1results about How to "Good high temperature cycle performance" patented technology

The application discloses a lithium ion battery, which comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, the negative electrode comprises a negative electrode material, the negative electrode material comprises a negative electrode active material and a coating layer, the coating layer comprises an ion-conducting material, and the inorganic component in the coating layer accounts for greater than or equal to 80 wt%; the electrolyte comprises a non-aqueous organic solvent and a lithium salt, the non-aqueous organic solvent comprises a solvent with high dielectric constant and low viscosity and ethylene carbonate, the volume fraction of the solvent with high dielectric constant and low viscosity in the non-aqueous organic solvent is greater than or equal to 10%, and the volume fraction of the ethylene carbonate in the non-aqueous organic solvent is less than or equal to 10%; and the concentration of lithium bisfluorosulfonylimide and / or lithium bis(trifluoromethylsulfonyl)imide in the lithium salt is less than or equal to 0.1 mol / L. By matching the negative electrode material with the specific type of coating layer and the electrolyte with the specific composition, the lithium ion battery has good fast-charging performance, and the risk of explosion and fire during thermal runaway of the battery is reduced.