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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 10535875 B1

PDFFull Text
Date of Patent:
Jan. 14, 2020

Filed:

Oct. 13, 2015

Positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery

Applicants:

Sumitomo Chemical Company, Limited, Tokyo, JP;

Tanaka Chemical Corporation, Fukui-shi, Fukui, JP;

Inventors:

Kenji Takamori, Fukui, JP;

Hiroyuki Kurita, Tsukuba, JP;

Yuichiro Imanari, Fukui, JP;

Daisuke Yamashita, Fukui, JP;

Kimiyasu Nakao, Fukui, JP;

Kyousuke Doumae, Fukui, JP;

Assignees:

SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo, JP;

TANAKA CHEMICAL CORPORATION, Fukui-Shi, Fukui, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Karie O'Neill Apicella

Int. Cl.
CPC ...
H01M 4/525 (2010.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); C01G 53/00 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/525 (2013.01); C01G 53/00 (2013.01); C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/60 (2013.01); C01P 2004/54 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01);
Abstract

A positive electrode active material, which has a crystallite size α/crystallite size β ratio (α/β) of 1 to 1.75 or less, wherein the crystallite size α is within a peak region of 2θ=18.7±1° and the crystallite size β is within a peak region of 2θ=44.6±1°, each determined by a powder X-ray diffraction measurement using Cu-Kα ray, and has a composition represented by formula (I) below:Li[Li(NiCoMnM)]O  (I)wherein 0≤x≤0.2, 0.3<a<0.7, 0<b<0.4, 0<c<0.4, 0≤d<0.1, a+b+c+d=1, and M is at least one metal selected from the group consisting of Fe, Cr, Ti, Mg, Al and Zr.

Find Patent Forward Citations

Takamori, Kenji. (2020). Positive electrode active material for lithium secondary battery, positive electrode for lithium secondary battery, and lithium secondary battery (U.S. Patent No. 10535875). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10535875

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