Electrochemical supercapacitor performance of NiCo2O4 nanoballs structured electrodes prepared via hydrothermal route with varying reaction time

Yewale, M.A.; Kadam, R.A.; Kaushik, N.K.; Nguyen, L.N.; Nakate, Umesh T.; Lingamdinne, Lakshmi Prasanna; Koduru, Janardhan Reddy; Auti, P.S.; Vattikuti, S.V. Prabhakar; Shin, Dong-Chul

doi:10.1016/j.colsurfa.2022.129901

Cited by 32 publications

(6 citation statements)

References 86 publications

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“…The presence of metal oxide (Co-O) is demonstrated by the peak at 529.07 eV, whereas the presence of oxygen ions in nanoparticles and adsorbed water is shown by the peaks at 530.24 eV and 531.21 eV, respectively [ 26 , 27 , 28 ]. Figure 2 d additionally displays the carbon deconvolution spectra, which have three separate peak locations at 287.53 eV, 285.51 eV, and 284.10 eV, representing carbon bonds in C=O, C-N, and C-C, respectively [ 29 , 30 , 31 ]. Figure 2 e depicts the deconvolution spectra of the N 1s spectra, with two peaks at 399.85 eV and 398.04 eV corresponding to the C-C and C=C-N bonds, respectively.…”

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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“…It could be found that CNFs@Ni(OH) 2 /NiO-250 contained C, N, O and Ni ( Figure 5 a). In its Ni2p XPS spectrum ( Figure 5 b), the binding energy of 854.5 ev versus 872.3 ev was attributed to the characteristic peak at Ni2p 3/2 versus Ni2p 1/2, which contributed to the redox reactions of +3 and +2 states of Ni(OH) 2 and NiO in the electrochemical performance [ 19 , 20 ]. Compared with the characteristic peak at 855.6 ev for Ni2p 3/2 of pure Ni(OH) 2 , the characteristic peak was shifted to the right due to the partial production of NiO by calcination, while the characteristic peak for Ni2p 3/2 of pure NiO was at 853.7 ev.…”

Section: Resultsmentioning

confidence: 99%

Core-Shell Carbon Nanofibers@Ni(OH)2/NiO Composites for High-Performance Asymmetric Supercapacitors

Fan

2022

Materials

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The application of transition metal oxides/hydroxides in energy storage has long been studied by researchers. In this paper, the core-shell CNFs@Ni(OH)2/NiO composite electrodes were prepared by calcining carbon nanofibers (CNFs) coated with Ni(OH)2 under an N2 atmosphere, in which NiO was generated by the thermal decomposition of Ni(OH)2. After low-temperature carbonization at 200 °C, 250 °C and 300 °C for 1 h, Ni(OH)2 or/and NiO existed on the surface of CNFs to form the core-shell composite CNFs@Ni(OH)2/NiO-X (X = 200, 250, 300), in which CNFs@Ni(OH)2/NiO-250 had the optimal electrochemical properties due to the coexistence of Ni(OH)2 and NiO. Its specific capacitance could reach 695 F g−1 at 1 A g−1, and it still had 74% capacitance retention and 88% coulomb efficiency after 2000 cycles at 5 A g−1. Additionally, the asymmetric supercapacitor (ASC) assembled from CNFs@Ni(OH)2/NiO-250 had excellent energy storage performance with a maximum power density of 4000 W kg−1 and a maximum functional capacity density of 16.56 Wh kg−1.

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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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Electrochemical supercapacitor performance of NiCo2O4 nanoballs structured electrodes prepared via hydrothermal route with varying reaction time

Cited by 32 publications

References 86 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

Core-Shell Carbon Nanofibers@Ni(OH)2/NiO Composites for High-Performance Asymmetric Supercapacitors

Surfactant effect on energy storage performance of hydrothermally synthesized Ni₃V₂O₈

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Electrochemical supercapacitor performance of NiCo2O4 nanoballs structured electrodes prepared via hydrothermal route with varying reaction time

Cited by 32 publications

References 86 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

Core-Shell Carbon Nanofibers@Ni(OH)2/NiO Composites for High-Performance Asymmetric Supercapacitors

Surfactant effect on energy storage performance of hydrothermally synthesized Ni3V2O8

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Surfactant effect on energy storage performance of hydrothermally synthesized Ni₃V₂O₈