Synthesis and electrochemical characteristics of spinel LiMn2O4 via a precipitation spray-drying process

Spinel LiMn2O4 has been successfully synthesized using a precipitation spray-drying process. After the precursor was annealed at 750 °C for 10 h, the synthesized material was well-crystallized spinel particle, and exhibited uniform particle size distribution. From cyclic voltammetry results, there is an anomalous redox peaks (3.75/3.26 V). In the charge/discharge potential (versus Li) ranging from 3.2 to 4.5 V, it delivered a high initial discharge capacity of 123 mAh/g at a discharge rate of 60 μA/cm2 (1/4 C rate). At a high discharge rate of 2.4 mA/cm2 (10 C rate), the obtainable reversible capacity was 79 mAh/g. The simple procedure of precipitation spray-drying process is time and energy saving, and thus is promising for commercial application.