Lithium-ion batteries currently have two types of liquid lithium-ion batteries (LIB) and polymer lithium-ion batteries (PLB). Among them, the liquid lithium ion battery refers to a secondary battery in which the Li + intercalation compound is a positive electrode or a negative electrode. The positive electrode is a lithium compound-lithium cobaltate or lithium manganate, and the negative electrode is a lithium-carbon intercalation compound. Lithium-ion battery is an ideal energy carrier for the development of the 21st century due to its high working voltage, small size, light weight, high energy, no memory effect, no pollution, low self-discharge and long cycle life.
In 1992, Sony successfully developed lithium-ion batteries. Its practical use has greatly reduced the weight and size of portable electronic devices such as mobile phones and notebook computers. The use time is greatly extended. Since the lithium ion battery does not contain heavy metal cadmium, it greatly reduces environmental pollution compared with the nickel cadmium battery.
The pollution of lithium batteries is still there, but it is relatively small.