Secondary and Tertiary Composite Particles

JP2025507646A5Pending Publication Date: 2026-03-03セネート アクティーゼルスカブ
0 Cites 0 Cited by

Patent Information

Application Number
JP2024549628
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-02-24
Filing Date
2023-02-22
Publication Date
2026-03-03

AI Technical Summary

Technical Problem

The negative electrode materials of existing lithium-ion batteries, especially graphite, are difficult to meet the needs of improving characteristic energy, and silicon, as a substitute material, causes structural damage to the volume changes during charging and discharging, affecting battery performance.

Method used

A method is used to prepare secondary or tertiary composite particles as active substances of the negative electrode material, including silicon particles embedded in the carbon-based matrix. The process involves forming a gas phase reaction mixture containing silicon and carbon and processing at high temperatures to form a carbon-enriched outer layer and core of silicon particles.

Benefits of technology

The composite particulate material prepared by this method significantly improves the battery capacity and cycle stability in lithium-ion batteries, reduces structural damage caused by volume changes in silicon particles during charging and discharging, and extends the service life of the battery.

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

Abstract

The present invention relates to a method for making secondary composite particles, secondary composite particles, a method for making tertiary composite particles, tertiary composite particles, and a secondary electrochemical cell utilizing the secondary or tertiary composite particles as the active material of the negative electrode of a secondary electrochemical cell, each tertiary composite particle comprising a plurality of secondary composite particles embedded in a second matrix made primarily of carbon, each secondary composite particle comprising a plurality of primary particles embedded in a first matrix, the primary particles being composed primarily of silicon, and the first matrix comprising silicon and carbon.
Need to check novelty before this filing date? Find Prior Art