• 专利标题:   Carbon-coated graphite anode material comprises graphite, graphene layer comprising graphene oxide dispersion liquid coated on outer periphery of graphite and carbonaceous layer comprising cracked carbon coated on graphene layer.
  • 专利号:   CN112886008-A
  • 发明人:   PENG F, YANG Y
  • 专利权人:   QINGHAI KAIJIN NEW ENERGY MATERIALS CO
  • 国际专利分类:   C01B032/05, C01B032/182, C01B032/194, C01B032/20, C01B032/21, H01M010/0525, H01M004/587, H01M004/62
  • 专利详细信息:   CN112886008-A 01 Jun 2021 H01M-004/587 202158 Pages: 9 Chinese
  • 申请详细信息:   CN112886008-A CN10071486 19 Jan 2021
  • 优先权号:   CN10071486

▎ 摘  要

NOVELTY - Carbon-coated graphite anode material comprises 70-80 wt.% graphite, 5-10 wt.% graphene layer coated on the outer periphery of the graphite and 12-25 wt.% carbonaceous layer coated on the graphene layer, where the graphene layer comprises graphene oxide dispersion liquid, the carbonaceous layer comprises cracked carbon using carbon precursor and the carbon precursor comprises organic matter. USE - As carbon-coated graphite anode material. ADVANTAGE - The anode material has long cycle life, high specific capacity and long service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing carbon-coated graphite anode material involving (i) dispersing graphite in a solvent, uniformly mixing, adding graphene oxide dispersion liquid, ultrasonically treating for 20-60 minutes, dripping polyacrylamide to coagulate the graphene oxide dispersion liquid, and taking precipitation material, (ii) heating and reducing the precipitation material to graphene at a high temperature and cooling to obtain graphite material covering the graphene layer, dispersing the graphite material covering the graphene layer in a carbon precursor, uniformly mixing and (iii) performing carbon coating treatment to form crude carbon-coated graphite anode material product and carbonizing the crude carbon-coated graphite negative electrode material.