Precursor for Preparation of Cathode Active Material

A dual-density precursor for positive electrode active materials with a high-density core and low-density surface addresses lithium diffusion issues, enhancing charge/discharge efficiency and structural stability in secondary batteries.

KR102993169B1Active Publication Date: 2026-07-21L & F CO LTD
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Patent Information

Application Number
KR1020230123845
Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-09-19
Filing Date
2023-09-18
Publication Date
2026-07-21
Estimated Expiration
2043-09-18

AI Technical Summary

Technical Problem

Existing high-Ni based cathode active materials suffer from low charge/discharge efficiency due to lithium diffusion issues, structural instability, and poor cycle life and thermal stability during charging and discharging.

Method used

A precursor for a positive electrode active material is designed with a high-density core and a low-density surface, allowing for easy lithium diffusion and structural stability, achieved by varying the composition and density of the core and surface regions through controlled co-precipitation reactions.

Benefits of technology

The dual-density structure enhances charge/discharge efficiency, improves cycle life, and ensures thermal stability by facilitating lithium diffusion to the core, thereby improving the performance of secondary batteries.

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Abstract

The present invention provides a precursor for manufacturing an anode active material, characterized in that the central part and the surface part are sequentially formed from the center of the particle toward the outer surface, and the surface part has a relatively lower density compared to the central part.
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Citation Information

Patent Citations

  • Nickel-based active material precursor for lithium secondary battery, preparing method thereof, nickel-based active material for lithium secondary battery formed thereof, and lithium secondary battery comprising positive electrode including the nickel-based active material

    KR1020180063860A

  • Positive electrode active material precursor for secondary battery, positive electrode active material and lithium secondary battery comprising the same

    KR1020210097059A