The micro shape of lithium metal undergoes drastic changes during the charge and discharge process, which causes the precipitation of lithium dendrites of lithium metal. Lithium dendrites not only reduce the capacity of the battery, but may also cause short circuits within the battery, causing fire and explosion safety accidents. If a layer of plasticine with a thickness of only about 1 micron is coated on the surface of lithium metal, the lithium metal electrode can be protected almost perfectly. During the normal charge and discharge process, lithium metal is evenly deposited on the surface of the electrode, which acts on the plasticine. Very small. Soft plasticine can well adapt to the shape and volume change of lithium metal, and firmly adhere to the surface of lithium to play the role of a protective coating. Once lithium dendrites "stab out in some areas" ", The plasticine coating will harden rapidly, effectively blocking the growth of lithium dendrites. This text mainly introduces:. ['History of lithium battery development.', 'Influencing factors of lithium battery capacity.', 'Mechanism of plasticine coating to improve lithium battery performance.', 'Harm and inhibition methods of lithium dendrites.']