Lithium manganate battery

　　The advantage of lithium manganate is that the percentage performance is good, it is easier to prepare, and the cost is low. The disadvantage is that the high temperature and cycle performance of manganese are not good due to the dissolution of manganese. Through doping aluminum and sintering granules, high temperature performance and circulation have been greatly improved, and they can basically meet the actual use. In general, the cost of lithium manganate batteries is strong and low -temperature, low temperature, poor high temperature performance, and slightly attenuation.

　　There are three types of lithium manganate:

　　1. Lumber -like manganate limno2, theoretical capacity 285mA · H/G, voltage platform 4V. The layered structure is difficult to synthesize and is unstable. It is easy to generate the structure of the LI2MN2O4 spinel, which causes the voltage platform to decrease, poor stability, and irreversible attenuation.

　　2. High -voltage spinel lithium lithium limn2O4, the theoretical capacity is 148mA · H/G, and the voltage platform is 4.15. The high temperature performance is poor, and the capacity above 55 ° C is severe attenuation. It is also easy to generate the LI2MN2O4 spinel structure, which causes the voltage platform to decrease, poor stability, and irreversible attenuation. This is currently using lithium manganate in the industry.

　　3. Speed lithium li -lithium li2MN2O4, low voltage (3V), low capacity, poor circulation, are studying how to avoid this kind of thing.

　　Sanyuan: In order to solve the defects of lithium -like lithium manganate, through the method of doping metal elements, the ternary material of Ni and CO (AL) instead of manganese material Linicomno2 (Linicoalo2), which takes into account the high capacity and high voltage of lithium nickel acid The high pressure and high safety of lithium manganate, the good cyclicity of lithium cobaltate, at the same time overcomes the disadvantages of lithium manganate lithium nickel nickel acid synthesis, unstable, and high cost of cobaltate, it has become the current mainstream positive electrode material. The theoretical capacity is 280mA · H/G, the voltage is 2.7 ~ 4.2, and the actual capacity is now around 16mA · H/G.

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