What are the primary components of a lithium-ion battery? | Lithium-ion battery components

(1) Positive electrode: Positive electrode materials occupy a major position in lithium batteries. Their performance directly affects the various performance indicators of lithium batteries. One of the key technologies for developing high-energy lithium-ion batteries is the development of positive electrode materials. Active substances mainly refer to lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, lithium nickel oxide, and nickel cobalt manganese oxide. Common lithium-ion batteries are divided into the following three categories.

(2) Diaphragm: A special plastic film that allows lithium ions to pass through but is an insulator for electrons. Currently, there are mainly PE and PP and their combinations. There is also a type of inorganic solid diaphragm, such as alumina diaphragm coating, which is an inorganic solid diaphragm.

(3) Negative electrode: The active material mainly refers to graphite, lithium titanate, or carbon materials with a structure similar to graphite.

(4) Electrolyte: Generally an organic system, such as carbonate solvents dissolved with lithium hexafluorophosphate. Some polymer batteries use gel electrolytes;

(5) Battery shell: Mainly divided into hard shell (steel shell, aluminum shell, nickel-plated iron shell, etc.) and soft pack (aluminum-plastic film).