Preparation of NiMn2O4-NiMnO3@MoS2 Nano-composites with Enhanced Electrochemical Performances for Lithium-ion Batteries

With the technological development in rechargeable lithium-ion batteries (LIBs), there have been a requirement for advanced anodes to complete the demand of energy storage devices.Among the developed anode, Mixed Transition Metal Oxides (MTMOs) are one of the evolving categories.MTMOs provide a synergistic effect due to the presence of multiple elements which enhance the electrochemical performance.Similarly, 2D MoS 2 have been an emerging anode for Lithiumion Batteries.Therefore, in this work, the preparation of NiMn 2 O 4 -NiMnO 3 @MoS 2 (NMO-MoS 2 ) nano-composites have been attempted.Structural, microstructural and other physicochemical characterization have been investigated by X-ray diffraction, Scanning Electron Microscopy.Electrochemical characterizations also analyzed via Cyclic Voltammetry, Electrochemical Impedance Spectroscopy, and Galvanostatic Charge-Discharge analysis.In the MoS 2 type of composite, the layered structure of MoS 2 provides intercalation of lithium ions without any major volume expansion of NiMn 2 O 4 -NiMnO 3 (NMO) material.Furthermore, NMO nanoparticles occupy the spaces between the MoS 2 nanosheets making both faces accessible to electrolyte penetration.The resulting composite material displayed a stable cyclic voltammogram profile and discharge capacity of 361.54 mAhg -1 even after 200 cycles at the current density of 500mA g -1 .