Process for preparing carbonaceous material for negative electro

Details Process for preparing carbonaceous material for negative electro Process for preparing carbonaceous material for negative electro

1996-05-15

1997-09-16

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

423448, 429218, H01M 1040, C01B 3102

Patent

active

056679149

ABSTRACT:
A material for a negative electrode of a cell, which is prepared according to a process of the present invention, can provides a cell having a high true specific gravity, a high charging capacity and an excellent cycle characteristic. The process of the present invention comprises the steps of carbonizing an organic compound to form a carbide thereof, pulverizing said carbide to form a powder having an average particle size of 10 .mu.m to 2 mm, and sintering said powder of the carbide at a temperature of 2,000.degree. C. or higher to produce a graphite. In addition, in accordance with the present invention, there is also provided non-aqueous electrolyte secondary cell comprising a negative electrode, which is prepared by carbonizing an organic compound to form a carbide thereof, pulverizing the carbide to form a powder having an average particle size of 10 .mu.m to 2 mm, and sintering the powder of the carbide at a temperature of 2,000.degree. C. to form a graphite.

REFERENCES:
patent: 3787541 (1974-01-01), Grindstaff et al.
patent: 4055628 (1977-10-01), McCarroll et al.
patent: 4725422 (1988-02-01), Miyabayashi et al.
patent: 4876077 (1989-10-01), Murakami

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