Electrode material for lithium secondary battery and lithium secondary battery

Abstract

The present invention provides a negative-electrode material for a lithium secondary battery which has a very low resistance, allows the lithium secondary battery to be charged and discharged (high output) at a high current and have a high capacity, and achieve a cycle life to such an extent that the lithium secondary battery can be mounted on a vehicle. The electrode material is composed of (a) at least one active substance () selected from among a metal oxide containing metal therein and an alloy material each of which is coated with a carbon material and has a graphene phase or an amorphous phase () on at least a surface thereof, (b) a graphite-based carbon material () having the graphene phase or the amorphous phase on at least a surface thereof; and (c) carbon material () other than the graphite-based carbon material and having the graphene phase or the amorphous phase on at least a surface thereof. The active substance (), the graphite-based carbon material (), and the carbon material () other than the graphite-based carbon material fuse the graphene phase or the amorphous phase () thereof together and bond them to each other to form a composite active substance () including composed of the active substance including one active substance selected from among the metal oxide containing the metal and the alloy material.