• 专利标题:   Preparing carbon-coated silicon nanosheet/nitrogen-doped graphene used in lithium-ion battery comprises mixing silicon nanosheet-graphene precursor with ferrocene, preparing carbon-coated silicon nanosheet/nitrogen-doped graphene, pickling, washing with water-ethanol, and drying.
  • 专利号:   CN115744909-A
  • 发明人:   ZHAO Y, ZHANG Q, MA C
  • 专利权人:   UNIV SHANXI
  • 国际专利分类:   C01B021/082, C01B032/05, C01B032/184, C01B032/194, C01B033/02, H01M010/052, H01M004/36, H01M004/38, H01M004/62
  • 专利详细信息:   CN115744909-A 07 Mar 2023 C01B-033/02 202323 Chinese
  • 申请详细信息:   CN115744909-A CN11480783 23 Nov 2022
  • 优先权号:   CN11480783

▎ 摘  要

NOVELTY - Preparing carbon-coated silicon nanosheet/nitrogen-doped graphene comprises (1) using melamine as a raw material, adopting a thermal polymerization method to prepare graphite phase carbon nitride, (2) using high-purity microcrystalline silicon powder as a raw material, adopting a sand milling method to prepare a silicon nanosheet slurry, (3) adding graphite phase carbon nitride and silicon nanosheet slurry into ethanol solution, obtaining silicon nanosheet-graphene precursor through ultrasonic dispersion, ball mill mixing and stirring and drying, (4) mixing silicon nanosheet-graphene precursor with ferrocene, preparing carbon-coated silicon nanosheet/nitrogen-doped graphene containing impurities through catalytic pyrolysis, and (5) pickling, repeatedly washing with water-ethanol and suction filtration, drying to obtain the final product, which is carbon-coated silicon nanosheets/nitrogen-doped graphene. USE - The method is useful for preparing carbon-coated silicon nanosheet/nitrogen-doped graphene, which is used in lithium-ion battery (claimed). ADVANTAGE - The lithium-ion battery: can exhibit excellent electrochemical performance, and the capacity retention rate can reach 80.99%. The method: is simple, and economical. DETAILED DESCRIPTION - INDEPENDENT CLAIMS ar also included for: a carbon-coated silicon nanosheet/nitrogen-doped graphene; and a lithium-ion battery.