NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, METHOD FOR PRODUCING SAME, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES USING SAME, AND LITHIUM ION SECONDARY BATTERY

摘要

A negative electrode material for lithium ion secondary batteries, which is characterized by being composed of spherical composite bodies that are formed of flake graphite particles, baked carbon and metal particles that can be alloyed with lithium. This negative electrode material for lithium ion secondary batteries is also characterized in that: the composite bodies have pores inside; the flake graphite particles are not parallel to each other inside the composite bodies, but are concentrically oriented in the surfaces of the composite bodies; and the metal particles are dispersed in/on the composite particles.