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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8821766 B1

PDFFull Text
Date of Patent:
Sep. 02, 2014

Filed:

Mar. 07, 2013

Lithium manganate for non-aqueous electrolyte secondary battery, process for producing the same, and non-aqueous electrolyte secondary battery

Applicant:

Toda Kogyo Corporation, Otake, JP;

Inventors:

Masayuki Uegami, Yamaguchi-ken, JP;

Akihisa Kajiyama, Yamaguchi-ken, JP;

Kazutoshi Ishizaki, Yamaguchi-ken, JP;

Hideaki Sadamura, Yamaguchi-ken, JP;

Assignee:

Toda Kogyo Corporation, Otake-shi, Hiroshima-ken, JP;

Attorney:

Nixon & Vanderhye, P.C.

Primary Examiner:

Harold Pyon

Assistant Examiner:

Tanisha Diggs

Int. Cl.
CPC ...
H01B 1/02 (2006.01); H01M 4/13 (2010.01); H01M 4/50 (2010.01); H01M 4/58 (2010.01); C01G 51/04 (2006.01); C01D 1/02 (2006.01); C01G 45/12 (2006.01); C01F 7/00 (2006.01); C01F 11/02 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); C01G 51/00 (2006.01); H01M 4/525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/505 (2013.01); C01P 2006/12 (2013.01); C01P 2002/74 (2013.01); H01M 10/0525 (2013.01); C01P 2004/51 (2013.01); Y02E 60/122 (2013.01); C01P 2006/40 (2013.01); C01P 2004/03 (2013.01); C01G 51/54 (2013.01); C01P 2002/54 (2013.01); C01P 2004/52 (2013.01); C01P 2002/52 (2013.01); C01P 2002/77 (2013.01); H01M 4/525 (2013.01); C01G 45/1242 (2013.01); C01P 2004/61 (2013.01); C01P 2002/72 (2013.01);
Abstract

The present invention aims at providing lithium manganate having a high output and an excellent high-temperature stability. The above aim can be achieved by lithium manganate particles having a primary particle diameter of not less than 1 μm and an average particle diameter (D) of kinetic particles of not less than 1 μm and not more than 10 μm, which are substantially in the form of single crystal particles and have a composition represented by the following chemical formula: LiMnYOin which Y is at least one element selected from the group consisting of Al, Mg and Co; x and y satisfy 0.03≦x≦0.15 and 0.05≦y≦0.20, respectively, wherein the Y element is uniformly dispersed within the respective particles, and an intensity ratio of I(400)/I(111) thereof is not less than 33% and an intensity ratio of I(440)/I(111) thereof is not less than 16%.

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