Lithium-Sekundärbatterie und Kohlenstoffmaterial dafür

摘要

A lithium secondary battery, comprising: a vessel; a positive electrode containing an active material housed in the vessel; a lithium ion conductive electrolyte in the vessel, and a negative electrode arranged in the vessel containing carbonaceous material spherical particles as active material that absorbs and discharges lithium ions, the carbonaceous material spherical particles containing a graphite-like layered structure part and a turbulence-layered structure part, fine structures of the carbonaceous material spherical particle being arranged in point-orientation. There is also provided a process for making carbonaceous material for a negative electrode of a lithium secondary battery comprising the step of heat-treating for carbonizing a spherical particle or a fibre, the heat-treating step including one of the steps of carbonizing a mesophase small spherical particle or a mesophase pitch fibre in an inert gas or a vacuum at a temperature of more than 1200 DEG C up to 2500 DEG C.