Positive electrode (cathode) 

Positive electrode materials are usually lithium oxides, such as lithium cobaltate, lithium manganate, etc. 

They generate voltage by exchanging and releasing with lithium ions. The choice of these materials directly affects the voltage, energy density and cycle life of the battery.  

Negative Electrode (Anode) 

Negative electrode materials are generally made of graphite or carbon with a near graphite structure, and they serve to store lithium ions. 

The performance of the negative electrode material determines the charging and discharging efficiency of the battery.  

Electrolyte

The electrolyte is one of the most important parts of a lithium battery and is usually a mixture of organic solutions and lithium salts. It transfers ions between the positive and negative electrodes, allowing electrons to flow between the positive and negative electrodes to produce electrical energy. 

The selection and formulation of electrolyte has a decisive influence on the performance, life and safety of the battery. An optimized electrolyte formulation can increase the energy density, cycle life and safety of the battery.  

Diaphragm 

Diaphragm is an indispensable part of lithium batteries, usually made of polymer material. Its main function is to prevent short-circuiting between positive and negative electrodes, while allowing free passage of lithium ions in the electrolyte. 

The microporous structure of the diaphragm and the choice of material have a significant impact on the safety and performance of the battery. A high-quality diaphragm ensures efficient ion transfer while preventing internal short circuits and thermal runaway of the battery.  

Collector 

The collector is the part of the lithium battery responsible for collecting and transferring electrons, and is generally made of copper or aluminum. It transports the electrons carried by the positive and negative electrodes to the circuit board, thus outputting electrical energy. 

The design and material selection of the collector has an important impact on the performance and safety of the battery. A good collector design ensures efficient transfer of electrons while reducing resistance and heat loss inside the battery. 

Structural Components 

Structural components such as aluminum/steel shells, cover plates and connecting tabs play a key role in the safety, explosion-proof and sealing performance of the battery. Good matching of structural parts and riveting effect can increase the safety performance of the battery and the convenience of assembling the battery into modules and other practical functions.