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1. (WO2010113512) POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND LITHIUM ION SECONDARY BATTERY

Pub. No.:    WO/2010/113512    International Application No.:    PCT/JP2010/002389
Publication Date: Fri Oct 08 01:59:59 CEST 2010 International Filing Date: Thu Apr 01 01:59:59 CEST 2010
IPC: H01M 4/525
H01M 4/505
H01M 10/052
H01M 10/0566
Applicants: Panasonic Corporation
パナソニック株式会社
HIRATSUKA, Hidekazu
平塚秀和
Inventors: HIRATSUKA, Hidekazu
平塚秀和
Title: POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND LITHIUM ION SECONDARY BATTERY
Abstract:
Disclosed is a positive electrode active material for lithium ion secondary batteries, which contains lithium complex oxide particles that are composed of a layered compound having a hexagonal crystal structure containing nickel, manganese and cobalt. The positive electrode active material for lithium ion secondary batteries has the maximum peak for the range of 2θ = 44-45˚ within the range of 2θ = 44.4-45˚ in the powder X-ray diffraction pattern as obtained by the measurement at 25˚C using a Cu-Kα ray. Also disclosed is a lithium ion secondary battery which comprises: a positive electrode that contains a positive electrode active material capable of absorbing and desorbing lithium ions; a negative electrode that contains a negative electrode active material capable of absorbing and desorbing lithium ions; a separator and a nonaqueous electrolyte solution. The lithium ion secondary battery is characterized in that the positive electrode active material is composed of the above-described positive electrode active material for lithium ion secondary batteries.