公开(公告)号：US20240396040A1

公开(公告)日：2024-11-28

申请号：US18201678

申请日：2023-05-24

Applicant: NANJING TECH UNIVERSITY

Inventor： ZHIRONG WANG ,  YANAN WEI ,  JUNLING WANG

IPC: H01M4/58 ,  C01G53/00 ,  H01M4/36 ,  H01M4/583 ,  H01M4/62 ,  H01M10/42 ,  H01M50/403 ,  H01M50/417 ,  H01M50/431 ,  H01M50/446 ,  H01M50/451 ,  H01M50/46

Abstract: Disclosed in the present invention are methods for preparing a CoNi—S@3D-C nanocomposite and a modified battery separator. The CoNi—S@3D-C material synthesized by the method of the present invention is applicable not only to a lithium-ion battery but also to a sodium-ion battery. As the anode for both the lithium-ion and sodium-ion batteries, it exhibits good energy storage performance, maintaining very stable performance even under high-density current charging and discharging cycles, while also possessing very high reversible capacity. The heteroatom-doped three-dimensional nanocarbon structure achieves good encapsulation of the metal sulfides, and can effectively inhibit the volume expansion of the metal sulfides, slowing down the decline of its specific capacity and maintaining the high capacity and service life of the anode material. The CoNi—S@3D-C material of the present invention can also be used as a material for modifying a separator of a lithium-sulfur battery. The modified separator can improve the safety performance of the lithium-sulfur battery while maintaining a high energy storage effect of the battery and slowing down the capacity decline of the lithium-sulfur battery.