• 专利标题:   Producing silicon-graphene-carbon nanotube core-shell composite material, used for secondary battery comprises surface-modifying silicon particles, preparing core-shell powder, dispersing, freeze-drying, pulverizing and calcining.
  • 专利号:   KR2021118320-A, KR2405622-B1
  • 发明人:   PARKSUNGHEE
  • 专利权人:   UNIV WOOSONG
  • 国际专利分类:   C01B032/168, C01B032/198, C01B033/02, H01M010/052, H01M004/04, H01M004/139, H01M004/36, H01M004/38, H01M004/485, H01M004/587, H01M004/62
  • 专利详细信息:   KR2021118320-A 30 Sep 2021 H01M-004/36 202185 Pages: 20
  • 申请详细信息:   KR2021118320-A KR034419 20 Mar 2020
  • 优先权号:   KR034419

▎ 摘  要

NOVELTY - Producing silicon-graphene-carbon nanotube core-shell composite material, comprises (a) surface-modifying the silicon particles with an alkoxysilane-based surface modifier to obtain silicon particles surface-modified with an alkoxysilane-based surface modifier; (b) preparing a silicon-graphene-carbon nanotube core-shell powder coated with silicon particles surface-modified with the alkoxysilane-based surface modifier, graphene and carbon nanotubes on a silicon surface by freeze-drying and pulverizing; (c) obtaining a silicon-graphene-carbon nanotube core-shell composite material powder by ultrasonically dispersing the silicon-graphene-carbon nanotube core-shell powder and lithium titanate in a solvent, followed by freeze-drying and pulverization; and (d) calcining the silicon-graphene-carbon nanotube core-shell composite material powder, cooling it, and mixing it with a fluorine-based polymer to prepare a silicon-graphene-carbon nanotube core-shell composite. USE - The method is useful in producing silicon-graphene-carbon nanotube core-shell composite material for secondary battery (claimed). ADVANTAGE - The method which produce silicon-graphene-carbon nanotube core-shell composite material having higher charge-discharge capacity, high stability including reduction in volume expansion rate, high electrical conductivity; and reduces manufacturing cost of anode agent. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for silicon-graphene-carbon nanotube core-shell composite material produced by the above method. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating a method for producing silicon-graphene-carbon nanotube core-shell composite material (Drawing includes non-English language text).