A medium-high nickel low cobalt ternary positive electrode material and a preparation method thereof

By doping Al, Zr, and Y with single crystals and modifying them with F, W, and Ti coatings, the problems of poor rate performance and poor high-temperature storage performance of medium-high nickel and low cobalt ternary cathode materials have been solved, and the high stability and high efficiency of the materials have been achieved for application in power batteries.

CN116247179BActive Publication Date: 2026-06-09YICHANG BRUNP RECYCLING TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YICHANG BRUNP RECYCLING TECH CO LTD
Filing Date
2023-02-03
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Ternary cathode materials with medium-high nickel and low cobalt content suffer from poor rate performance and poor high-temperature storage properties, and are prone to gas generation.

Method used

Single-crystal doping was performed using specific raw materials Al, Zr, and Y elements, followed by the introduction of elements such as F, W, and Ti through two doping coatings to construct composite materials. These materials included preheating treatment of mixed phases Al2O3, ZrO, and Y2O3, coating modification with nano-cobalt and lithium sources, and secondary coating modification with γ-Al2O3 and titanium sources.

Benefits of technology

It significantly improves the rate performance and thermal stability of the material, avoids gas generation during high-temperature storage, and maintains the stability of electrochemical performance, making it suitable for power batteries.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The application discloses a kind of middle-high nickel low cobalt ternary positive electrode materials and preparation method thereof, belong to lithium ion battery technical field.The method is first with the Al, Zr and Y element of specific raw material single crystal doping, then after twice doping coating, introduce F, W, Ti and other elements to construct composite material, the product not only effectively solves the problem of poor rate performance of existing low cobalt ternary positive electrode material, simultaneously can effectively avoid the poor high-temperature storage of middle-high nickel ternary positive electrode material, prone to gas production phenomenon situation.The application also discloses the middle-high nickel low cobalt ternary positive electrode material prepared by the method and the application of power battery.
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