CARBON MATERIAL FOR NEGATIVE ELECTRODE OF NONAQUEOUS SOLVENT SECONDARY BATTERY, ITS MANUFACTURING METHOD AND SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a carbon material for a negative electrode of a nonaqueous solvent secondary battery having a high discharging capacity an exceedingly small irreversible capacity in a first cycle and small degradation in performance even if the carbon material is preserved it the air.

SOLUTION: The object carbon material for the negative electrode of the nonaqueous solvent secondary battery can be manufactured by using graphitization-resistant carbon of which the surface has adjusted narrow hole openings diameters in a manner that nitrogen adsorption does not occur substantially at room temperature. It is especially preferable for the graphitization- resistant carbon to be able to perform nitrogen adsorption at room temperature and adjust the diameters by depositing pyrolysis carbon on the surface of the graphitization-resistant carbon having narrow holes which do not substantially generate adsorption of solvent in a liquid electrolyte. Furthermore, it is preferable for the graphitization-resistant carbon to use carbon which is obtained by firing a gel compound which is created by heating furfural in the presence of an acid catalyst at a temperature not less than 1,000°C.

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