Modified li-Mg-Ni composite oxides and manufacturing method, Li secondary battery and positive electrode active material

A composite oxide and lithium secondary battery technology, which is applied in secondary batteries, active material electrodes, nickel compounds, etc., can solve the problems of large manganese ion dissolution and discharge capacity, which is only a fraction of the theoretical amount, etc. Achieve excellent cycle characteristics and coulombic efficiency, and inhibit the effect of stripping
CN1725534AActive Publication Date: 2006-01-25NIPPON CHECMICAL IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NIPPON CHECMICAL IND CO LTD
Publication Date
2006-01-25

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Abstract

The present invention provides a modified lithium manganese nickel-based multiple oxide useful as a positive electrode active material of a lithium secondary battery, its production method, a lithium secondary battery positive electrode active material and a lithium secondary battery excellent in cycle characteristics and coulomb efficiencies.This modified lithium manganese nickel-based multiple oxide is characterized in that the surface of a lithium manganese nickel-based multiple oxide expressed by formula (1): LixMn1.5Ni0.5O4-w(0 H01M 4 / 58 H01M 4 / 48 H01M 4 / 04 C01D 15 / 00 C01G 1 / 02 C01G 45 / 00 C01G 53 / 00 H01M 10 / 40 4 19 2 2005 / 7 / 22 1725534 2006 / 1 / 25 100499222 2009 / 6 / 10 2009 / 6 / 10 2009 / 6 / 10 Nippon Chemical Industry Co., Ltd. Japan Ota Yokuni Komekawa Fumihiro long chun di wanjie 11322 Japan 2004 / 7 / 22 2004-213943
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Description

technical field

[0001] The present invention relates to a modified lithium-manganese-nickel-based composite oxide useful as a positive electrode active material for a lithium secondary battery, a method for producing the same, a positive electrode active material for a lithium secondary battery, and a lithium secondary battery excellent in cycle characteristics and Coulombic efficiency. Background technique

[0002] The present applicant previously proposed a method for producing a lithium-manganese composite oxide useful as a positive electrode active material for a lithium secondary battery (see Patent Documents 1 and 2). The lithium-manganese composite oxide produced according to this production method has the following characteristics: the particle size distribution is narrow and the fluidity is high, it is used as a positive electrode active material of a lithium secondary battery, the initial discharge capacity is high, and the capacity retention rate of the discharge c...

Claims

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