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Sunrise New Energy Co., Ltd. ("Sunrise," the "Company," "we," or "our") (NASDAQ:EPOW) today announced that its subsidiary, Sunrise (Guizhou) New Energy Materials Co., Ltd., has been granted authorization registration for its invention patent titled "Preparation Method of Anode Material for Energy Storage Lithium-Ion Batteries." This achievement further reinforces Sunrise's global leadership in advanced energy storage battery anode materials.
The resulting anode material demonstrates excellent high-temperature storage performance, high first-cycle efficiency, and outstanding cycling stability, providing significant advantages for energy storage lithium-ion batteries and supporting the development of high-performance, long-life energy storage systems worldwide.
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 μm; performing low-temperature graphitization at 2000–2600°C for 6–24 hours; crushing, classifying, and removing fine powders to obtain a graphite precursor with a particle size distribution of D90/D10 ≤ 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°C for 1–6 hours to form secondary granules, and finally heated to 800–1100°C under an inert atmosphere with a carbon source gas for vapor deposition for 1–6 hours to obtain the finished product.
Posted In: EPOW
