Coated particle and method for manufacturing same
WO2025187800A8 Publication Date: 2025-10-02MITSUI MINING & SMELTING CO LTD
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Patent Information
- Application Number
- PCT/JP2025/008324
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-06-13
- Filing Date
- 2025-03-06
- Publication Date
- 2025-10-02
AI Technical Summary
Technical Problem
Lithium manganese oxide-based positive electrodes in secondary batteries suffer from manganese element dissolution during charging and discharging, leading to decreased battery performance.
Method used
Coated particles with a core particle containing a spinel-type composite oxide of lithium and manganese, and a coating layer composed of lanthanum and zirconium oxides are developed to suppress manganese elution and enhance battery performance.
Benefits of technology
The coating effectively reduces manganese elution, maintaining battery performance and capacity retention, with the coating layer uniformly applied to ensure minimal exposure and optimal ion interaction.
✦ Generated by Eureka AI based on patent content.
Abstract
Coated particles according to the present invention each have a core particle and a coating layer disposed on at least a portion of the surface of the core particle. The core particle contains a spinel-type composite oxide including elemental lithium and elemental manganese. The coating layer contains an oxide of elemental zirconium and elemental lanthanum. The elemental lanthanum content is preferably 0.01-1.0 mass% when the mass of the coated particles is defined as 100 mass%. The elemental zirconium content is preferably 0.01-1.0 mass% when the mass of the coated particles is defined as 100 mass%.
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