How much do you know about rechargeable lithium-ion battery?

Lithium-ion battery has advantages of high working voltage, high specific energy, wide working temperature range, stable discharge, that is a focus in the study of chemical power source in recent years. The research about lithium-ion battery began in the late 1950s, its development has experienced 3 periods of lithium batteries, rechargeable lithium battery, and lithium-ion rechargeable battery.

A lithium battery usually directly with metallic lithium as negative, according to the type of electrolyte and cathode materials, can be divided into soluble cathode battery (such as Li/SO2, Li/SCC12 and Li/S02C12, etc.), solid cathode battery (such as Li/Mn02, Li/(CF).And LifCuO, etc.), solid electrolyte battery (such as Li/LiI/I2 (P2VP)) and molten salt electrolyte battery (LiA1 / LiC1 - KC1 / FeS2) four categories.

Since the 20th century, the portable electronic device is designed to be smaller and smaller, lighter, smaller and longer duration of use rechargeable battery demand also will increase. Although tin nickel batteries to meet the requirements of this aspect has made a lot of work, but it's in the aspect of energy performance has reached the limit, and it had a great influence on the environment. So, you need to develop a novel electrochemical battery. Since the eighty s, with lithium metal anode, adopting without water electrolysis liquid battery has successfully intervene in the market. Compared with ordinary using aqueous electrolyte of dry cells, they have the obvious characteristics: 1) high voltage;2) the ratio of energy (including the volume and weight than energy);3) low self-discharge rate,4) wide temperature range. Therefore, as candidates of high energy battery, Lithium electricity Pool has attracted more and more attention.

Represented by Li/Mn02 various models of lithium battery widely to enter the market at a time, marks a lithium electricity for lithium salt, organic solvents. Soon, in the mid - 80 - s development system is various, gradually to Li/MoS2, Li/Mn revenge and LiV205 primarily. However, charging and discharging lithium metal and the electrolyte produces chemical reaction, make the utilization rate of only 25% 0 metallic lithium battery characteristics of high energy density is greatly weakened.

In order to develop the secondary lithium battery people, do a lot of work. However, in the process of development of secondary lithium battery met many practical problems, they include: 1) cycle performance is poor, 2) charging time long;3) safety performance is low. Almost all of these problems are because of the formation in the process of charging lithium dendrite. In order to solve the disadvantage of lithium metal anode, some can store began to be studied as anode material of lithium materials, including aluminum, wood's metal and graphite etc. Electrochemical workers seeking to intercalated-li carbon as cathode material of lithium

Rechargeable lithium-ion battery has been developed rapidly in recent years. SONY began to develop lithium-ion battery using metal lithium as anode material in 1985. In 1986 they started to develop carbon as anode of lithium-ion battery. They successfully developed a rechargeable battery using carbon as anode, and pushed into the market for the first time in 1990.

Research on raw material of rechargeable lithium-ion battery, their characteristics, process technology and the performance of battery, please pay attention to the next posts from Chineng electronic technology co., LTD.;

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