Synthesis and characterization of spinel LiMn2O4 prepared by the cyclohexanone hydrothermal method

Abstract

Spinel LiMn₂O₄ particles were successfully synthesized by the cyclohexanone hydrothermal method, in which the spinel LiMn₂O₄ was directly synthesized from the hydrothermal reaction without further sintering at high temperature. X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) showed that the samples were LiMn₂O₄ with spinel morphology. The electrochemical performance showed that the sample with the ratio 2 : 25 had a high initial discharge capacity of 127.9 mA h g⁻¹. Moreover, it exhibited excellent cycling maintaining 94.6% of its initial discharge capacity after 60 charge–discharge cycles.