Structure, cation valence states and electrochemical properties of nanostructured Mn3O4

Bose, Vipin C.; Biju, Vasudevanpillai

doi:10.1016/j.mssp.2015.02.016

Cited by 20 publications

(7 citation statements)

References 51 publications

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“…The deconvoluted peaks at 640.0 and 651.1 eV are assigned to Mn 3+ , whereas the peaks at 641.8 and 652.4 eV are due to the Mn 3+ species, respectively. , There were no further deconvolutions found for Mn 2p states. Moreover, the value of binding energy and the difference between the binding energies were quite close to those previously described in the literature . The high-resolution deconvolution spectra of O 1s are shown in Figure c.…”

Section: Resultssupporting

confidence: 86%

Self-Assembly of Hausmannite Mn₃O₄ Triangular Structures on Cocosin Protein Scaffolds for High Energy Density Symmetric Supercapacitor Application

Yesuraj

Vajravijayan²,

Yang

et al. 2022

Langmuir

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Recent advances in using biological scaffolds for nanoparticle synthesis have proven to be useful for preparing various nanostructures with uniform shape and size. Proteins are significant scaffolds for generating various nanostructures partly because of the presence of many functional groups to recognize different chemistries. In this endeavor, cocosin protein, an 11S allergen, is prepared from coconut fruit and employed as a potential scaffold for synthesizing Mn3O4 materials. The interaction between protein and manganese ions is studied in detail through isothermal calorimetric titration. At increased scaffold availability, the Mn3O4 material adopts the exact hexamer structure of the cocosin protein. The electrochemical supercapacitive properties of the cocosin–Mn3O4 material are found to have a high specific capacitance of 751.3 F g–1 at 1 A g–1 with cyclic stability (92% of capacitance retention after 5000 CV cycles) in a three-electrode configuration. The Mn3O4//Mn3O4 symmetric supercapacitor device delivers a specific capacitance of 203.8 F g–1 at 1 A g–1 and an outstanding energy and power density of 91.7 W h kg–1 and 899.5 W kg–1, respectively. These results show that cocosin–Mn3O4 could be considered a suitable electrode for energy storage applications. Moreover, the cocosin protein to be utilized as a novel scaffold in protein–nanomaterial chemistry could be useful for protein-assisted inorganic nanostructure synthesis in the future.

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Section: Resultssupporting

confidence: 86%

Self-Assembly of Hausmannite Mn₃O₄ Triangular Structures on Cocosin Protein Scaffolds for High Energy Density Symmetric Supercapacitor Application

Yesuraj

Vajravijayan²,

Yang

et al. 2022

Langmuir

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Section: Resultsmentioning

confidence: 99%

“…The absorption band centered at 470 cm -1 is characteristic of the stretching vibrations of the Mn 3+ -O bonds in the octahedral sites of the Mn 3 O 4 phase [56]. When there is an excess of vacancies in this structure, Mn 3+ to Mn 4+ oxidation usually occurs and this causes this band to move to highest wavenumbers, characterizing the Mn 4+ -O bond [56]. It is possible to observe this displacement for the MnO 480 ºC sample, where the band displace to 482 cm -1 , however, this is the result of the Mn 4+ ions in Mn 5 O 8 phase, formed from the heat treatment.…”

Section: Resultsmentioning

confidence: 99%

Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement

et al. 2022

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Manganese oxides were synthesized during 40 min at 140 ºC via Microwave-Assisted Hydrothermal (MAH) method and treated at different temperatures in order to evaluate the phase evolution using structure refinement (Rietveld method). The samples obtained were heat treated at temperatures defined by means of thermal analysis (160 ºC, 480 ºC, 715 ºC, 870 ºC, 920 ºC and 1150 ºC) and analyzed by X-Ray Diffractometry (XRD), X-Ray Fluorescence (XRF), Fourier Transform Infrared (FTIR) spectroscopy, Raman scattering, UV-Vis absorption and Scanning Electron Microscopy (SEM). Structural characterizations allowed to identify five distinct phases:

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“…The high demand for energy and power density in modern batteries has provoked intense study of the utilization of various nanostructures in electrodes, since they have been presumed to offer intrinsic benefits such as short diffusion lengths, large surface areas, and enhanced ionic and electronic conductivities. [4][5][6][7][8][9][10][11][12][13][14][15] Practical challenges related to the integration of these nanostructures, such as high fabrication cost (due to the complex synthetic process) and low volumetric energy density (due to reduced packing density), have contributed to slow adoption. Also, nanostructured electrodes are prone to undesired side reactions because of the large surface area that is exposed to the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Geometric consideration of nanostructures for energy storage systems

Park

et al. 2016

Journal of Applied Physics

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Battery performance and its fade are determined by various aspects such as the transport of ions and electrons through heterogeneous internal structures; kinetic reactions at the interfaces; and the corresponding interplay between mechanical, chemical, and thermal responses. The fundamental factor determining this complex multiscale and multiphysical nature of a battery is the geometry of active materials. In this work, we systematically consider the tradeoffs among a selection of limiting geometries of media designed to store ions or other species via a diffusion process. Specifically, we begin the investigation by considering diffusion in spheres, rods, and plates at the particle level, in order to assess the effects of geometry, diffusivity, and rate on capacity. Then, the study is extended to considering of the volume fraction and particle network, as well as kinetics at the interface with electrolyte. Our study suggests that, in terms of overall bulk level material performance, thin film batteries may generate the highest energy density with high power capability when they are implemented at nanoscales or with highly diffusion materials. V C 2016 AIP Publishing LLC.

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Structure, cation valence states and electrochemical properties of nanostructured Mn3O4

Cited by 20 publications

References 51 publications

Self-Assembly of Hausmannite Mn₃O₄ Triangular Structures on Cocosin Protein Scaffolds for High Energy Density Symmetric Supercapacitor Application

Self-Assembly of Hausmannite Mn₃O₄ Triangular Structures on Cocosin Protein Scaffolds for High Energy Density Symmetric Supercapacitor Application

Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement

Geometric consideration of nanostructures for energy storage systems

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Structure, cation valence states and electrochemical properties of nanostructured Mn3O4

Cited by 20 publications

References 51 publications

Self-Assembly of Hausmannite Mn3O4 Triangular Structures on Cocosin Protein Scaffolds for High Energy Density Symmetric Supercapacitor Application

Self-Assembly of Hausmannite Mn3O4 Triangular Structures on Cocosin Protein Scaffolds for High Energy Density Symmetric Supercapacitor Application

Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement

Geometric consideration of nanostructures for energy storage systems

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Product

Resources

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Self-Assembly of Hausmannite Mn₃O₄ Triangular Structures on Cocosin Protein Scaffolds for High Energy Density Symmetric Supercapacitor Application

Self-Assembly of Hausmannite Mn₃O₄ Triangular Structures on Cocosin Protein Scaffolds for High Energy Density Symmetric Supercapacitor Application