Synthesis and electrochemical properties of dual doped spinels LiNixAlyMn2−x−yO4 via facile novel chelated sol-gel method as possible cathode material for lithium rechargeable batteries

dQ/dE curves of (a) LiMn2O4 and (b) LiNi0.5Al0.05Mn1.45O4 show two redox peaks delivering high anodic and cathodic peak currents. SEM of LiNi0.5Al0.1Mn1.4O4 exhibits micron-sized spherical grains. TEM of LiNi0.5Mn1.5O4 depicts good agglomerated particles of 50 nm.213