There are two types of lithium-ion batteries: liquid lithium-ion batteries (LIB) and lithium polymer batteries (PLIB). Among them, liquid lithium-ion batteries refer to secondary batteries with Li+embedded compounds as positive and negative. The positive ji uses lithium compounds LiCoO2, LiNiO2 or LiMn2O4, while the negative ji uses lithium carbon interlayer compound LixC6. The typical battery system is:

　　(-) C | LiPF6-EC+DEC | LiCoO2 (+)

　　Positive reaction: LiCoO2=Li1 xCoO2+xLi++xe-

　　Negative ji reaction: 6C+xLi++xe -=LixC6

　　Total battery reaction: LiCoO2+6C=Li1-xCoO2+LixC6

　　The principle of lithium polymer batteries is the same as that of liquid lithium, with the main difference being that the electrolyte is different from liquid lithium. The main structure of a battery includes three elements: positive ji, negative ji, and electrolyte. The so-called lithium polymer battery refers to the use of polymer materials as the main battery system in at least one or more of these three main constructions. In the developed lithium polymer battery system, polymer materials are mainly applied to positive electrodes and electrolytes. Positive materials include conductive polymer or inorganic compounds commonly used in lithium-ion batteries. Electrolytes can use solid or colloidal polymer electrolytes or organic electrolytes. Generally, lithium-ion technology uses liquid or colloidal electrolytes, requiring sturdy secondary packaging to accommodate combustible active ingredients, which increases weight and limits size flexibility.

　　The new generation of lithium polymer batteries can theoretically achieve diverse shapes, improving the flexibility of battery design. This allows them to meet product requirements and be made into batteries with different shapes and capacities, providing high design flexibility and adaptability for application device developers in power supply solutions to optimize their product performance to the fullest extent. Meanwhile, the unit energy of lithium polymer batteries has increased by 10% compared to conventional lithium-ion batteries. Its capacity and cycle life have been significantly improved compared to lithium-ion batteries.

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