非水電解質二次電池用正極活物質の製造方法

Title:

非水電解質二次電池用正極活物質の製造方法

Document Type and Number:

Japanese Patent JP5419454

Kind Code:

B2

Abstract:

This invention provides a process for producing, in an inexpensive and highly efficient manner, a lithium-containing composite oxide suitable for a positive electrode active material for a rechargeable battery with a nonaqueous electrolyte, which has a high electrode density, a high discharge capacitance, and excellent other various properties such as safety, rate properties, and charge-discharge cycle properties, and a nonaqueous lithium ion rechargeable battery comprising a lithium-containing composite oxide produced by the production process, and an inexpensive process for producing a granulated powder suitable as a raw material for the positive electrode active material. In the production process, a mixed powder comprising at least a lithium source and an N element source is fired under an oxygen-containing atmosphere at 750 to 1100ºC to produce a lithium-containing composite oxide represented by general formula Li_pN_xM_yO_zF_a, wherein N represents at least one element selected from the group consisting of Ni, Co, and Mn, ; M represents at least one element selected from the group consisting of transition metal elements other than Ni, Co, and Mn, Al, Sn, and alkaline earth metal elements; 0.9 = p = 1.3; 0.92 = x = 2; 0 = y = 0.05; 1.9 = z = 4.1; and 0 = a < 0.05. The production process is characterized in that the N element source is a granulated powder produced by preparing a slurry containing at least an N element-containing compound powder (1) having an average particle diameter of 1 to 15 µm and an N element-containing compound powder (2) having an average particle diameter smaller than the N element-containing compound powder (1) and not more than 4 µm is dried and granulated.

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Inventors:

Koji Tatsumi
Nagura Courage
Kazuya Hiratsuka

Application Number:

JP2008532258A

Publication Date:

February 19, 2014

Filing Date:

March 14, 2008

Export Citation:

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Assignee:

AGC Seimi Chemical Co., Ltd.

International Classes:

H01M4/525; C01G51/00; H01M4/48; H01M4/485; H01M4/50; H01M4/505; H01M4/52; H01M10/0525; H01M10/36

Domestic Patent References:

JP2001354428A	2001-12-25
JPH10279316A	1998-10-20
JP2006298699A	2006-11-02
JP2007302504A	2007-11-22
JP2001354428A	2001-12-25
JPH10279316A	1998-10-20

Foreign References:

WO2004023583A1	2004-03-18
WO2004023583A1	2004-03-18

Attorney, Agent or Firm:

Kenji Izumina
Toshiharu Ogawa
Ryozo Yamamoto

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