Positive electrode active material for secondary battery, positive electrode comprising same, secondary battery, and method for manufacturing same

The introduction of a nitrogen-doped metal oxide coating layer on lithium metal oxide cores within the positive electrode active material addresses the interfacial issues in all-solid-state batteries, enhancing resistance and lifespan.

WO2025116597A1PCT designated stage expired Publication Date: 2025-06-05LG ENERGY SOLUTION LTD
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Patent Information

Application Number
PCT/KR2024/019248
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-29
Filing Date
2024-11-29
Publication Date
2025-06-05

AI Technical Summary

Technical Problem

All-solid-state batteries face issues such as decreased battery capacity due to interfacial side reactions between the positive electrode active material and the solid electrolyte, and uneven electrode charge distribution caused by interfacial resistance and space-charge layer formation.

Method used

A positive electrode active material is developed, comprising a lithium metal oxide core with a coating layer containing a nitrogen-doped metal oxide, specifically represented by the chemical formula Li_aM_1_bO_c, where 0

Benefits of technology

The nitrogen-doped metal oxide coating layer enhances the battery's resistance and lifespan by reducing interfacial reactions and electrode resistance, thereby improving the overall performance and longevity of the all-solid-state battery.

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Abstract

The present invention relates to a positive electrode active material for a secondary battery, a positive electrode comprising same, a secondary battery, and a method for manufacturing same and, more specifically, to a positive electrode active material including a core and a lithium oxide-containing coating layer including nitrogen.
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Citation Information

Patent Citations

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