive electrode battery has high safety relative to the lithium cobalt acid battery, but the voltage is too low and used on mobile phones(the mobile phone cut-off voltage is generally about 3.4 V). There will be a significant lack of capacity.

Lithium ternary battery performance:

Materials that are more balanced in terms of capacity and safety, have better recycling performance than normal lithium cobalt acid. Due to technical reasons, the nominal voltage in the early stages was only 3.5-3 .6 V, which was limited in the range of use. However, until now, with the continuous improvement of the formula and The structure is perfect, The nominal voltage of the battery has reached 3.7 V, and the capacity has reached or exceeded the level of lithium cobalt oxide batteries.

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