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:
Oct. 20, 2020
Filed:
Nov. 07, 2018
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Shinsuke Matsuhara, Miyoshi, JP;
Kazuhisa Takeda, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
According to the present invention, there is provided a negative electrode material for a lithium secondary battery, including a negative electrode active material including a carbon material and having an I/Iratio of XPS of 0.2 to 0.74, and a coating portion disposed on a surface of the negative electrode active material. The coating portion has a boron atom and a crosslinking site having a bonding portion of C—O—C and interposed between the boron atom and the negative electrode active material. In an XPS spectrum, when an area of the peak of the 1s electron orbital of the boron atom is denoted by Ab and an area of the peak of the C—O—C bonding portion is denoted by Ac, the ratio Ac/Ab of the peak area Ac to the peak area Ab is 0.11 or more and 0.51 or less.