公开(公告)号：US20240014382A1

公开(公告)日：2024-01-11

申请号：US18372711

申请日：2023-09-26

申请人： GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD. ,  HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD. ,  HUNAN BRUNP EV RECYCLING CO., LTD.

发明人： Xia Fan ,  Changdong Li ,  Zhenhua Zhang ,  Linlin Mao ,  Dingshan Ruan ,  Yong Cai

IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/54 ,  B09B3/35 ,  B09B3/70

CPC分类号： H01M4/364 ,  H01M4/386 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/54 ,  B09B3/35 ,  B09B3/70 ,  H01M2004/027

摘要： The present disclosure belongs to the technical field of battery materials, and discloses a silicon/carbon composite anode material, and a preparation method and use thereof. The preparation method includes the following steps: S1. dissolving a graphite anode powder in an acid solution, and conducting solid-liquid separation (SLS) to obtain a precipitate; and washing and drying the precipitate, adding a reducing agent, and subjecting a resulting mixture to heat treatment to obtain a purified graphite material; and S2. mixing a modified silicon powder with the graphite material, adding a resulting mixture to a polyimide (PI)-containing N,N-dimethylformamide (DMF) solution, and stirring; and subjecting a resulting mixture to distillation and then to carbonization to obtain the silicon/carbon composite anode material.