Title:
【発明の名称】非水電解液二次電池
Document Type and Number:
Japanese Patent JP3068712
Kind Code:
B2
Abstract:
PURPOSE:To keep the discharge potential high and flat and prevent the sudden voltage reduction and a trouble caused by it by using a material mixed with another carbon material capable of storing or releasing a preset quantity of lithium into graphite for a carbon material. CONSTITUTION:A mixture of natural or artificial graphite and another carbon material capable of storing or releasing lithium at 5-30vol.% against graphite is used for a carbon material in a nonaqueous electrolyte secondary battery using the carbon material for a negative electrode. The vol.% is defined as B/AX100, where A is the undoped volume obtained when lithium is doped into the carbon material made of natural or artificial graphite at a certain current density with counter electrodes made of a lithium metal used until the inter-terminal voltage is made 0v then lithium is released until 1.0v is attained, and B is the undoped volume obtained after the similar action for another carbon material capable of storing and releasing lithium. The discharge voltage is kept high and flat, and the sudden voltage reduction can be prevented.
Inventors:
Takashi Suzuki
Kohei Yamamoto
Yoshihisa Hino
Yoshiro Harada
Shutetsu Nagura
Kohei Yamamoto
Yoshihisa Hino
Yoshiro Harada
Shutetsu Nagura
Application Number:
JP19396692A
Publication Date:
July 24, 2000
Filing Date:
July 21, 1992
Export Citation:
Assignee:
Fuji Electric Chemical Co., Ltd.
International Classes:
H01M4/02; C01B31/02; C01B31/04; H01M4/36; H01M4/587; H01M10/05; (IPC1-7): H01M4/02; H01M4/58; H01M10/40
Domestic Patent References:
| JP5290844A | ||||
| JP1311565A | ||||
| JP3129664A |
Attorney, Agent or Firm:
Kensuke Isshiki (2 outside)