Lithium secondary battery and method of manufacturing carbonaceo

Details Lithium secondary battery and method of manufacturing carbonaceo Lithium secondary battery and method of manufacturing carbonaceo

Filed on

1993-06-01

Date issued

1994-08-23

Examiner

Willis, Jr., Prince

Patent Class

Chemistry: electrical current producing apparatus, product, and

SubClass

Current producing cell, elements, subcombinations and...

SubSubClass

Include electrolyte chemically specified and method

Other Related Categories

429197, 429218, 423445R, 423448, H01M 1040

Type

Patent

Status

active

Patent number

053406702

Description

ABSTRACT:
A lithium secondary battery having a high capacity and excellent in charge-discharge efficiency, cycle life, flatness of a discharge voltage, and rapid charge-discharge cycle characteristics is disclosed. This lithium secondary battery includes a positive electrode housed in a case, a negative electrode housed in the case and containing a carbonaceous material which has an exothermic peak at 700.degree. C. or more when measured by a differential thermal analysis and an intensity ratio P.sub.101 /P.sub.100 of a (101) diffraction peak P.sub.101 to a (100) diffraction peak P100 of a graphite structure, obtained by X-ray diffraction analysis, of 0.7 to 2.2, and absorbs and desorbs lithium ions, a separator housed in the case so as to be arranged between the positive and negative electrodes, and a nonaqueous electrolyte contained in the case.

REFERENCES:
patent: 4615959 (1986-10-01), Hayashi et al.
patent: 4980250 (1990-12-01), Takahashi et al.
patent: 5028500 (1991-07-01), Fong et al.
patent: 5079109 (1992-01-01), Takami et al.
patent: 5153082 (1992-10-01), Ogino et al.
patent: 5244757 (1993-09-01), Takami et al.
patent: 5272022 (1993-12-01), Takami et al.

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