POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND MANUFACTURING METHOD THEREOF

To provide a positive electrode active material for a lithium ion secondary battery, having a high cycle capacity-keeping rate.SOLUTION: A positive electrode active material for a lithium ion secondary battery comprises: particles of lithium nickel composite oxide; and a coating layer on the surface...

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Hauptverfasser:	TOMA MIKAKO, HAYASHI KAZUHIDE
Format:	Patent
Sprache:	eng ; jpn
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:	To provide a positive electrode active material for a lithium ion secondary battery, having a high cycle capacity-keeping rate.SOLUTION: A positive electrode active material for a lithium ion secondary battery comprises: particles of lithium nickel composite oxide; and a coating layer on the surface of each particle. The particles have a crystal structure belonging to a space group R-3m, and contains at least Li, Ni, Mn and an element M; the composition of the elements is given by Li:Ni:Mn:M:Nb=a:(1-x-y):x:y:z(0.95≤a≤1.10, 0