Sunrise New Energy has confirmed that its subsidiary, Sunrise (Guizhou) New Energy Materials, has received authorisation registration for its newly granted invention patent: ‘Preparation Method of Anode Material for Energy Storage Lithium-Ion Batteries’.
The patented anode material offers superior high-temperature storage performance, impressive first-cycle efficiency, and excellent cycling stability. These attributes make it highly suitable for energy storage lithium-ion batteries, supporting the development of long-life, high-performance energy storage systems across international markets.
The patent outlines a detailed preparation method for anode materials. It begins with pulverising isotropic petroleum coke to a particle size of D50 = 10–50μm, followed by low-temperature graphitisation at 2,000–2,600°C for 6–24 hours. The material is then crushed, classified, and refined to produce a graphite precursor with a particle size distribution of D90/D10≤4.
A lithium supplementing agent is created by combining metallic lithium and polymers in an organic solvent, which is filtered and vacuum dried. This agent is mixed with the graphite precursor and binder in a ball mill, pre-carbonised at 300–400°C for 1–6 hours, and finally heated to 800–1,100°C under inert conditions with a carbon source gas for vapour deposition.
“This patent reflects our R&D team’s strong innovation capacity and further validates Sunrise’s globally leading position in advanced energy storage anode materials,” said Haiping Hu, founder and CEO of Sunrise New Energy. “We will continue to enhance our R&D investment and accelerate the industrial application of high-efficiency anode materials for the rapidly expanding global energy storage market.”
