List the types and features of lithium-ion batteries

more and more lithium battery widely used in the market, many products have replaced the lithium battery. Lithium battery contrast ordinary lead-acid battery has the long life, no pollution, energy saving, light weight and other advantages. Then, What is the types of lithium batteries? What the features of respective battery? Let me make up for all the popular science.

Manganese acid lithium

Lithium manganese acid, as a lithium battery materials using a long history, its high safety, especially the resistance to overcharge capability is strong, is a big advantage. Because good stability and manganese acid lithium itself structure in design of batteries, the amount of the anode material don't have to transcend the cathode too much. In this way, the number of active lithium ion makes the whole system is not much, after the cathode with, won't have too much of lithium ion in anode. Even if the overcharge, also won't appear a large number of lithium ion in anode crystallization sedimentary formation. Thus, the ability of resistance to overcharge of manganese acid lithium is * in the commonly used materials.

In addition, the material price is low, and the production process requirement is relatively high, is the earlier the anode materials are widely used.

But it also exists obvious flaws. Spinel lithium manganese acid of high temperature and poor performance. Of the existence of oxygen defective batteries prone to capacity attenuation in high voltage phase, at the same time, under the high temperature cycle use, can also cause a similar capacity attenuation. It's because of the disruptive effects of trivalent manganese ion. Prevent heat attenuation way focused on reducing trivalent manganese this point.

Manganese acid lithium, is limited by the high temperature performance, does not generally used in high power or high ambient temperature situation, such as high speed passenger cars, plug-in electric hybrid, etc are rarely use lithium manganese acid as power. But for electric bus, city logistics vehicles, manganese acid lithium can do.

Lithium iron phosphate

The advantages of lithium iron phosphate is mainly reflected on the cycle life and safety. The main determinants of olivine structure from lithium iron phosphate. This structure, on the one hand, lead to low lithium iron phosphate ion diffusion ability, on the other hand also make it have the good heat stability, and good cycle performance.

The shortcomings of the lithium iron phosphate is obvious, the energy density is low, poor consistency and poor performance at low temperature.

Low energy density is determined the chemical property of the material itself, a lithium iron phosphate macromolecular can only corresponding to accommodate a lithium ion.

Consistency, especially the batch poor stability, in addition to related to the production management level, but also related with its own chemical properties. Lithium iron phosphate is various kinds of lithium battery cathode material is difficult to a kind of preparation. This kind of chemical reaction consistency and uniformity of difficult, poses another problem again at the same time, the lithium iron phosphate material elemental iron and iron impurity always exists in the brought battery failure.

Lithium iron phosphate batteries, due to its high safety, although the energy density affects part of the scope of its use, but is still the current of electric cars in China Power lithium battery Varieties. Especially involving large Numbers of people's life safety bus, national policy enforced using lithium iron phosphate batteries.

The ternary lithium

Ternary lithium anode materials, the comprehensive advantages of LiCoO2, LiNiO2 and LiMnO2 3 materials, synergistic effect is formed within the same batteries only, both the stability of the material structure, activity and lower the cost of the three requirements, are the three main energy density * of a kind of positive electrode materials. Its low temperature effect is obviously better than that of lithium iron phosphate batteries.

Three elements, the higher the content of Ni, the higher the energy density of batteries, at the same time, the lower the safety of the batteries. In practical applications, the proportional relationship of three kinds of materials in batteries, with the passage of time has been changed. People pursuit of energy density is higher and higher, so Ni accounted for more and more is also high.

Ternary material mentioned * weakness is more security, occurred in the process of thermal runaway, its side reaction products contain a large amount of gas, make the risk of accidents and spreading ability is greatly increased. Next, the cycle life of ternary material is also a bottleneck, it is short of lithium iron phosphate levels;*, due to the special microstructure ternary materials, it is not suitable for high pressure operation of compaction, and popular way of improving the energy density processing for it is not applicable.

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