NEGATIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY CELL, ITS MANUFACTURE METHOD, AND LITHIUM SECONDARY CELL

摘要

The captioned material is composed mainly of carbonaceous particles obtained by crushing pitch carbon fiber. The interplanar spacing d of the carbon particle is 0.338 nm or less. The average particle size is 5 to 200 mu m. The captioned lithium secondary cell uses this negative electrode material. The pitch fiber is burnee at 800 to 2600 DEG C to prepare the carbon fiber, which is then crushed. The crushed carbon fiber thus obtained is again burned at a temperature higher than that of the burning process before the crushing, hence manufacturing the carbon fiber particles having the above-mentioned degree of graphitization and average size.