Positive electrode active material for rechargeable lithium battery, positive electrode including the same, and rechargeable lithium battery including the positive electrode

By using compounds with the chemical formulas Li1Mnz1Fex1Ay1PO4-c1 and Li2Nix2Mnz2Xc2O2-b2 as positive electrode active materials, combined with conductive materials and binders, a positive electrode active material layer is formed, which solves the shortcomings of existing lithium batteries in terms of energy density, operating voltage and conductivity, and achieves the goal of high-performance lithium batteries.

CN120854548APending Publication Date: 2025-10-28SAMSUNG SDI CO LTD
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Patent Information

Application Number
CN202510509642.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-04-25
Filing Date
2025-04-22
Publication Date
2025-10-28

AI Technical Summary

Technical Problem

The positive electrode active materials of existing rechargeable lithium batteries have deficiencies in energy density, operating voltage and conductivity, making it difficult to meet the requirements of high-performance batteries.

Method used

Compounds represented by the chemical formulas Li1Mnz1Fex1Ay1PO4-c1 and Li2Nix2Mnz2Xc2O2-b2 are used as positive electrode active materials. Combined with conductive materials and binders, a positive electrode active material layer is formed to improve battery performance.

Benefits of technology

This technology enables rechargeable lithium batteries with high energy density, high operating voltage, and high conductivity, thereby improving the overall performance of the battery.

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Abstract

A positive electrode active material for a rechargeable lithium battery, a positive electrode including the positive electrode active material, and a rechargeable lithium battery including the positive electrode are provided. The positive electrode active material includes a first particle including a compound represented by Li 1 Mn < z > 1 Fe < x > 1 A < y > 1 P < 4-c > 1, and a second particle including a compound represented by Li 2 Ni < x > 2 Mn < z > 2 < X > c < 2 > O < 2-b > 2. The cobalt (Co) content (e.g., amount) in the positive electrode active material is about 100 ppm or less.
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Citation Information

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