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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 10181601 B1

PDFFull Text
Date of Patent:
Jan. 15, 2019

Filed:

Aug. 17, 2017

Lithium manganese phosphate nanoparticles and method for manufacturing same, carbon-coated lithium manganese phosphate nanoparticles, carbon-coated lithium manganese phosphate nanoparticle granulated body, and lithium ion cell

Applicant:

Toray Industries, Inc., Tokyo, JP;

Inventors:

Hironobu Tsuji, Otsu, JP;

Yasuo Kubota, Otsu, JP;

Hiroaki Kawamura, Otsu, JP;

Eiichiro Tamaki, Otsu, JP;

Miyuki Tabayashi, Otsu, JP;

Assignee:

TORAY INDUSTRIES, INC., Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch LLP

Primary Examiner:

James M Erwin

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/505 (2010.01); C01B 25/45 (2006.01); H01M 4/133 (2010.01); H01M 4/136 (2010.01); H01M 4/58 (2010.01); H01M 4/583 (2010.01); H01M 10/0525 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); C01B 25/45 (2013.01); H01M 4/133 (2013.01); H01M 4/136 (2013.01); H01M 4/505 (2013.01); H01M 4/583 (2013.01); H01M 4/587 (2013.01); H01M 4/5825 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); C01P 2002/74 (2013.01); C01P 2004/61 (2013.01); C01P 2004/64 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); Y02T 10/7011 (2013.01);
Abstract

The present invention makes a lithium ion secondary cell exhibit high capacity when lithium manganese phosphate is used as the active material of the lithium ion secondary cell. The present invention is directed to lithium manganese phosphate nanoparticles having a ratio I/Iof the peak intensity at 20° to the peak intensity at 29° obtained by X-ray diffraction of greater than or equal to 0.88 and less than or equal to 1.05, and a crystallite size determined by X-ray diffraction of greater than or equal to 10 nm and less than or equal to 50 nm.

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