A facile route to growth of γ-MnOOH nanorods and electrochemical capacitance properties

Li, Zhongchun; Bao, Hongling; Miao, Xiaoyu; Xu-hong, Chen

doi:10.1016/j.jcis.2011.02.011

Cited by 72 publications

(28 citation statements)

References 43 publications

(56 reference statements)

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“…FT-IR spectra can be used to confirm the formation of Mn 3 O 4 and MnOOH [40,46]. For the MnOOH/Mn 3 O 4 (Figure 6a), sharp peaks at 448, 491, and 593 cm −1 are the characteristic modes of Mn-O bonds in Mn 3 O 4 and γ-MnOOH [47]. The peak at 418.6 and 531 cm −1 are the characteristic stretching mode and the bending mode of Mn-O bond at the octahedral sites of Mn 3 O 4 , respectively [48].…”

Section: Ft-ir Spectrum Analysismentioning

confidence: 99%

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

et al. 2020

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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.

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Section: Ft-ir Spectrum Analysismentioning

confidence: 99%

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

et al. 2020

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“…MnOOH is an important precursor for the synthesis of intercalation compounds, such as lithium manganese oxides, which are potentially inexpensive, environmentally friendly, positive materials for separation-based sensors in biology, electronics and in rechargeable lithium ion batteries. By simply adding inorganic salt, such as ammonium chloride and potassium iodide or N,N-dimethyl ammonium formate (DMF), and ethanol reagents to KMnO 4 , this one-step process often results in nanorods of ␥-MnOOH with specific characteristics, such as low surface area and relatively high uniform phases, similar to the solutions-based synthetic reaction approaches that are seldom used in research [53][54][55][56]. As discussed above, the addition of multiple redox materials to KMnO 4 results in a one phase structure and an intermediate lamellar structure product, which is supported by the fact that the permanganate ion is important for growing rod structures.…”

Section: Mnooh Nanostructuresmentioning

confidence: 99%

Exploitation of KMnO₄material as precursors for the fabrication of manganese oxide nanomaterials

Ahmed

2016

Journal of Taibah University for Science

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Since the first synthesis of KMnO 4 using pyrolusite mineral and potassium carbonate, the experimental synthesis of manganese oxide nanostructures and their application to multiple scientific disciplines have been undertaken extensively. In this review, potassium permanganate raw materials were shown to be more effective and versatile than other addition materials; therefore, they have been widely used to synthesize a variety of manganese oxide nanomaterials, including manganese dioxides, trioxides, tetraoxides, oxyhydroxides and metal-incorporated oxide nanomaterials. Recent progress focused on the synthesis and analysis of the novel characteristics of Mn-oxide nanostructures, emphasizing critical experiments to determine the chemical and physical parameters and the interplay between synthetic conditions and nanoscale morphologies. The Crystal Maker Demo program was applied to estimate the anisotropic transformations from KMnO 4 to Mn-oxide nanomaterials.

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“…Compared to MnO 2 , MnOOH has an inherent redox reaction during the facile electron-transfer process and is the main electroactive species for charge storage/delivery in the redox transition of the corresponding manganese oxide. 16,17 Recently, Li et al 18 reported that MnOOH nanorods, synthesized by the solvothermal method, showed a specic capacitance of 132 F g À1 ; however, the poor electronic conductivity oen hindered the electrode utilization for SCs. Sun et al 15 fabricated the reduced graphene oxide@MnOOH (RGO@MnOOH) aerogel composite, which exhibited a higher specic capacitance of 327 F g À1 .…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of polyaniline@γ-MnOOH on a buckypaper ternary composite electrode for free-standing supercapacitors

et al. 2017

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A facile route to growth of γ-MnOOH nanorods and electrochemical capacitance properties

Cited by 72 publications

References 43 publications

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

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

Exploitation of KMnO₄material as precursors for the fabrication of manganese oxide nanomaterials

Facile fabrication of polyaniline@γ-MnOOH on a buckypaper ternary composite electrode for free-standing supercapacitors

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A facile route to growth of γ-MnOOH nanorods and electrochemical capacitance properties

Cited by 72 publications

References 43 publications

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

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

Exploitation of KMnO4material as precursors for the fabrication of manganese oxide nanomaterials

Facile fabrication of polyaniline@γ-MnOOH on a buckypaper ternary composite electrode for free-standing supercapacitors

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Exploitation of KMnO₄material as precursors for the fabrication of manganese oxide nanomaterials