Positive electrode active material precursor for secondary battery and positive electrode active material

The use of a core-shell structured positive electrode active material with nickel and zirconium in the core and cobalt and nickel in the shell addresses the structural instability and gas generation issues in high nickel content batteries, enhancing performance and lifespan.

JP2025037833APending Publication Date: 2025-03-18ECOPRO BM CO LTD
12 Cites 0 Cited by

Patent Information

Application Number
JP2024150097
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-06
Filing Date
2024-08-30
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

Existing positive electrode active materials in secondary batteries, particularly those with high nickel content, face issues such as structural instability, cation mixing, and excessive gas generation during charge and discharge cycles, leading to reduced lifespan and performance.

Method used

The development of positive electrode active material precursor particles with a core-shell structure, where the core contains nickel and zirconium and the shell contains cobalt, nickel, and/or manganese, helps to suppress direct contact with the electrolyte, maintain a layered structure, and regulate primary particle growth.

Benefits of technology

This approach enhances the structural stability and charge/discharge capacity of the positive electrode active material, while significantly reducing gas generation and improving high-temperature storage characteristics.

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

Abstract

To provide a positive electrode active material precursor capable of suppressing a direct contact between a front surface and an electrolyte in order to reduce a gas generation amount directly applied to an influence to a reduction of life, and in which a bulk structure is enhanced, and provide a positive electrode active material.SOLUTION: An positive electrode active material precursor particle and / or a positive electrode active material particle, according to an aspect of the present invention, contains a core part and a shell part. The core part contains nickel (Ni) and zirconium (Zr). The shell part and cobalt (Co). A nickel (Ni) mol% value of the core part is larger than a nickel (Ni) mol% of the shell part. A zirconium (Zr) mol% value of the core part is larger than a zirconium (Zr) mol% of the shell part. The mol% value of the cobalt (Co) of the shell part is larger than the cobalt (Co) mol% value of the core part.SELECTED DRAWING: Figure 1
Need to check novelty before this filing date? Find Prior Art