Antimony-based composite negative electrode material, and preparation method and application thereof

By preparing antimony-based composite anode materials, and using ball milling and spray drying techniques to form a three-dimensional conductive network and an organic SEI film, the volume expansion problem of antimony-based anode materials in sodium-ion batteries was solved, thereby improving electrochemical performance and cycle stability.

CN119092665BActive Publication Date: 2025-12-12NANCHANG UNIV
2 Cites 0 Cited by

Patent Information

Application Number
CN202411165914.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-23
Publication Date
2025-12-12
Estimated Expiration
2044-08-23

AI Technical Summary

Technical Problem

In sodium-ion batteries, the volume of antimony metal changes drastically during the insertion and extraction of sodium ions, leading to electrode breakage and pulverization, which in turn results in decreased electrochemical performance and poor cycle stability.

Method used

Antimony-based intermediates were prepared by ball milling antimony metal powder with amorphous carbon precursors, and then combined with acidified and modified carbon nanotubes to form a three-dimensional conductive network. The antimony-based intermediates were locked in the network by spray drying technology to form an organic SEI film to protect the anode material.

Benefits of technology

It effectively suppressed the volume expansion of antimony metal, improved the conductivity and structural stability of the negative electrode material, and extended the service life and electrochemical performance of sodium-ion batteries.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The application provides an antimony-based composite negative electrode material and a preparation method and application thereof, and relates to the technical field of new energy batteries.The preparation method provided by the application comprises the following steps: mixing antimony metal powder with amorphous carbon, ball-milling, drying and calcining to obtain an antimony-based intermediate; performing acidification treatment on the surface of carbon nanotubes to obtain acidified carbon nanotubes, dispersing the acidified carbon nanotubes in an organic sodium modified solution, stirring, filtering, drying to obtain modified carbon nanotubes; mixing and dispersing the antimony-based intermediate, sodium polyacrylate and the modified carbon nanotubes to obtain a suspension, and then performing spray drying to obtain the antimony-based composite negative electrode material.The preparation method provided by the application can improve the problem of performance decline caused by the capacity attenuation of the antimony metal due to the huge volume expansion in the process of deintercalating sodium ions, and effectively improves the electrochemical performance of the antimony-based negative electrode material.
Need to check novelty before this filing date? Find Prior Art