• 专利标题:   Manufacturing silicon-carbon-graphene composite from silicon sludge used for manufacturing secondary battery cathode material, involves processing colloidal solution containing silicone sludge, and mixing carbon precursor and graphene oxide.
  • 专利号:   KR1634723-B1
  • 发明人:   JANG H D, CHANG H K, CHOI J H, KIL D S
  • 专利权人:   KIGAM KOREA INST GEOSCIENCE MINERAL
  • 国际专利分类:   B01J019/10, B01J006/00, C01B031/04, C01B033/02, C07H003/02, H01M004/38, H01M004/587
  • 专利详细信息:   KR1634723-B1 30 Jun 2016 201653 Pages: 16
  • 申请详细信息:   KR1634723-B1 KR189280 30 Dec 2015
  • 优先权号:   KR189280

▎ 摘  要

NOVELTY - Manufacturing silicon-carbon-graphene composite from silicon sludge involves processing colloidal solution containing silicone sludge and mixing water-soluble carbon precursor and graphene oxide under ultrasonic conditions. The mixture is heat-treated and then dried to obtain silicon-carbon precursor-graphene oxide composite. The colloidal solution is sprayed on silicon carbide particle. The upper portion of the colloidal solution, carbon precursor and graphene oxide are mixed with silicon carbide particle to obtain silicon-carbon-graphene composite having the core-shell structure. USE - Method for manufacturing silicon-carbon-graphene composite from silicon sludge used for manufacturing secondary battery cathode material (claimed). ADVANTAGE - The method enables to manufacture silicon-carbon-graphene composite from silicon sludge that has maximum capacity of 372 milliAmpere-hour/g, high charging and discharging capacity and excellent cycleability. DETAILED DESCRIPTION - Manufacturing silicon-carbon-graphene composite from silicon sludge involves processing colloidal solution containing silicone sludge and mixing water-soluble carbon precursor and graphene oxide under ultrasonic conditions. The mixture is heat-treated and then dried to obtain silicon-carbon precursor-graphene oxide composite. The colloidal solution is sprayed on silicon carbide particle. The upper portion of the colloidal solution, carbon precursor and graphene oxide are mixed with silicon carbide particle to obtain silicon-carbon-graphene composite having the core-shell structure, where silicon particles surround graphene shell coated with carbon. The thickness of the carbon coating is 2-5nm and thickness of graphene shell is 3-15nm.