REFORMED GRAPHITE PARTICLE, PRODUCTION METHOD THEREFOR, AND ELECTRODE MATERIAL FOR SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide reformed graphite particles with a special particle structure which have more improved performance as that of an electrode material for a secondary battery by further improving the spheroidized reformed particles shown in No.1999-263612 in published application by the applicant, to provide a production method therefor, and to provide an electrode material for a secondary battery consisting of the reformed graphite particles obtained thereby. SOLUTION: Raw material particles (x) consisting of flaky graphite particles or the particles obtained by reforming the same particles are mixed with raw material spheroidized particles (y) with a cabbagelike appearance in which graphite cut pieces go toward various directions by microscopic observation in the broken-out section, and they are collided in a flowing state. Thus, the spheroidized particles with a structure where small-sized graphidized particles (a) with a cabbagelike apparance in which graphite cut pieces go toward various directions by microscopic observation in the broken-out section are numerously contained in the internal gaps can be obtained.