Process for producing graphite material for negative electrode u

Details Process for producing graphite material for negative electrode u Process for producing graphite material for negative electrode u

1999-02-05

2000-06-20

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Filaments

264 297, 264141, 4234476, 4234478, C01B 3104, D01F 912

Patent

active

060774630

ABSTRACT:
A process for producing graphite materials for a negative electrode used in a lithium secondary battery which process includes the steps of packing carbon materials having an average particle diameter of 5 to 50 .mu.m in a plurality of boxes, placing the boxes in a graphitization furnace, subjecting the graphite materials to graphitization treatment, and thereafter subjecting the resultant graphite materials to uniformization treatment by mixing and agitation. The above process is capable of decreasing the influence on the qualitative variation of graphite materials ascribed to packing operation into boxes for graphitization, to the position of the materials in a graphitization furnace, and to bubbling phenomenon or the like through graphitization treatment, and is also capable of stabilizing the qualities of the resulting graphite materials and increasing the productivity.

REFERENCES:
patent: 4942002 (1990-07-01), Feist
patent: 5300272 (1994-04-01), Simandl et al.
patent: 5951959 (1999-09-01), Nishimura
Patent Abstracts of Japan, vol. 096, No. 007, Jul. 31, 1996, JP 08 083608, Mar. 26, 1996.

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