Title:
MANUFACTURE OF CARBON MATERIAL FOR SECONDARY BATTERY NEGATIVE ELECTRODE AND OBTAINED CARBON MATERIAL
Document Type and Number:
Japanese Patent JPH11339798
Kind Code:
A
Abstract:
To provide a manufacturing method of a carbon material for a secondary battery negative electrode having large discharge capacity.
In this method, a negative electrode carbon material is manufactured by graphitizing a mixture of boric compound and mesophase carbon pellets in which a weight ratio of the mesophase carbon to the free carbon is 2-20, or by covering a mixture of a carbonaceous material and boric compound with a packing material of ash content not more than 5%, then by turning on electricity, heating and graphitizing them. The mesophase carbon pellets are preferably obtained by heat-treating coal tar and/or pitch containing the free carbon 0.5-3 wt.%.
Inventors:
SATO NOBUYUKI
HATANO HITOMI
TAKAGI YOSHINORI
TORII TAKAYUKI
YUYA SATOSHI
HATANO HITOMI
TAKAGI YOSHINORI
TORII TAKAYUKI
YUYA SATOSHI
Application Number:
JP14347998A
Publication Date:
December 10, 1999
Filing Date:
May 25, 1998
Export Citation:
Assignee:
KAWASAKI STEEL CO
International Classes:
C04B35/52; C01B31/04; H01M4/587; (IPC1-7): H01M4/58; C01B31/04; C04B35/52; H01M4/02
Attorney, Agent or Firm:
Nobuto Watanabe (1 person outside)
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