Preparation method and application of titanium dioxide coated spinel structure magnesium vanadium oxide

By coating magnesium vanadium oxide with titanium dioxide, the problems of structural collapse and poor conductivity in magnesium-ion battery cathode materials during charge and discharge have been solved, achieving high conductivity and structural stability of the material, and improving discharge specific capacity and cycle performance.

CN121439739APending Publication Date: 2026-01-30QINGHAI SALT LAKE IND +1
0 Cites 0 Cited by

Patent Information

Application Number
CN202511549444.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-28
Publication Date
2026-01-30

AI Technical Summary

Technical Problem

Magnesium-ion battery cathode materials are prone to structural collapse during charging and discharging, resulting in reduced capacity and poor conductivity, as well as significant resistance to magnesium ion diffusion.

Method used

A method for preparing spinel-structured magnesium vanadium oxide coated with titanium dioxide was adopted. The magnesium vanadium oxide Mg3V2O6 and TiO2 were mixed in a certain proportion, ball-milled, and then calcined under an inert atmosphere to obtain magnesium vanadium oxide Mg3V2O6@TiO2 uniformly coated with titanium dioxide. The high conductivity and chemical stability of TiO2 were used to improve the structural stability and magnesium ion diffusion performance of the material.

Benefits of technology

It improves the conductivity and electrochemical stability of magnesium vanadium oxide, enhances the structural stability and magnesium ion diffusion capacity of the material, and improves the discharge specific capacity and cycle stability of the cathode material.

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

Abstract

The invention relates to a preparation method and application of a titanium dioxide coated spinel structure magnesium vanadium oxide, and the titanium dioxide coated spinel structure magnesium vanadium oxide is obtained by the following method: step 1, mixing magnesium vanadium oxide Mg3V2O6 and TiO2 according to a mass ratio of 100: (0.5-10), with a ball-to-material ratio of (5-20): 1, and carrying out ball milling for 2-24 h at a rotating speed of 100-1000 r / min; and 2, heating the ball-milled mixed powder to 200-700 DEG C at a heating rate of 1-10 DEG C / min in an inert gas atmosphere, and calcining for 1-15 hours to obtain the magnesium vanadium oxide Mg3V2O6-coated TiO2 uniformly coated with titanium dioxide. The titanium dioxide coated spinel structure magnesium vanadium oxide is used for a positive electrode material of a secondary magnesium ion battery. The invention aims to realize uniform coating of TiO2 through a simple ball milling process, reduce the particle size of the material, and improve the specific capacity and stability of the positive electrode material in the circulation process.
Need to check novelty before this filing date? Find Prior Art