NEGATIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY AND MANUFACTURE THEREOF, AND THE LITHIUM SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a negative electrode material for realizing a lithium secondary battery, having a high discharge capacity and a high speed charge and discharge characteristic, while restricting the decomposition of the electrolyte solvent, and provide a lithium secondary battery usi...

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Hauptverfasser:	IWANAGA KATSUSUKE, YASUMOTO YOSHINORI, HARA YOICHIRO, UMENO TATSUO, HIRUTA TAKASHI, MATSUNAGA OSAMU, TSUNAWAKE TADANORI, FUKUDA KENJI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOUNDS THEREOF DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a negative electrode material for realizing a lithium secondary battery, having a high discharge capacity and a high speed charge and discharge characteristic, while restricting the decomposition of the electrolyte solvent, and provide a lithium secondary battery using this negative electrode material. SOLUTION: In this method, mixture gas, composed of the organic material and the inert gas and including the organic material at 2-50% of mole concentration is used, and chemical deposition is performed to the graphite grains in a fluidized bed reaction furnace at 900-1,200 deg.C. A negative electrode material for lithium secondary battery, formed of the graphite grains and a crystalline carbon layer for coating the whole surface of the graphite grains, of which the whole surface is arranged in parallel with a carbon 110 face of the carbon layer, is thereby formed.