公开(公告)号：US11967716B2

公开(公告)日：2024-04-23

申请号：US17584732

申请日：2022-01-26

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Ziqiang Shao ,  Shuai Jia ,  Jie Wei ,  Zhen Huang ,  Baixue Gong

IPC: H01M4/58 ,  C01G53/11 ,  H01M4/02

CPC classification number: H01M4/5815 ,  C01G53/11 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/34 ,  C01P2006/40 ,  H01M2004/021

Abstract: Disclosed is a hollow sulfide microsphere with enriched sulfur vacancies, which is prepared by a method comprising the steps of: dissolving cobalt nitrate and nickel nitrate in a mixed solution of N, N-dimethylformamide and acetone with an equal volume; then adding a chelating agent thereto, subjecting a resulting mixture to a solvothermal reaction to obtain a coordination polymer microsphere; dissolving the coordination polymer microsphere and a sulfurization agent in an organic solvent, and reacting to obtain a hollow sulfide microsphere; and subjecting the hollow sulfide microsphere to reduction treatment with sodium borohydride, centrifuging, washing and drying to obtain the hollow sulfide microsphere with enriched sulfur vacancies having a particle size of 1-2.5 μm, a shell thickness of 15-30 nm and a specific capacity of the material of 763.4 C g−1 (current density is 1 A g−1).