公开(公告)号：US11670774B2

公开(公告)日：2023-06-06

申请号：US16650606

申请日：2018-09-04

申请人： Beijing HiNa Battery Technology Co., Ltd. ,  Institute of Physics, The Chinese Academy of Sciences

发明人： Yaxiang Lu ,  Yongsheng Hu ,  Kun Tang ,  Hong Li ,  Xuejie Huang ,  Liquan Chen

IPC分类号： H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/054 ,  H01M4/583 ,  H01M4/02 ,  H01M4/587

CPC分类号： H01M4/583 ,  H01M4/0442 ,  H01M4/133 ,  H01M4/1393 ,  H01M10/054 ,  H01M4/049 ,  H01M4/0471 ,  H01M4/587 ,  H01M2004/027

摘要： Embodiments of the present disclosure are a pitch-based negative electrode material for a sodium-ion battery and related methods and applications. The method comprises: placing a pitch recursor into a muffle furnace to allow the pitch precursor to experience pre-oxidation for 2 to 6 hours at a temperature ranging from 200° C. to 350° C., to obtain pre-oxidized pitch; placing the pre-oxidized pitch into a high-temperature carbonization furnace, and increasing the temperature to 1300° C. to 1600° C. at a temperature increase speed of 0.5° C./min to 5° C./min, and carrying out thermal treatment on the pre-oxidized pitch in an inert atmosphere for 1 to 10 hours, to allow the pre-oxidized pitch to experience carbonization reactions, oxygen in the pre-oxidized pitch being used for breaking an ordered structure of the pitch during the carbonization of the pre-oxidized pitch, so as to form a wedge-shaped voids disordered structure.

公开(公告)号：US20210202942A1

公开(公告)日：2021-07-01

申请号：US16650606

申请日：2018-09-04

申请人： Beijing HiNa Battery Technology Co., Ltd. ,  Institute of Physics, The Chinese Academy of Sciences

发明人： Yaxiang Lu ,  Yongsheng Hu ,  Kun Tang ,  Hong Li ,  Xuejie Huang ,  Liquan Chen

IPC分类号： H01M4/583 ,  H01M10/054 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/04

摘要： Embodiments of the present disclosure are a pitch-based negative electrode material for a sodium-ion battery and related methods and applications. The method comprises: placing a pitch recursor into a muffle furnace to allow the pitch precursor to experience pre-oxidation for 2 to 6 hours at a temperature ranging from 200° C. to 350° C., to obtain pre-oxidized pitch; placing the pre-oxidized pitch into a high-temperature carbonization furnace, and increasing the temperature to 1300° C. to 1600° C. at a temperature increase speed of 0.5° C./min to 5° C./min, and carrying out thermal treatment on the pre-oxidized pitch in an inert atmosphere for 1 to 10 hours, to allow the pre-oxidized pitch to experience carbonization reactions, oxygen in the pre-oxidized pitch being used for breaking an ordered structure of the pitch during the carbonization of the pre-oxidized pitch, so as to form a wedge-shaped voids disordered structure.