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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 12770864 B1

PDFFull Text
Date of Patent:
Oct. 20, 2026

Filed:

May. 26, 2022

Composite particles, negative electrode mixture layer and lithium-ion secondary battery

Applicant:

Group 14 Technologies, Inc., Woodinville, WA (US);

Inventors:

Yuji Ito, Tokyo, JP;

Masato Fujita, Tokyo, JP;

Akihisa Tonegawa, Tokyo, JP;

Takayuki Kurita, Tokyo, JP;

Hirofumi Inoue, Tokyo, JP;

Assignee:

Group14 Technologies, Inc., Woodinville, WA (US);

Attorney:

Seed Intellectual Property Law Group LLP

Primary Examiner:

Matthew J Merkling

Int. Cl.
CPC ...
H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01);
Abstract

One embodiment of the present invention is composite particles containing silicon and carbon, which are characterized as follows. When the cross-sectional diameter and the silicon content rate of the composite particles are measured by cross-sectional SEM-EDS and composite particles having a cross-sectional diameter of half or less than the number average of the cross-sectional diameter are defined as small diameter composite particles, the proportion of the number of the small diameter composite particles in the number of the composite particles measured is 5% or more and 50% or less, the ratio of the average silicon content rate (% by mass) of particles other than the small diameter composite particles to the average silicon content rate (% by mass) of the small diameter composite particles is 0.90 or less, and the silicon content rate of the entire composite particles is 45% by mass or more.

Find Patent Forward Citations

Ito, Yuji. (2026). Composite particles, negative electrode mixture layer and lithium-ion secondary battery (U.S. Patent No. 12770864). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12770864

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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