Invention Grant
- Patent Title: Negative electrode active material for lithium ion secondary battery
-
Application No.: US13989418Application Date: 2010-11-26
-
Publication No.: US10008712B2Publication Date: 2018-06-26
- Inventor: Hiroshi Onizuka
- Applicant: Hiroshi Onizuka
- Applicant Address: JP Toyota-shi, Aichi
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Toyota-shi, Aichi
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, LLP
- International Application: PCT/JP2010/071177 WO 20101126
- International Announcement: WO2012/070153 WO 20120531
- Main IPC: H01M4/13
- IPC: H01M4/13 ; H01M4/133 ; H01M4/36 ; H01M4/587 ; H01M10/0525

Abstract:
The present invention provides a negative electrode active material which can prevent reduction in battery capacity by suppressing reaction of an electrolyte solution at the surface of the negative electrode active material as well as can reduce resistance resulting from the formation of a film. A negative electrode active material 90 for a lithium ion secondary battery comprises a carbon material 92 capable of reversibly storing and releasing lithium, an amorphous carbon membrane 94 coating the surface of the carbon material and a film 96 containing a phosphate compound and coating the surface of the amorphous carbon membrane.
Public/Granted literature
- US20130244118A1 NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY Public/Granted day:2013-09-19
Information query