Electrochemical properties of nanocrystalline LiCuxMn2−xO4 (x = 0.2-0.6) particles prepared by ultrasonic spray pyrolysis method

► Production of Cu substituted spinel LiMn2O4 cathode particles by spray pyrolysis. ► Effects of Cu amount to the spinel LiMn2O4 structure. ► Second spinel phase formation by increasing Cu substitute. ► Increasing pores morphology by Cu substitute. ► Electrochemical performance of LiCuxMn2−xO4 (x = 0.2, 0.4 and 0.6).