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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 11127952 B1

PDFFull Text
Expired
Date of Patent:
Sep. 21, 2021

Filed:

Jun. 24, 2019

Core-shell structure and production method therefof, composition for negative electrode using the core-shell structure as negative electrode active material, negative electrode and secondary battery

Applicants:

Jnc Corporation, Tokyo, JP;

Jnc Petrochemical Corporation, Tokyo, JP;

Inventors:

Yoshihito Takano, Chiba, JP;

Masakazu Kondo, Chiba, JP;

Hirotsuna Yamada, Chiba, JP;

Assignees:

JNC CORPORATION, Tokyo, JP;

JNC PETROCHEMICAL CORPORATION, Tokyo, JP;

Attorney:

JCIPRNET

Primary Examiner:

Matthew J Merkling

Int. Cl.
CPC ...
H01M 4/583 (2010.01); H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/583 (2013.01); H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01);
Abstract

A material for a negative electrode active material having capability of achieving excellent cycle performance while maintaining satisfactory initial efficiency (initial capacity), a production method for the material, a composition for a negative electrode, using the material, a negative electrode, and a secondary battery. A core-shell structure that includes the following components (A) and (B), and satisfies the following conditions (i) and (ii): (A): a core containing at least Si (silicon), O (oxygen) and C (carbon) as a constituent element, and containing crystalline carbon and non-crystalline carbon as a constituent; and (B): a shell encapsulating the core, and including a SiOC structure having a graphene layer, and (i): having an atomic composition represented by formula SiOC(0.5<x<1.8, 1.0<y<5.0), and (ii): having a predetermined value of less than 1.0×10Ω·cm in specific resistance determined by powder resistance measurement.

Find Patent Forward Citations

Takano, Yoshihito. (2021). Core-shell structure and production method therefof, composition for negative electrode using the core-shell structure as negative electrode active material, negative electrode and secondary battery (U.S. Patent No. 11127952). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11127952

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

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