POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING SAME

Title:

POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING SAME

Document Type and Number:

WIPO Patent Application WO/2011/089958

Kind Code:

A1

Abstract:

Disclosed are: a positive electrode active material for a nonaqueous electrolyte secondary battery, which has high capacity and excellent thermal stability and is composed of lithium-nickel complex oxide; a commercially suitable method for producing the positive electrode active material for a nonaqueous electrolyte secondary battery; and a highly safe nonaqueous electrolyte secondary battery. Specifically disclosed is a positive electrode active material for a nonaqueous electrolyte secondary battery, which is composed of lithium-nickel complex oxide having the composition formula (1) below. The amount of lithium present in the surface of the lithium-nickel complex oxide is not more than 0.10% by mass. The positive electrode active material is obtained by washing a fired powder with water within a temperature range of 10-40˚C, and then filtering and drying the resulting powder. LibNi1-aM1aO2 (1) (In the formula, M1 represents at least one element selected from among transition metal elements other than Ni, group 2 elements and group 13 elements; a satisfies 0.01 ≤ a ≤ 0.5; and b satisfies 0.85 ≤ b ≤ 1.05.)

Inventors:

SASAOKA HIDEO (JP)
IWANAGA TOMOKO (JP)
MATSUMOTO SATOSHI (JP)
KAWATATE YUTAKA (JP)
ARIMOTO SHINJI (JP)

Application Number:

PCT/JP2011/050392

Publication Date:

July 28, 2011

Filing Date:

January 13, 2011

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)
PANASONIC CORP (JP)
SASAOKA HIDEO (JP)
IWANAGA TOMOKO (JP)
MATSUMOTO SATOSHI (JP)
KAWATATE YUTAKA (JP)
ARIMOTO SHINJI (JP)

International Classes:

H01M4/525; C01G53/00; H01M4/505

Foreign References:

JP2007273108A	2007-10-18
JP2009266712A	2009-11-12
JP2008218122A	2008-09-18

Attorney, Agent or Firm:

KAWABI Kenji (JP)
Kenji Kawabi (JP)

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Claims:

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