A vanadium-sodium composite doped co-coated ternary positive electrode material, preparation method and application

CN116314747BActive Publication Date: 2025-09-23HUADING GUOLIAN SICHUAN BATTERY MATERIALS CO LTD
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Patent Information

Application Number
CN202310300799.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-27
Publication Date
2025-09-23
Estimated Expiration
2043-03-27

AI Technical Summary

Technical Problem

The conductivity of existing lithium-ion battery positive electrode materials is low, which affects the charging time and discharge performance. In addition, the structure is not stable enough, making it difficult to meet the requirements of high rate and long cycle.

Method used

The ternary positive electrode material is co-coated with vanadium-sodium composite doping. The co-doping modification of Na3VO4, MgO, Al2O3 and TiO2, combined with the coating modification of Na3VO4, WO3 and ZrO2, forms the LiNixCoyMnzVaNabAlcMgdTieWfZrgO2 structure, which improves the electrical conductivity and structural stability of the material.

Benefits of technology

It improves the gram-to-gram capacity, rate performance and cycle performance of lithium-ion batteries, reduces the cell impedance, enhances the high-temperature electrochemical properties and corrosion resistance of the material, and improves the application performance of the battery.

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Abstract

The present invention provides a vanadium-sodium composite doped co-coated ternary positive electrode material, a preparation method, and an application thereof, belonging to the technical field of lithium-ion batteries. The vanadium-sodium composite doped co-coated ternary positive electrode material of the present invention adopts a composite modification method of multi-element co-doping and coating based on traditional nickel-cobalt-manganese materials, using Na3VO4, MgO, Al2O3, and TiO2 for co-doping modification, and using Na3VO4, WO3, and ZrO2 as coating agents for coating modification. Through V / Na co-doping and synergistic / Mg / Al / Ti / doping and synergistic W / Zr coating, the structural stability and thermal stability, rate / cycle / storage performance, etc. of the ternary positive electrode material under high voltage or high nickel conditions are improved, and the material has the advantages of more stable layered structure, higher electronic conductivity, better rate, long cycle performance storage, and high specific capacity.
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Citation Information

Patent Citations

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