CARBONACEOUS MATERIAL FOR SECONDARY-BATTERY ELECTRODE AND PRODUCTION THEREOF

摘要

PURPOSE:To produce a carbonaceous material for a secondary-battery electrode capable of forming a nonaqueous-solvent secondary battery having a large charge and discharge capacity, enhanced in active material utilization factor and excellent in charge and discharge cycle characteristics. CONSTITUTION:A petroleum or coal tar or pitch is cross-linked and then carbonized at >=800 deg.C in vacuum or in an inert gas atmosphere to obtain the carbonaceous material. The average layer-to-layer spacing d102 of the (002) face of the material obtained by X-ray diffraction is controlled to 0.340-0.375nm and the size Lc(002) to <=15nm, and the optically anisotropic structure observed by a polarization microscope exhibits a fine mosaic structure.