We have investigated the Li(3-x)M(x)N (M : Co, Ni, or Cu, x=0.1-0.6) system as an anode material for lithium rechargeable high specific capacity of 760 mA h/g in the 0.0-1.4 V range. This value is more than twice the theoretical capacity of C6Li (372 mA h/g). The capacity of the Li3-xCoxN system depends on the amount of lithium ions removed during the first extraction. These systems are expected to increase substantially the energy density of lithium rechargeable cells.