NEGATIVE ELECTRODE MATERIAL FOR NONAQUEOUS SECONDARY BATTERY, ITS MANUFACTURING METHOD, AND SECONDARY BATTERY USING IT

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode material for a nonaqueous secondary battery capable of providing high capacity per mass and per volume in practical doping time and enhancing cycle characteristics, and to provide a method of manufacturing the negative electrode material for the nonaqueous secondary battery with a simple manufacturing method and high yield. SOLUTION: The negative electrode material for the nonaqueous secondary battery is made of polycyclic aromatic hydrocarbon obtained by heat reaction of a raw material containing coal isotropic pitch as a main component, has an atomic ratio of hydrogen/carbon of 0.18-0.25, a specific surface area in a BET process of 0.1-50 m2/g, a real density of 1.45 g/cm3or more, and an average particle size of 10μm or less. The method of manufacturing the negative electrode material for the nonaqueous secondary battery is that the raw material containing the coal isotropic pitch as the main component is heat-reacted without conducting non-fusible treatment to manufacture the polycyclic aromatic hydrocarbon. COPYRIGHT: (C)2005,JPO&NCIPI