ZnMn2O4@ZnO Composite as an Anode for Lithium-lon Batteries
Category
Sciences and Technology
Department
Material Science
Student Status
Graduate
Research Advisor
Dr. Ram Gupta
Document Type
Event
Location
Student Center Ballroom
Start Date
10-4-2025 2:00 PM
End Date
10-4-2025 4:00 PM
Description
As the world moves toward a sustainable energy future, the demand for advanced materials with higher energy densities in storage systems is accelerating. Graphite is used as an anode in conventional lithium-ion batteries because it is inexpensive and environmentally benign. However, the low theoretical capacity of the graphite (372 mA h/g) hinders the fabrication of next-generation batteries. In this work, we report the synthesis of ZnMn2O4@ZnO composites using the microwave-assisted solvothermal method and further calcined at 500 oC. The sample prepared could be utilized as an anode for lithium-ion batteries. Thermogravimetric analysis (TGA) confirmed the prepared sample's thermal stability. Phase analysis via X-ray diffraction (XRD) showed the formation of ZnMn2O4@ZnO composite phases. The electrochemical performance of the composite was evaluated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and charge-discharge cycling tests. The ZnMn2O4@ZnO composites electrode exhibits a discharge capacity of 741 mA h/g over 100 cycles at a current density of 0.5 A/g, which is higher than the conventional used graphitic anode. The enhanced electrochemical performance is attributed to the synergistic interaction between ZnMn2O4 and ZnO, which improves both structural integrity and ion transport. These findings highlight the potential of ZnMn2O4@ZnO composites as high-performance and durable anode materials for next-generation lithium-ion batteries.
ZnMn2O4@ZnO Composite as an Anode for Lithium-lon Batteries
Student Center Ballroom
As the world moves toward a sustainable energy future, the demand for advanced materials with higher energy densities in storage systems is accelerating. Graphite is used as an anode in conventional lithium-ion batteries because it is inexpensive and environmentally benign. However, the low theoretical capacity of the graphite (372 mA h/g) hinders the fabrication of next-generation batteries. In this work, we report the synthesis of ZnMn2O4@ZnO composites using the microwave-assisted solvothermal method and further calcined at 500 oC. The sample prepared could be utilized as an anode for lithium-ion batteries. Thermogravimetric analysis (TGA) confirmed the prepared sample's thermal stability. Phase analysis via X-ray diffraction (XRD) showed the formation of ZnMn2O4@ZnO composite phases. The electrochemical performance of the composite was evaluated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and charge-discharge cycling tests. The ZnMn2O4@ZnO composites electrode exhibits a discharge capacity of 741 mA h/g over 100 cycles at a current density of 0.5 A/g, which is higher than the conventional used graphitic anode. The enhanced electrochemical performance is attributed to the synergistic interaction between ZnMn2O4 and ZnO, which improves both structural integrity and ion transport. These findings highlight the potential of ZnMn2O4@ZnO composites as high-performance and durable anode materials for next-generation lithium-ion batteries.
