A cobalt-doped silicon oxide / carbon composite negative electrode material and a preparation method thereof

By introducing cobalt nanoparticles into silicon oxide/carbon composite materials, the problems of active lithium loss and low conductivity in silicon oxide-based anode materials were solved, achieving fast charge-discharge performance and stability of high-energy-density lithium-ion batteries.

CN118684230BActive Publication Date: 2026-07-03CHINA MINMETALS GRP (HEILONGJIANG) GRAPHITE IND CO LTD +1
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA MINMETALS GRP (HEILONGJIANG) GRAPHITE IND CO LTD
Filing Date
2024-06-04
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing silicon oxide-based anode materials suffer from problems such as active lithium loss, low electronic conductivity, and volume expansion in lithium-ion batteries, resulting in poor cycle performance and rate performance, and failing to meet the requirements for high energy density.

Method used

A cobalt-doped silicon oxide/carbon composite anode material is used. By introducing cobalt nanoparticles into the silicon oxide and carbon composite material, the catalytic activity of cobalt is utilized to promote the reaction kinetics of lithium ions and reduce the loss of active lithium.

Benefits of technology

It improves the lithium storage and rate performance of lithium-ion batteries, enhances the conductivity of materials, reduces volume expansion, and improves cycle stability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN118684230B_ABST
    Figure CN118684230B_ABST
Patent Text Reader

Abstract

This invention provides a cobalt-doped silicon oxide / carbon composite anode material and its preparation method. The preparation method includes: mixing a silicon source, a first catalyst, a first surfactant, and water to carry out a first reaction, followed by centrifugation, washing, and drying to obtain a first product; carrying out a second reaction in a solvent with the first product, a second surfactant, a cobalt source, a carbon source, formaldehyde, and a second catalyst to obtain a second product; and calcining the second product under a protective atmosphere to obtain the cobalt-doped silicon oxide / carbon composite anode material. The technical solution provided by this invention is to improve the lithium storage capacity of batteries and achieve high-rate performance using SiO₂. x This provides an effective approach to constructing / C electrode materials and also offers new ideas for designing other high-performance electrode materials.
Need to check novelty before this filing date? Find Prior Art