As cathode materials of LiMn2O4-based lithium-ion secondary batteries, Li(Mn1-$delta$M$delta$)2O4 (M=Ni and Co, $delta$=0, 0.05, 0.1 and 0.2) materials which Co and Ni are substituted for Mn, were syntehsized by the solid state reaction at 80$0^{circ}C$ for 48 hours. No second phases were formed in Li(Mn1-$delta$M$delta$)2O4 system with substitution of Co. However, substitution of Ni caued to form a second phase of NiO when its composition exceeded over 0.2 of $delta$ in Li(Mn1-$delta$M$delta$)2O4. As the results of charging-discharging test, the maximum capacity of Li(Mn1-$delta$M$delta$)2O4 appeared in $delta$=0.1 for both Co and Ni. Also, Li(Mn1-$delta$M$delta$)2O4 electrode showed higher capacity and better cycle performance than LiMn2O4.