Understand the manufacturing principle of lithium battery in detail

Lithium ion batteries currently include liquid lithium ion batteries (LIB) and polymer lithium ion batteries (PLIB). Among them, liquid lithium-ion battery refers to the secondary battery with li+ embedded compounds as positive and negative electrodes. Lithium compounds LiCoO2, LiNiO2 or LiMn2O4 are used as the positive electrode, and lithium carbon interlayer compound lixc6 is used as the negative electrode. Typical battery systems are:

(-) C | LiPF6—EC+DEC | LiCoO2 (+)
Positive reaction: licoo2=li1-xcoo2+xli++xe------------ (2.1)
Negative electrode reaction: 6c+xli++xe-=lixc6 ----------- (2.2)
Total reaction of battery: licoo2+6c=li1-xcoo2+lixc6 ----------- (2.3)
The principle of polymer lithium-ion battery is the same as that of liquid lithium, and the main difference is that the electrolyte is different from that of liquid lithium. The main structure of the battery includes three elements: positive electrode, negative electrode and electrolyte. The so-called polymer lithium-ion battery means that at least one or more of the three main structures use polymer materials as the main battery system. In the currently developed polymer lithium-ion battery system, polymer materials are mainly used in cathode and electrolyte. The cathode materials include conductive polymer or inorganic compounds used in general lithium-ion batteries. The electrolyte can use solid or colloidal polymer electrolyte, or organic electrolyte. General lithium-ion technology uses liquid or colloidal electrolyte. Therefore, solid secondary packaging is required to contain combustible active ingredients, which increases the weight and limits the flexibility of size. The polymer lithium-ion process has no excess electrolyte, so it is more stable, and is not easy to cause dangerous situations due to overcharge, collision or other damage of the battery, as well as excessive use.

The new generation of polymer lithium-ion batteries can be thin in shape (ATL batteries can be as thin as 0.5mm, which is equivalent to the thickness of a card), arbitrary in area and arbitrary in shape, which greatly improves the flexibility of battery modeling design, so that they can meet the needs of products and make batteries of any shape and capacity, providing application equipment developers with a high degree of design flexibility and adaptability in power solutions, To maximize the performance of its products. At the same time, the unit energy of polymer lithium-ion batteries is 50% higher than that of current general lithium-ion batteries, and its capacity, charge and discharge characteristics, safety, working temperature range, cycle life (more than 500 times) and environmental protection performance are significantly improved compared with lithium-ion batteries.