Non-aqueous electrolyte secondary cell using carbonaceous materi

Details Non-aqueous electrolyte secondary cell using carbonaceous materi Non-aqueous electrolyte secondary cell using carbonaceous materi

1997-03-31

1999-08-03

Maples, John S.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

4292313, 4292318, 429324, H01M 436

Patent

active

059323736

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:
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patent: 4725422 (1988-02-01), Miyabayashi et al.
patent: 4876077 (1989-10-01), Murakami
patent: 5667917 (1997-09-01), Nagamine et al.
Patent Abstracts of Japan, vol. 013, No. 002 (E-700), Jan. 6, 1989, & JP-A-63 213267 (Asahi Glass Co Ltd), Sep. 6, 1988.
Patent Abstracts of Japan, vol. 95, No. 010 & JP-A-07 254412 (Mitsubishi Gas Chem Co Inc), Oct. 3, 1995.

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