• 专利标题:   Preparation of silicon carbon negative electrode material used in lithium-ion battery, involves mixing silicon source and amino graphene, adding initiator to prepare halogenated composite material, mixing with catalyst, electrolyte, reaction monomer, and solvent, separating and calcining.
  • 专利号:   CN115784233-A
  • 发明人:   CHENG H, GENG M, LI C, CHEN B, TAN Y, PENG S
  • 专利权人:   ZHEJIANG XINAN CHEM IND GROUP CO LTD
  • 国际专利分类:   B82Y030/00, C01B032/15, C01B033/02, C01B033/021, H01M010/0525, H01M004/36, H01M004/38, H01M004/62
  • 专利详细信息:   CN115784233-A 14 Mar 2023 C01B-033/02 202326 Chinese
  • 申请详细信息:   CN115784233-A CN11502452 28 Nov 2022
  • 优先权号:   CN11502452

▎ 摘  要

NOVELTY - Preparation of silicon carbon negative electrode material involves (s1) mixing silicon source and amino graphene and performing electrophoresis to prepare amino graphene/silicon source composite material, (s2) mixing the amino graphene/silicon source composite material and initiator and heating and reacting to prepare halogenated amide-modified graphene/silicon source composite material, (s3) mixing the halogenated amide-modified graphene/silicon source composite material, catalyst, electrolyte, reaction monomer, and solvent, performing electrochemical reaction under inert atmosphere, and (s4) separating the solid and liquid of the reaction product, drying the obtained solid and calcining under inert atmosphere. The silicon source is nano-silicon or silicon oxide. USE - Preparation of silicon carbon negative electrode material used in lithium-ion battery (all claimed). ADVANTAGE - The method can synthesize resin on surface of silicon by electrochemical method, and the silicon is supplemented with lithium through action of electric field, which improves the first effect of the silicon-carbon negative electrode material, and carbon layer is not easy to break, which helps to improve the cycle performance and energy density of the silicon-carbon negative electrode material.