100 parts by weight of a carbon material having irreversible capacity and
20 to 150 parts by weight of a lithium-containing complex nitride
represented by the general formula Li.sub.3-X M.sub.X N wherein M is at
least one selected from the group consisting of Co, Ni, Mn and Cu, and
wherein 0.2.ltoreq.X.ltoreq.0.8, are included in a negative electrode
thereby to compensate for the irreversible capacity of the carbon material
by the above-described nitride. This enables the maximum utilization of
large capacity possessed by an amorphous carbon or low crystalline carbon,
thereby making it possible to provide a non-aqueous electrolyte secondary
battery having high capacity and excellent cycle reversibility.
