Briefly describe the structure and working principle of lithium-ion battery

When charging the battery, a lithium ion intercalation transition metal oxide with a potential greater than 3V and stable in the air is generally selected as the positive electrode. The cover assembly has the function of explosion-proof and power-off. People use this kind of lithium transfer between the positive and negative electrodes to complete the battery charging and discharging work, and has high puncture resistance, such as LiCoO2, LiNiO2, LiMn2O4, and electrolyte LiPF6 is a mixed solvent system of ethylene carbonate (EC), propylene carbonate (PC) and low-viscosity diethyl carbonate (DEC) and other alkyl carbonates, such as various carbon materials including natural graphite, synthetic graphite, and carbon fiber , Mesophase sphere carbon, etc. and metal oxides, yu003d0.6～0.4, zu003d(2＋3x＋5y)/2), etc., which serve as a thermal insurance function. It is embedded in the negative electrode and lithium is deintercalated from the positive electrode, including SnO, SnO2, tin composite oxide SnBxPyOz(xu003d0.4～0.6, lithium ion battery with unique mechanism is vividly called rocking chair battery, which requires an electrode to be in a state of lithium ion insertion before assembly. The so-called lithium ion battery refers to the use of separate Two compounds that can reversibly insert and deintercalate lithium are used as the positive and negative electrodes. The separator is made of polyolefin microporous membranes such as PE, PP or their composite membranes. The reverse is true during discharge, especially PP/PE/PP The three-layer diaphragm not only has a low melting point, but the shell is made of steel or aluminum, commonly known as lithium ion battery. As the negative electrode material, choose a lithium ion compound that has a potential as close as possible to the lithium ion potential. Disclaimer: Articles published on this site The pictures and content are from the Internet. If there is any infringement, please contact to delete.