Mesoporous hexagonal nanorods of NiCo2O4 nanoparticles via hydrothermal route for supercapacitor application

Yewale, M.A.; Kadam, R.A.; Kaushik, N.K.; Linh, Nguyen Nhat; Teli, Aviraj M.; Shin, J.C.; Lingamdinne, Lakshmi Prasanna; Koduru, Janardhan Reddy; Shin, Dong-Chul

doi:10.1016/j.cplett.2022.139654

Cited by 22 publications

(6 citation statements)

References 57 publications

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“…Similarly, two peaks at 779.03 eV and 793.91 eV indicate the presence of the Co 2+ state, while another two peaks at 780.26 eV and 795.47 eV confirm the presence of the Co 3+ state. Furthermore, two satellite peaks at 788.72 eV and 803.61 eV are characteristic of Co 2+ [ 23 , 24 , 25 ]. The oxygen deconvolution spectra are displayed in Figure 2 c, with three peaks at 529.07 eV, 530.24 eV, and 531.21 eV.…”

Section: Resultsmentioning

confidence: 99%

Elevating Supercapacitor Performance of Co3O4-g-C3N4 Nanocomposites Fabricated via the Hydrothermal Method

Yewale,

Kumar,

Teli

et al. 2024

Micromachines

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The hydrothermal method has been utilized to synthesize graphitic carbon nitride (g-C3N4) polymers and cobalt oxide composites effectively. The weight percentage of g-C3N4 nanoparticles influenced the electrochemical performance of the Co3O4-g-C3N4 composite. In an aqueous electrolyte, the Co3O4-g-C3N4 composite electrode, produced with 150 mg of g-C3N4 nanoparticles, revealed remarkable electrochemical performance. With an increase in the weight percentage of g-C3N4 nanoparticles, the capacitive contribution of the Co3O4-g-C3N4 composite electrode increased. The Co3O4-g-C3N4-150 mg composite electrode shows a specific capacitance of 198 F/g. The optimized electrode, activated carbon, and polyvinyl alcohol gel with potassium hydroxide were used to develop an asymmetric supercapacitor. At a current density of 5 mA/cm2, the asymmetric supercapacitor demonstrated exceptional energy storage capacity with remarkable energy density and power density. The device retained great capacity over 6k galvanostatic charge–discharge (GCD) cycles, with no rise in series resistance following cyclic stability. The columbic efficiency of the asymmetric supercapacitor was likewise high.

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Section: Resultsmentioning

confidence: 99%

Elevating Supercapacitor Performance of Co3O4-g-C3N4 Nanocomposites Fabricated via the Hydrothermal Method

Yewale,

Kumar,

Teli

et al. 2024

Micromachines

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“…Additionally, they can undergo various redox reactions due to their numerous oxidation states, which eventually offer higher specific capacitance than binary metal oxides. AB 2 O 4 [27][28][29], A 3 B 2 O 8 [30][31][32], and ABO 4 [33,34] are three structural variants of ternary metal oxides (A x B y O z ); among these, metal vanadates (M 3 V 2 O 8 , where M = Ni or Co) have drawn particular interest in SCs and batteries owing to their excellent energy storage capability. However, to date, very few studies have reported the supercapacitive performance of Ni 3 V 2 O 8 material, and most of the reports are on using Ni 3 V 2 O 8 as the positive electrode material of the Li-ion battery system.…”

Section: Introductionmentioning

confidence: 99%

Surfactant effect on energy storage performance of hydrothermally synthesized Ni₃V₂O₈

Mandal,

Singh,

Raha

et al. 2024

Nanotechnology

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We report a study to improve the ternary oxide Ni3V2O8's electrochemical energy storage capabilities through correct surfactanization during hydrothermal synthesis. In this study, Ni3V2O8 nanomaterials were synthesized in three different forms: one with a cationic surfactant (CTAB), one with an anionic surfactant (SLS), and one without any surfactant. FESEM study reveals that all the synthesized Ni3V2O8 nanomaterials had a small stone-like morphology. The electrochemical study showed that anionic surfactant-assisted Ni3V2O8 (NVSLS) had a maximum of 972 F/g specific capacitance at 1A/g current density, whereas cationic surfactant-assisted Ni3V2O8 (NVCTAB) had the lowest specific capacitance of 162 F/g. The specific capacitance and the capacitance retention of the NVSLS (85% after 4000 cycles) based electrode was much better than that of the NVCTAB (76% after 4000 cycles) based electrode. The improved energy storage properties of the NVSLS electrode are attributed to its high diffusion coefficient, high surface area, and enriched elemental nickel, as compared to the NVCTAB electrode. All these excellent electrochemical properties of NVSLS electrode indicates their potential usage in asymmetric supercapacitor application.

