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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 12002958 B1

PDFFull Text
Date of Patent:
Jun. 04, 2024

Filed:

May. 28, 2021

Composite particles, negative electrode active material, and lithium-ion secondary battery

Applicant:

Showa Denko K. K., Tokyo, JP;

Inventors:

Naoto Kawaguchi, Tokyo, JP;

Yuji Ito, Tokyo, JP;

Masato Fujita, Tokyo, JP;

Hirofumi Inoue, Tokyo, JP;

Assignee:

Resonac Corporation, Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Khanh T Nguyen

Int. Cl.
CPC ...
H01M 4/587 (2010.01); C01B 32/318 (2017.01); C01B 32/342 (2017.01); C01B 32/372 (2017.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/587 (2013.01); C01B 32/318 (2017.08); C01B 32/342 (2017.08); C01B 32/372 (2017.08); H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); C01P 2002/02 (2013.01); C01P 2002/72 (2013.01); C01P 2002/74 (2013.01); C01P 2002/82 (2013.01); C01P 2004/61 (2013.01); C01P 2004/80 (2013.01); C01P 2006/10 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01);
Abstract

The present invention relates to composite particles containing silicon and carbon, wherein a domain size region of vacancies of 2 nm or less is 44% by volume or more and 70% by volume or less when volume distribution information of domain sizes obtained by fitting a small-angle X-ray scattering spectrum of the composite particles with a spherical model in a carbon-vacancy binary system is accumulated in ascending order, and a true density calculated by dry density measurement by a constant volume expansion method using helium gas is 1.80 g/cmor more and 2.20 g/cmor less.

Find Patent Forward Citations

Kawaguchi, Naoto. (2024). Composite particles, negative electrode active material, and lithium-ion secondary battery (U.S. Patent No. 12002958). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12002958

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

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