• 专利标题:   Preparing silicon-carbon cathode composite material useful for lithium-ion battery, comprises, e.g. emulsifying graphene oxide, adding silicon powder for homogenization, drying and roasting.
  • 专利号:   CN111403723-A
  • 发明人:   WU Y, ZHANG J, SUN D, CHEN Y, TAN Z, QUAN Y
  • 专利权人:   BEIJING GRAPHENE INST CO LTD
  • 国际专利分类:   C01B032/182, H01M010/0525, H01M004/36, H01M004/38, H01M004/583, H01M004/62
  • 专利详细信息:   CN111403723-A 10 Jul 2020 H01M-004/36 202060 Pages: 9 Chinese
  • 申请详细信息:   CN111403723-A CN10311216 20 Apr 2020
  • 优先权号:   CN10311216

▎ 摘  要

NOVELTY - Preparing silicon-carbon cathode composite material comprises emulsifying 0.1-1 wt.% graphene oxide to form uniformly dispersed suspension of graphene oxide, adding silicon powder into the suspension for homogenization to obtain graphene oxide-silicon powder mixed liquid, drying the graphene oxide-silicon powder mixed liquid to obtain graphene oxide-silicon powder composite material and roasting the graphene oxide-silicon powder composite material at 600-1200 degrees C for 1-5 hours under inert gas atmosphere or reducing atmosphere. USE - The silicon-carbon cathode composite material is useful for lithium-ion battery (claimed). ADVANTAGE - The composite material: maintains fewer graphene sheets after reduction; has controllable sheet diameter and better conductivity than the graphene-silicon composite cathode material prepared by the mechanical peeling method. The method: can adopt industrialized equipment; utilizes non-toxic and non-polluting solvent; and is suitable for commercialization and large-scale production, and environmentally friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for silicon-carbon cathode composite material prepared by above method.