Amorphous tin sulfide / nitrogen-doped carbon composite oriented tubular material and preparation method and application thereof

By using amorphous stannous sulfide/nitrogen doped carbon composite directional tubular material in potassium ion batteries, the problem of volume change and structural damage of potassium ion battery materials during K+ embedding/de-embedding is solved, and high energy density and Good cycle performance.

CN115692689BActive Publication Date: 2025-02-07FUJIAN JUDIAN NEW ENERGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202211393912.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-08
Publication Date
2025-02-07
Estimated Expiration
2042-11-08

AI Technical Summary

Technical Problem

The existing potassium ion battery materials are prone to volume changes and structural damage during the K+ embedding/de-embedding process, resulting in reduced energy density and poor circulation performance.

Method used

Amorphous stannous sulfide/nitrogen doped carbon composite directional tubular material is used to prepare a porous tubular structure through coaxial electrospinning technology. The stannous sulfide is amorphous and embedded in the nitrogen-doped porous carbon tube skeleton to form an amorphous shape. SnS, buffers volume changes and improves conductivity.

Benefits of technology

The highly reversible K+ deintercalation of stannous sulfide is achieved, which improves electrochemical stability and cyclic properties, enhances reaction kinetics and conductivity, alleviates the pressure caused by volume changes, and inhibits the powdering of the active material.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN115692689B_ABST
    Figure CN115692689B_ABST
Patent Text Reader

Abstract

The present invention discloses an amorphous stannous sulfide / nitrogen-doped carbon composite oriented tubular material and a preparation method and application thereof, belonging to the technical field of potassium ion battery materials. The stannous sulfide / nitrogen-doped carbon composite material is a porous oriented tubular structure. A carbon-forming nitrogen-containing polymer and a pore-forming polymer are added to a solvent to obtain a solution A. A tin salt is added to a solvent to obtain a solution B. The two are mixed to obtain an electrostatic spinning precursor solution. Through coaxial electrostatic spinning, an oriented nanotube negative electrode precursor is obtained. The stannous sulfide / nitrogen-doped carbon composite material is obtained after sulfurization, soaking, pre-carbonization and carbonization in sequence. The amorphous nature of stannous sulfide helps to improve the electrochemical stability. The nitrogen-doped porous carbon tube skeleton not only improves the conductivity of the composite electrode material, but also buffers the volume change of stannous sulfide during the charge and discharge cycle. The oriented structure accelerates the transmission speed of electrons and ions and improves the reaction kinetics.
Need to check novelty before this filing date? Find Prior Art