Study on the Synthesis of Mn3O4 Nanooctahedrons and Their Performance for Lithium Ion Batteries

Abstract

Among the transition metal oxides, the Mn3O4 nanostructure possesses high theoretical specific capacity and lower operating voltage. However, the low electrical conductivity of Mn3O4 decreases its specific capacity and restricts its application in the energy conversion and energy storage. In this work, well-shaped, octahedron-like Mn3O4 nanocrystals were prepared by one-step hydrothermal reduction method. Field emission scanning electron microscope, energy dispersive spectrometer, X-ray diffractometer, X-ray photoelectron spectrometer, high resolution transmission electron microscopy, and Fourier transformation infrared spectrometer were applied to characterize the morphology, the structure, and the composition of formed product. The growth mechanism of Mn3O4 nano-octahedron was studied. Cyclic voltammograms, galvanostatic charge–discharge, electrochemical impedance spectroscopy, and rate performance were used to study the electrochemical properties of obtained samples. The experimental results indicate that the component of initial reactants can influence the morphology and composition of the formed manganese oxide. At the current density of 1.0 A g−1, the discharge specific capacity of as-prepared Mn3O4 nano-octahedrons maintains at about 450 mAh g−1 after 300 cycles. This work proves that the formed Mn3O4 nano-octahedrons possess an excellent reversibility and display promising electrochemical properties for the preparation of lithium-ion batteries.

A Bio-Inspired Nanotubular Na2MoO4/TiO2 Composite as a High-Performance Anodic Material for Lithium-Ion Batteries

“…Unfortunately, the theoretical capacity of the graphitic carbon (372 mA g −1 ) is rather low to satisfy the impending need of high energy densities [ 5 ]. Therefore, immense efforts have been paid on the investigation of the high-performance anodic materials, especially the transition metal oxides, such as NiO [ 6 , 7 ], MnO [ 8 , 9 ], Mn 3 O 4 [ 10 ], Fe 3 O 4 [ 11 , 12 , 13 ], Fe 2 O 3 [ 14 ], SnO 2 [ 15 ], and V 2 O 3 [ 16 ], etc. The metal oxides are outstanding electrode material candidates for lithium storage on account of their excellent electronic conductivities, larger theoretical capacities, as well as favorable diffusion abilities of lithium ions [ 17 ].…”

3D printed interdigitated supercapacitor using reduced graphene oxide-MnOx/Mn3O4 based electrodes

“…Hereon, the vibration bands around 595, 445 and 481 cm −1 are attributed to the stretching of the Mn–O bonds in Mn 3 O 4 NPs and MnO x /Mn 3 O 4 –rGO HNCs. 29,30 The presence of the Mn–O stretching vibration on the HNCs suggests the successful integration of the MnO x /Mn 3 O 4 with the rGO. These FT-IR results also advocate that the MnO x /Mn 3 O 4 nanostructured materials are embedded within the rGo nanosheets.…”

“…In addition, the data is used to estimate the wt% of the electroactive component. 29,30 The presence of the Mn-O stretching vibration on the HNCs suggests the successful integration of the MnO x / Mn 3 O 4 with the rGO. These FT-IR results also advocate that the MnO x /Mn 3 O 4 nanostructured materials are embedded within the rGo nanosheets.…”

Construction of Cu2+-doped MnCO3 micro-rhombohedrons and micro-olives as promising anode materials for high performance lithium-ion batteries

“…The decrease in discharge capacity was mainly from the formation of Li 2 O and a solid electrolyte interphase (SEI) layer, and the electrolyte decomposition during the first lithium intercalation process. 22 Moreover, the high initial discharge capacity is generally ascribed to the pseudocapacitive behaviour of transition metal-based materials. 7 The cycle stabilities of the MnCO 3 electrodes for 1000 cycles were measured at 0.5 A g −1 (Fig.…”