Sunrise New Energy granted patent for lithium-ion battery anode material

Sunrise New Energy (EPOW) has been granted authorization registration for its invention patent titled “Preparation Method of Anode Material for Energy Storage Lithium-Ion Batteries.” The invention discloses a method for preparing anode materials used in energy storage lithium-ion batteries. The process includes pulverizing isotropic petroleum coke to a particle size of D50: 10-50 mum; performing low-temperature graphitization at 2000-2600 degrees C for 6-24 hours; crushing, classifying, and removing fine powders to obtain a graphite precursor with a particle size distribution of D90/D10 less than or equal to 4. Metallic lithium and polymers are then added to an organic solvent, filtered, and vacuum dried to obtain a lithium supplementing agent. The graphite precursor, lithium supplementing agent, and binder are uniformly mixed in a ball mill, pre-carbonized at 300-400 degrees C for 1-6 hours to form secondary granules, and finally heated to 800-1100 degrees C under an inert atmosphere with a carbon source gas for vapor deposition for 1-6 hours to obtain the finished product.