公开(公告)号：US20230317932A1

公开(公告)日：2023-10-05

申请号：US18331260

申请日：2023-06-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhiyu XIA ,  Yunjian MA ,  Mingfeng LIN ,  Bing CHEN ,  Yuping HUANG ,  Jianping ZHANG ,  Yanhui LI ,  Yumeng LIU

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/134

CPC classification number: H01M4/366 ,  H01M4/386 ,  H01M4/134

Abstract: This application provides a yolk core-shell structured composite material, a preparation method of the material, and a secondary battery containing the material. The yolk core-shell structured composite material includes a core and a shell. A cavity exists between the core and the shell. The core includes a phosphorus-doped silicon material, and the shell includes a nitrogen-doped carbon material. This application can improve a capacity and a capacity retention rate of the battery.