Why do lithium-ion batteries ignite spontaneously?

Lithium ion is the most vivid metal in the world. Lithium-ion batteries are small in size and high in capacity and density, and their high energy density makes them the first choice for electric cars. Lithium-ion batteries use lithium gains and losses of electrons and relocation collection to complete the storage of electrical energy during operation. When the battery is charged, the lithium ion atoms in the positive electrode will lose electrons and become lithium, resulting in a potential difference. Under the effect of the potential difference, the lithium in the electrolytic medium migrates and gathers to the negative electrode. When discharging, the whole procedure is reversed. The entire operation process is jointly completed by the gains and losses of the lithium ion metal in the electrode and the relocation of electrons and lithium in the electrolyte. However, the chemical properties of lithium ion are too vivid. Lithium ion metal exposed to the air will have a violent oxidation reaction with oxygen, and then burn and explode. Therefore, in the actual application of lithium-ion batteries, scientists try every means to prevent the conversion of lithium in the electrolyte to lithium-ion metal, and lock the metal lithium ions in graphite or lithium-ion compounds. People often hear that lithium iron phosphate Ion, lithium cobaltate ions are the materials for storing lithium ion atoms. At the same time, in order to prevent air from entering the battery, a series of protection methods have been adopted. This prevents lithium ion metal from exploding when it touches oxygen. In use, the spontaneous combustion of lithium-ion batteries is caused by improper protection methods or severe external force damage, resulting in failure of the protection and the contact between metal lithium ions and air. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: How is the lithium security feature implemented? What is the capacity of the battery?