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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 11605810 B1

PDFFull Text
Date of Patent:
Mar. 14, 2023

Filed:

Dec. 08, 2021

Method to prepare composite graphite particles for nonaqueous secondary battery negative electrode, active material for nonaqueous secondary battery negative electrode, and nonaqueous secondary battery

Applicant:

Mitsubishi Chemical Corporation, Tokyo, JP;

Inventors:

Akio Ueda, Inashiki-gun, JP;

Satoshi Akasaka, Inashiki-gun, JP;

Nobuyuki Ishiwatari, Inashiki-gun, JP;

Junko Kagimoto, Chiyoda-ku, JP;

Shingo Morokuma, Inashiki-gun, JP;

Assignee:

Mitsubishi Chemical Corporation, Tokyo, JP;

Attorney:

Obion, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Sarah A Slifka

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 10/0525 (2010.01); H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 10/0566 (2010.01);
U.S. Cl.
CPC ...
H01M 4/364 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/38 (2013.01); H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 4/62 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 10/0566 (2013.01); Y02T 10/70 (2013.01);
Abstract

The invention relates to composite graphite particles for a nonaqueous secondary battery negative electrode containing graphite (A) and metal particles (B) capable of alloying with Li, wherein the degree of dispersion of the metal particles (B) in the composite graphite particles is 0.78 or more and the internal void fraction of the composite graphite particles is 3% or more and 40% or less.

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Ueda, Akio. (2023). Method to prepare composite graphite particles for nonaqueous secondary battery negative electrode, active material for nonaqueous secondary battery negative electrode, and nonaqueous secondary battery (U.S. Patent No. 11605810). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11605810

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