Indian Journal of Engineering & Materials Sciences

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


Affiliations
1 Department of Applied Physics, Delhi Technological University, New Delhi 110 042, India
 

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 MoS2 have been an emerging anode for Lithium-ion Batteries. Therefore, in this work, the preparation of NiMn2O4-NiMnO3@MoS2(NMO-MoS2) 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 MoS2 type of composite, the layered structure of MoS2 provides intercalation of lithium ions without any major volume expansion of NiMn2O4-NiMnO3 (NMO) material. Furthermore, NMO nanoparticles occupy the spaces between the MoS2 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.

Keywords

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

Abstract Views: 66  |  PDF Views: 47

Authors

Anchali Jain
Department of Applied Physics, Delhi Technological University, New Delhi 110 042, India
Amrish.K. Panwar
Department of Applied Physics, Delhi Technological University, New Delhi 110 042, India
Pawan K. Tyagi
Department of Applied Physics, Delhi Technological University, New Delhi 110 042, India

Abstract


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 MoS2 have been an emerging anode for Lithium-ion Batteries. Therefore, in this work, the preparation of NiMn2O4-NiMnO3@MoS2(NMO-MoS2) 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 MoS2 type of composite, the layered structure of MoS2 provides intercalation of lithium ions without any major volume expansion of NiMn2O4-NiMnO3 (NMO) material. Furthermore, NMO nanoparticles occupy the spaces between the MoS2 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.

Keywords


Composite, Lithium-ion Batteries, MoS2, NiMn2O4, NiMnO3

References