Components of lithium-ion batteries

Steel shell/aluminum shell/cylindrical/flexible packaging series:
(1) Positive electrode - The active substance is generally lithium manganese oxide or lithium cobalt oxide, with nickel cobalt lithium manganese oxide materials. Electric bicycles generally use nickel cobalt lithium manganese oxide (commonly known as ternary) or ternary+a small amount of lithium manganese oxide. Pure lithium manganese oxide and lithium iron phosphate gradually fade out due to their large volume, poor performance, or high cost. Conductive collector uses electrolytic aluminum foil with a thickness of 10-20 microns.
(2) Diaphragm - a specially formed polymer film with a microporous structure that allows lithium ions to pass freely, while electrons cannot.
(3) Negative electrode - The active material is graphite or carbon with a similar graphite structure, and the conductive current collector uses electrolytic copper foil with a thickness of 7-15 microns.
(4) Organic electrolyte - carbonate solvent dissolved with lithium hexafluorophosphate, and gel electrolyte used for polymer.
(5) Battery shell - divided into steel shell (rarely used in square shape), aluminum shell, nickel plated iron shell (used in cylindrical batteries), aluminum plastic film (soft packaging), etc., as well as the battery cover and the positive and negative terminal of the battery