• 专利标题:   Anode material of nano-silicon having multilayer-graphene used for lithium ion batteries comprises multilayer-graphene serving as carrier, nano-silicon adsorbed on multilayer-graphene, and silicon suboxide and amorphous carbon layer.
  • 专利号:   US2020194787-A1, US10879530-B2
  • 发明人:   LEE P, WENG B, GEE C, CHEN B
  • 专利权人:   NAT CHUNGSHAN INST SCI TECHNOLOGY, NAT CHUNGSHAN INST SCI TECHNOLOGY
  • 国际专利分类:   H01M004/04, H01M004/38, H01M004/66, H01M004/02
  • 专利详细信息:   US2020194787-A1 18 Jun 2020 H01M-004/38 202055 Pages: 17 English
  • 申请详细信息:   US2020194787-A1 US218486 13 Dec 2018
  • 优先权号:   US218486

▎ 摘  要

NOVELTY - An anode material of nano-silicon having multilayer-graphene as carrier and coated with silicon suboxide and with amorphous carbon layer, comprises multilayer-graphene serving as a carrier; nano-silicon adsorbed on multilayer-graphene, where both multilayer-graphene and nano-silicon serve as a core; silicon suboxide and amorphous carbon layer coated on multilayer-graphene and on nano-silicon; and buffering holes disposed on anode material to provide buffering space. USE - An anode material of nano-silicon having multilayer-graphene used for lithium ion batteries. ADVANTAGE - The anode material has better capacity retention and process cost and is suitable for lithium ion batteries of high energy density. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for fabricating an anode material having multilayer-graphene as carrier and coated with silicon suboxide and with an amorphous carbon layer, which involves (A) providing an etchant and a silicon-containing starting material to obtain a mixture solution after a mixing process, and adding a terminator to mixture solution to make mixture solution become a neutral solution; (B) adding multilayer-graphene to mixture solution for mixing before adding an organic carbon source; (C) subjecting the mixture solution in the step (B) to a calcination process to obtain a core shell material; and (D) subjecting the core shell material to a pulverizing and sieving process to obtain an anode material which has buffering holes and multilayer-graphene as a carrier and is coated with silicon suboxide and with an amorphous carbon layer, before the core shell material is washed with a solvent.