| 摘要 |
PURPOSE: To provide a negative electrode for a secondary battery which is large in charge and discharge capacity and besides which enables a user to set the current density at charge and discharge highly. CONSTITUTION: This negative electrode for a lithium secondary battery is one which contains milled mesophase pitch graphite fibers, and the milled graphite fibers of which have apertures in a graphite layer as the gates for lithium ions all over the periphery and the upper and lower end faces. A great part of the apertures in the graphite layer existing inside the milled graphite fibers are conductive electrically with the surfaces of the milled graphite fibers, and the quantity of insertable lithium ions is equivalent to 75% or over of the logical quantity of graphite. Next, the graphite fibers are spun with a mesophase pitch of poise viscosity of 5-50 into mesophase fibers, and next those are made infusible or milled after temporary heat treatment, and next graphitized milled graphite fibers and a binder are mixed, and it is molded in the shape of a negative electrode, thus a negative electrode for a lithium secondary battery is manufactured. |
