Farid P Badway

US Patent:

20130295446, Nov 7, 2013

Filed:

May 2, 2013

Appl. No.:

13/875654

Inventors:

- Tokyo, JP
Nobuaki ISHII - Tokyo, JP
Masataka TAKEUCHI - Tokyo, JP
Mohit JAIN - East Brunswick NJ, US
Nader M. HAGH - Franklin Park NJ, US
Farid BADWAY - Old Bridge NJ, US
Krista MARTIN - Edgewater NJ, US

Assignee:

SHOWA DENKO K.K. - Tokyo

International Classification:

H01M 4/133
H01M 10/0569
H01M 10/0525
H01M 4/64

US Classification:

429188, 4292318, 429211, 2521821

Abstract:

A negative electrode material for a lithium ion battery, in which a fine particle (A) containing an element selected from Si, Sn, Ge and In and a carbon particle (B) obtained by heat-treating a petroleum-based coke and/or a coal-based coke at a temperature of 2,500 C. or more are connected through a chemical bond such as urethane bond, urea bond, siloxane bond and ester bond. Also disclosed are a negative electrode sheet obtained by coating a current collector with a paste containing the negative electrode material, a binder and a solvent, and then drying and pressure-forming the paste; and a lithium ion battery incorporating the negative electrode sheet.