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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 10403893 B1

PDFFull Text
Date of Patent:
Sep. 03, 2019

Filed:

Aug. 21, 2014

Positive electrode material for lithium secondary battery

Applicants:

Hydro-quebec, Montreal, Quebec, CA;

Sei Corp., Tsu, Mie, JP;

Inventors:

Takehiko Sawai, Tsu, JP;

Shinji Saito, Tsu, JP;

Kazunori Urao, Tsu, JP;

Kazuma Hanai, Tsu, JP;

Karim Zaghib, Longueuil, CA;

Abdelbast Guerfi, Brossard, CA;

Martin Dontigny, Varennes, CA;

Assignees:

HYDRO-QUEBEC, Montreal, Quebec, CA;

SEI CORPORATION, Tsu, Mie Pref., JP;

Attorney:

Buchanan Ingersoll & Rooney P.C.

Primary Examiner:

Carmen V Lyles-Irving

Int. Cl.
CPC ...
H01M 4/58 (2010.01); H01M 4/04 (2006.01); H01M 4/136 (2010.01); H01M 4/1391 (2010.01); H01M 4/1397 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/587 (2010.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); C01B 25/45 (2006.01); B60L 50/64 (2019.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/5825 (2013.01); B60L 50/64 (2019.02); C01B 25/45 (2013.01); H01M 4/0402 (2013.01); H01M 4/131 (2013.01); H01M 4/136 (2013.01); H01M 4/1391 (2013.01); H01M 4/1397 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/587 (2013.01); H01M 4/62 (2013.01); H01M 4/625 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); C01P 2004/61 (2013.01); C01P 2004/80 (2013.01); H01M 2004/028 (2013.01); H01M 2220/10 (2013.01); H01M 2220/20 (2013.01); Y02T 10/705 (2013.01); Y02T 10/7011 (2013.01);
Abstract

A positive electrode material is used to produce a positive electrode of a lithium secondary battery, the positive electrode material being a composite lithium material that includes a first lithium compound and a second lithium compound. For instance, the first lithium compound is in the form of particles and comprises at least one compound selected from a layered lithium compound and a spinel-type lithium compound. Preferably, the second lithium compound comprises at least one compound selected from a lithium-containing phosphate compound and a lithium-containing silicate compound. An amorphous carbon material layer and/or graphene-structured carbon material layer is present on the entire surface of the first lithium compound and the second lithium compound. The second lithium compound forms a thin-film layer on part or the entirety of the carbon material layer present on the surface of the first lithium compound particles.

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