Steel shell/aluminum shell/cylindrical/flexible packaging series:
(1) Positive electrode - the active material is generally lithium manganate or lithium cobalt oxide, nickel cobalt lithium manganate material, and electric bicycles generally use nickel cobalt lithium manganate (commonly known as ternary) or ternary + a small amount of lithium manganate, pure The lithium manganate and lithium iron phosphate are gradually fading out due to their large size, poor performance or high cost. The conductive current collector uses an electrolytic aluminum foil with a thickness of 10-20 microns.
(2) Diaphragm - a specially shaped polymer film with a microporous structure that allows lithium ions to pass freely, but electrons cannot.
(3) Negative electrode - the active material is graphite, or carbon with a similar graphite structure, and the conductive current collector uses an electrolytic copper foil with a thickness of 7-15 microns.
(4) Organic electrolytes - carbonate-based solvents in which lithium hexafluorophosphate is dissolved, and gel electrolytes are used for polymers.
(5) Battery shell - divided into steel shell (square type is rarely used), aluminum shell, nickel-plated iron shell (used for cylindrical batteries), aluminum-plastic film (soft packaging), etc., as well as the cap of the battery, which is also the positive electrode of the battery. Negative terminal
