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.:
Date of Patent:
Jun. 16, 2026
Filed:
Dec. 03, 2021
Prime Planet Energy & Solutions, Inc., Tokyo, JP;
Shinsuke Matsuhara, Miyoshi, JP;
PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo, JP;
Abstract
The present disclosure provides a negative electrode active material that can realize excellent low temperature characteristics. The negative electrode active material for a lithium ion secondary battery disclosed herein includes a carbon material that is able to reversibly occlude and release lithium ions and a carbon coating layer that is formed on a surface of the carbon material, and the carbon coating layer contains carbon atoms and phosphorus atoms. In addition, in the carbon coating layer, when a peak of a P2p spectrum measured by X-ray photoelectron spectroscopy (XPS) is subjected to waveform separation, there is a peak at a position at which a binding energy is 131 eV, and an intensity ratio (I/I) of a peak intensity Iat 1,580 cmto a peak intensity Iat 1,360 cmin a Raman spectrum is 0.4 or more and 0.7 or less.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile