Synthesis and characterization of multidoped lithium manganese oxide spinel LiCo 0.02La 0.01Mn 1.97O 3.98Cl 0.02

Abstract

Multidoped spinel LiCo 0.02La 0.01Mn 1.97O 3.98Cl 0.02 was synthesized by solid-state method. The structure and electrochemical performance were characterized by XRD, ESEM, particle size distribution analysis, specific surface area testing, galvanostatic cycling and electrochemical impedance spectroscopy. The XRD analysis shows that the sample exhibits pure spinel phase. The substitution of Co, La for Mn and Cl for O in the LiMn 2O 4 stabilizes the structural integrity of the spinel host, which in turn increases the electrochemical cycleability. The electrochemical experiments confirm that the capacity of the LiCo 0.02La 0.01Mn 1.97O 3.98Cl 0.02 electrode maintains 90.6% of the initial capacity at 180th cycle.