Synthesis of MnO2 nanoparticles and its effective utilization as high-performance of supercapacitor

Ashokkumar, K.; Dhanapandian, S.; Suthakaran, S.; Krishnakumar, N.; Anandan, M.

doi:10.1016/j.matpr.2021.09.032

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…For both samples, the characteristic bands at 500–800 cm −1 were observed. The peaks that appeared at 533 and 580 cm −1 in the spectrum of M1-MnO 2 could be related to the Mn–O lattice vibration 33 , 34 . However, the position of the characteristic bands displayed some apparent changes in M2-MnO 2 .…”

Section: Resultsmentioning

confidence: 95%

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Tannic acid-mediated synthesis of flower-like mesoporous MnO2 nanostructures as T1–T2 dual-modal MRI contrast agents and dual-enzyme mimetic agents

Sorouri,

Gholibegloo,

Mortezazadeh

et al. 2023

Sci Rep

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This study introduces a simple method for preparing a new generation of MnO2 nanomaterials (MNMs) using tannic acid as a template. Two shapes of MnO2 NMs, flower-like M1-MnO2 and near-spherical M2-MnO2, were prepared and compared as dual-active nanozymes and contrast agents in magnetic resonance imaging (MRI). Various parameters, including the crystallinity, morphology, magnetic saturation (Ms), surface functionality, surface area, and porosity of the MNMs were investigated. Flower-like M1-MnO2 NMs were biocompatible and exhibited pH-sensitive oxidase and peroxidase mimetic activity, more potent than near-spherical M2-MnO2. Furthermore, the signal intensity and r1 relaxivity strongly depended on the crystallinity, morphology, pore size, and specific surface area of the synthesized MNMs. Our findings suggest that flower-like M1-MnO2 NM with acceptable dual-enzyme mimetic (oxidase-like and peroxidase-like) and T1 MRI contrast activities could be employed as a promising theranostic system for future purposes.

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Section: Resultsmentioning

confidence: 95%

“…These bands could be related to the adsorbed water molecules and the free hydroxyl groups in the structure of MnO 2 NMs. The peaks around 1384 and 731 cm −1 could be attributed to the vibrations of the O–Mn–O bonds in the MnO 2 structure 33 . For both samples, the characteristic bands at 500–800 cm −1 were observed.…”

Section: Resultsmentioning

confidence: 98%

Tannic acid-mediated synthesis of flower-like mesoporous MnO2 nanostructures as T1–T2 dual-modal MRI contrast agents and dual-enzyme mimetic agents

Sorouri,

Gholibegloo,

Mortezazadeh

et al. 2023

Sci Rep

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“…With unique outer valence electrons and special physical and chemical properties, transition metal manganese compounds are one of the high-capacity lithium-ion anode materials that have attracted more attention in recent years [7], among which MnO 2 is viewed as one of the most valuable electrode materials for lithium battery due to its advantages such as simple and diverse preparation methods, low cost and high capacity (theoretical capacity is 1232 mA h g −1 ) [8,9]. However, MnO 2 also has some disadvantages, involving volume change during the repeated process of charge/discharge and poor electrical conductivity, which result in poor performance of rate and inferior stability of cycle [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

MnO2/Carbon Nanofibers Material as High-Performance Anode for Lithium-Ion Batteries

Zhao

et al. 2023

Coatings

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MnO2 has advantages such as the simple and diverse preparation methods, low cost and high theoretical capacity, but its industrial application is affected by its poor conductivity and fast attenuation of cycle performance. In order to improve its conductivity, battery capacity and performance, MnO2/carbon nanofibers (MnO2/CNFs) are obtained by using electrospinning technology, and the electrochemical performance was confirmed by XRD, SEM, TEM. Confirmed by comparison, the 20% MnO2/CNFs exhibit superior and excellent long cycling performance with a reversible capacity of 835 mA h g−1 at 0.1 A g−1 after the 133th cycle and a high initial specific capacity of 1094 mA h g−1 at a current density of 0.1 A g−1. The MnO2/CNFs have notable specific capacities with a coulombic efficiency of 99.5%, which greatly improve the reaction rate. This can also be used as a flexible electrode material because of its good flexibility. Due to the fact that carbon has better electron/ion conductivity, it shows better kinetics.

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Recent advances in porous multimetallic alloy-based anodes for rechargeable alkali metal-ion batteries

Ipadeola,

Abdullah,

Eid

2024

Energy Mater

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The rechargeable alkali metal-ion batteries (RAMIBs) are highly promising candidates for next-generation efficient energy storage devices, owing to their outstanding theoretical specific capacities and extremely low electrochemical potentials. However, RAMIBs possess unsuitable lifespans, low mechanical durability and inevitable side reactions attributable to their inherent severe volumetric/structure alteration during the charge-discharge cycles. These hitches could be solved using porous multimetallic alloy-based anodes, due to their impressive specific capacities, low working potential, low cost, and earth-abundance, which can meet sustainability and practical application needs. Meanwhile, great surface area, electrical conductivity, structural stability, and ability to accommodate the generated alkali metal ions can yield satisfactory coulomb efficiency and long durability. Immense efforts are dedicated to rationally designing porous multimetallic alloy-based anodes for RAMIBs, so it is essential to provide timely updates on this research area. Herein, we reviewed recent advances in porous multimetallic alloy-based anodes (i.e., Sn, Mn, Mo, Co, V, and Fe) for RAMIBs (i.e., lithium-ion batteries, sodium-ion batteries, and potassium-ion batteries. This is rooted in the engineering approaches (i.e., template-based, hydrothermal/solvothermal, chemical reduction, electrochemical deposition, sol-gel, and electrospinning) to fundamental insights (i.e., mechanisms, key parameters, and calculations) and precise evaluation for structural changes, and mechanisms by various experimental, theoretical, and in-situ analysis to optimizing their performance. Also, advances in RAMIBs recycling and circular economy were discussed. Eventually, we highlighted the current drawbacks and provided proposed perspectives to solve these issues and enable practical utilization of such anodes for large-scale applications.

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Synthesis of MnO2 nanoparticles and its effective utilization as high-performance of supercapacitor

Cited by 3 publications

References 24 publications

Tannic acid-mediated synthesis of flower-like mesoporous MnO2 nanostructures as T1–T2 dual-modal MRI contrast agents and dual-enzyme mimetic agents

Tannic acid-mediated synthesis of flower-like mesoporous MnO2 nanostructures as T1–T2 dual-modal MRI contrast agents and dual-enzyme mimetic agents

MnO2/Carbon Nanofibers Material as High-Performance Anode for Lithium-Ion Batteries

Recent advances in porous multimetallic alloy-based anodes for rechargeable alkali metal-ion batteries

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