Sunrise (Guizhou) New Energy Material, a subsidiary of Chinese graphite anode material manufacturer Sunrise New Energy, has been granted a US patent titled Preparation Method of an Anode Material for Lithium-Ion Batteries.
The method improves the initial Coulombic efficiency and power performance of graphite composites for next-generation high-energy and high-power lithium-ion batteries, according to the company.
The company expects the patent to enhance its ability to collaborate with North American partners and expand in the region.
The patent discloses a novel method for preparing graphite-based composites through titanium/nitrogen/fluorine co-doped porous titanium dioxide. The process includes dispersing tetrabutyl titanate in a glycerol solvent, adding hexadecyl trimethyl ammonium bromide, and adjusting the pH with tetramethyl ammonium hydroxide. That is followed by adding ammonium fluoride solution and heating at 150-200° C for 1-6 hours.
The resulting product is centrifuged, washed and vacuum-dried to obtain the doped porous titanium dioxide. This material is then combined with lithium salts and graphite, spray-dried to form porous lithium titanate-coated graphite composites and subsequently carbonized in a tube furnace under argon protection.
Sunrise (Guizhou) New Energy Material has completed the construction of a manufacturing facility with a production capacity of 50,000 tons in Guizhou Province, China.
“The granting of this US patent reaffirms our commitment to advancing core technologies in anode materials, further supporting our strategic vision of ‘leading in the United States, expanding globally,’” said Mr. Haiping Hu, founder and CEO of Sunrise. “We will continue to increase our R&D investments and accelerate the industrial application of our patented innovations.”
Source: Sunrise New Energy
