Brief analysis of the function and research of lithium ion battery

　　Lithium-ion batteries are currently divided into 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 and a negative electrode.

　　"The role and research of lithium ion batteries" "Lithium ion batteries are currently divided into 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 Li+ intercalation compounds are positive and negative electrodes. The positive electrode adopts lithium compound LiCoO2 or LiMn2O4, and the negative electrode adopts lithium-carbon intercalation compound. Lithium-ion batteries are an ideal energy source for development in the 21st century due to their 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 practicality has greatly reduced the weight and volume of portable electronic devices such as mobile phones and notebook computers. The use time is greatly extended. Since lithium-ion batteries do not contain heavy metal chromium, compared with nickel-chromium batteries, it greatly reduces environmental pollution.　　In order to develop more excellent varieties, people have conducted research on various materials. So as to create an unprecedented product. For example, lithium sulfur dioxide batteries and lithium thionyl chloride batteries are very characteristic. Their positive active material is also a solvent for the electrolyte. This structure only appears in non-aqueous electrochemical systems. Therefore, the research on lithium batteries has also promoted the development of electrochemical theory of non-aqueous systems. In addition to using various non-aqueous solvents, people have also conducted research on polymer thin film batteries.