Method for preparing a precursor for cathode active material for secondary batteries

The co-precipitation process with controlled conditions and aluminum addition addresses inefficiencies in precursor production, yielding a high-yield precursor with improved properties for cathode active materials in secondary batteries.

WO2026104437A1PCT designated stage Publication Date: 2026-05-21UMICORE BATTERY MATERIALS FINLAND OY
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
UMICORE BATTERY MATERIALS FINLAND OY
Filing Date
2025-11-12
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing methods for manufacturing cathode active material precursors for secondary batteries face challenges in achieving simultaneous control over sphericity, tap density, specific surface area, and porosity, leading to inefficient production processes.

Method used

A co-precipitation process is employed using a non-oxidative environment, specific temperature and pH conditions, and the addition of aluminum to form a particulate material with controlled particle size, specific surface area, and porosity, resulting in a high-yield precursor with low alkali impurities.

Benefits of technology

The process achieves a high-yield precursor with narrow span, desirable specific surface area, and porosity, enhancing the performance of the cathode active material by improving ion transport and electrochemical reactions.

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Abstract

A method for manufacturing a particulate material comprising metal M' -based compound, being hydroxide, oxyhydroxide, oxide, or any combination thereof, wherein the metal M' is presented by Ni1-x-y-zMnxCoyAz, wherein 0.30≤1-x-y-z ≤0.99, 0.01≤x≤0.85, 0.01≤y≤0.40, A comprising Al with 0.001≤z≤0.100; and the method comprises carrying out a co-precipitation process by combining and mixing a precipitant, metal salts corresponding to metal M', and optionally a complexing agent, all in the form of aqueous solutions, to form a reaction mixture under reaction conditions, said reaction conditions including a non-oxidative environment, a temperature of the reaction mixture of 75–85°C, and a pH value of the reaction mixture of 10.0–12.5 as measured at 20°C, for 17–24 hours, until a slurry with a liquid phase and a solid phase containing particles with a median particle size D50 of 8–20 µm and a solid content of at least 750 g / L in the slurry is obtained.
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