POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND PROCESS FOR PRODUCING SAME, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE POSITIVE ELECTRODE ACTIVE MATERIAL

POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND PROCESS FOR PRODUCING SAME, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE POSITIVE ELECTRODE ACTIVE MATERIAL

A positive electrode active material for non-aqueous electrolyte secondary battery with improved cycle characteristics and high temperature storage characteristics, without impairing an advantage of high capacity which lithium nickel composite oxide inherently possesses. The positive electrode activ...

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Bibliographische Detailangaben
Hauptverfasser: YAMAUCHI, Mitsuru, USHIO, Ryozo
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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Zusammenfassung:A positive electrode active material for non-aqueous electrolyte secondary battery with improved cycle characteristics and high temperature storage characteristics, without impairing an advantage of high capacity which lithium nickel composite oxide inherently possesses. The positive electrode active material for non-aqueous electrolyte secondary battery includes lithium nickel composite oxide represented by a general formula (1): Li1+uNi1−x−y−zCoxMnyMgzO2 (However, u, x, y and z in the formula satisfies 0.015≤u≤0.030, 0.05≤x≤0.20, 0.01≤y≤0.10, 0.01≤z≤0.05, 0.10≤x+y+z≤0.25.), and wherein crystallite diameter is 100 nm to 130 nm. In addition, the positive electrode active material for non-aqueous electrolyte secondary battery is produced at least by an oxidation roasting step, a mixing step, and a calcining step.