POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM ION BATTERY, PREPARING METHOD OF THE SAME, AND RECHARGEABLE LITHIUM ION BATTERY COMPRISING THE SAME

POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM ION BATTERY, PREPARING METHOD OF THE SAME, AND RECHARGEABLE LITHIUM ION BATTERY COMPRISING THE SAME

The present disclosure relates to a positive electrode active material for rechargeable lithium ion batteries and a method of preparing the positive electrode active material, in which a compound including sulfur is used as an additive in a wet treatment process to remove residual lithium impurities...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PARK, Eun Hui, PARK, Hye Won, KIM, Sun Tai
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:The present disclosure relates to a positive electrode active material for rechargeable lithium ion batteries and a method of preparing the positive electrode active material, in which a compound including sulfur is used as an additive in a wet treatment process to remove residual lithium impurities (LiOH, Li2CO3) present on a surface of the positive electrode active material, such that the residual lithium impurities are effectively removed without loss of capacity while a Li-S compound coating layer is formed on the surface thereof, thereby reducing resistance and leakage current.