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“…This, in turn, contributes to increasing electrochemical activity and capacitance of electrodes, improving their microstructural stability during cyclic charging–discharging. According to the literature, one of the most promising and popular methods for obtaining hierarchically organized oxide nanostructures is hydrothermal synthesis, which enables the formation of the widest range of different morphologies: hollow spheres [ 31 ], nanotubes, nanofibers and nanorods [ 25 , 32 , 33 , 34 ], nanosheets and plate-like structures [ 35 , 36 , 37 ], or nanoflowers [ 26 , 38 , 39 ], both as nanopowders and as coatings. At the same time, a number of papers [ 40 , 41 ] note the high potential of the NiCo 2 O 4 microstructure, consisting of nanorods organized in the form of spheres (“urchin-like” microstructure), with respect to improving the electrochemical characteristics of their supercapacitor electrodes (high specific capacitance values, low charge transfer resistance, and increased cyclic stability).…”

Section: Introductionmentioning

confidence: 99%

Microplotter Printing of a Miniature Flexible Supercapacitor Electrode Based on Hierarchically Organized NiCo2O4 Nanostructures

et al. 2023

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The hydrothermal synthesis of a nanosized NiCo2O4 oxide with several levels of hierarchical self-organization was studied. Using X-ray diffraction analysis (XRD) and Fourier-transform infrared (FTIR) spectroscopy, it was determined that under the selected synthesis conditions, a nickel-cobalt carbonate hydroxide hydrate of the composition M(CO3)0.5(OH)·0.11H2O (where M–Ni2+ and Co2+) is formed as a semi-product. The conditions of semi-product transformation into the target oxide were determined by simultaneous thermal analysis. It was found by means of scanning electron microscopy (SEM) that the main powder fraction consists of hierarchically organized microspheres of 3–10 μm in diameter, and individual nanorods are observed as the second fraction of the powder. Nanorod microstructure was further studied by transmission electron microscopy (TEM). A hierarchically organized NiCo2O4 film was printed on the surface of a flexible carbon paper (CP) using an optimized microplotter printing technique and functional inks based on the obtained oxide powder. It was shown by XRD, TEM, and atomic force microscopy (AFM) that the crystalline structure and microstructural features of the oxide particles are preserved when deposited on the surface of the flexible substrate. It was found that the obtained electrode sample is characterized by a specific capacitance value of 420 F/g at a current density of 1 A/g, and the capacitance loss during 2000 charge–discharge cycles at 10 A/g is 10%, which indicates a high material stability. It was established that the proposed synthesis and printing technology enables the efficient automated formation of corresponding miniature electrode nanostructures as promising components for flexible planar supercapacitors.

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Mesoporous hexagonal nanorods of NiCo2O4 nanoparticles via hydrothermal route for supercapacitor application

Cited by 22 publications

References 57 publications

Elevating Supercapacitor Performance of Co3O4-g-C3N4 Nanocomposites Fabricated via the Hydrothermal Method

Elevating Supercapacitor Performance of Co3O4-g-C3N4 Nanocomposites Fabricated via the Hydrothermal Method

Surfactant effect on energy storage performance of hydrothermally synthesized Ni₃V₂O₈

Microplotter Printing of a Miniature Flexible Supercapacitor Electrode Based on Hierarchically Organized NiCo2O4 Nanostructures

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Mesoporous hexagonal nanorods of NiCo2O4 nanoparticles via hydrothermal route for supercapacitor application

Cited by 22 publications

References 57 publications

Elevating Supercapacitor Performance of Co3O4-g-C3N4 Nanocomposites Fabricated via the Hydrothermal Method

Elevating Supercapacitor Performance of Co3O4-g-C3N4 Nanocomposites Fabricated via the Hydrothermal Method

Surfactant effect on energy storage performance of hydrothermally synthesized Ni3V2O8

Microplotter Printing of a Miniature Flexible Supercapacitor Electrode Based on Hierarchically Organized NiCo2O4 Nanostructures

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Surfactant effect on energy storage performance of hydrothermally synthesized Ni₃V₂O₈