Positive electrode active material for nonaqueous electrolyte secondary batteries, method for manufacturing the same, and nonaqueous electrolyte secondary battery using said positive electrode active material

The present invention aims to provide a positive electrode active material for nonaqueous electrolyte secondary batteries which achieves high output and high capacity when used as a positive electrode material. Disclosed is a method for manufacturing the positive electrode active material for nonaqu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MORI KENSAKU, KOKADO REI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INORGANIC CHEMISTRY MANUFACTURE OR TREATMENT OF NANOSTRUCTURES MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY NANOTECHNOLOGY PERFORMING OPERATIONS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY PUNCHING METAL REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	The present invention aims to provide a positive electrode active material for nonaqueous electrolyte secondary batteries which achieves high output and high capacity when used as a positive electrode material. Disclosed is a method for manufacturing the positive electrode active material for nonaqueous electrolyte secondary batteries, the method comprising: a first step, wherein an alkaline solution with a tungsten compound dissolved therein is added to and mixed with a lithium metal composite oxide powder represented by a general formula LizNi1-x-yCoxMyO2 (wherein, 0.10 x 0.35, 0 y 0.35, 0.97 Z 1.20, and M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti, and Al), including primary particles and secondary particles composed of aggregation of the primary particles, and thereby W is dispersed on a surface of the primary particles; and a second step, wherein, by heat treating the mixture of the alkaline solution with the tungsten compound dissolved therein and the lithium metal composite oxide powder, fine particles containing W and Li are formed on a surface of the primary particles.