Hydrous nickel sulphide nanoparticle decorated 3D graphene foam electrodes for enhanced supercapacitive performance of an asymmetric device

Patil, Umakant M.; Katkar, Pranav K.; Marje, Supriya J.; Lokhande, C.D.; Li, Junfu

doi:10.1039/c8nj04228d

Cited by 19 publications

(25 citation statements)

References 43 publications

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“…Further, growth of cobalt phosphate thin films can take place by adsorption of colloidal particles from the solution at the nucleation centers on the SS substrate. Typically, at high temperature (at 365 K), decomposition of urea gradually forms CO 2 and NH 4 + ions in solution, and released NH 4 + acts as a complexing agent in the reaction bath. , After decomposition of urea, NH 4 + and Co 2+ ions get complexed as [Co(NH 3 )] 2+ . The amine complex avoids rapid nucleation and controls the reaction rate by gradually releasing Co 2+ ions.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Energy Density of All-Solid-State Asymmetric Supercapacitors Based on Morphologically Tuned Hydrous Cobalt Phosphate Electrode as Cathode Material

Katkar

Marje

Pujari

et al. 2019

ACS Sustainable Chem. Eng.

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In the present investigation, microflowers-like hydrous cobalt phosphate is prepared via a facile single-step hydrothermal method on stainless steel substrate. The microflowers-like morphology of hydrous cobalt phosphate thin film consists of microplates and further microplates converted to flakes by means of a change in length, width, and thickness with urea variation. Hydrous cobalt phosphate thin film electrode demonstrates a high specific capacitance of 800 F g −1 at 2 mA cm −2 with 33.62 Wh kg −1 energy density and 3.12 kW kg −1 power density. By taking advantage of hydrous cobalt phosphate thin film (as a cathode electrode) and copper sulfide thin film (as an anode electrode), the asymmetric devices (aqueous/all-solid-state) are fabricated. Aqueous asymmetric device shows a high specific capacitance of 163 F g −1 at 2 mA cm −2 with an energy density of 58.12 Wh kg −1 and power density of 3.52 kW kg −1 . Moreover, the all-solid-state asymmetric supercapacitor device delivers a high specific capacitance of 70 F g −1 at 2 mA cm −2 with 24.91 Wh kg −1 energy density and 2.63 kW kg −1 power density in PVA−KOH gel electrolyte. The long-term cyclic stability (94% after 3000 cycles) and actual practical demonstration (lightning 65 red LEDs) suggest an industrial application of the allsolid-state asymmetric device.

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Section: Resultsmentioning

confidence: 99%

Enhanced Energy Density of All-Solid-State Asymmetric Supercapacitors Based on Morphologically Tuned Hydrous Cobalt Phosphate Electrode as Cathode Material

Katkar

Marje

Pujari

et al. 2019

ACS Sustainable Chem. Eng.

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“…Hence, the mutual supporting roles of both rGO and as-synthesized oxides promote the higher specific capacitance of the present oxide-rGO composite materials for exhibiting high-performance supercapacitor performance. 29,31,32,34 Furthermore, the GCD plots of each composite material do not exhibit any significant iR drop in both the electrolyte mediums, which clearly demonstrate that a very negligible internal resistance can be generated at the interface of electrodes and electrolytes. 18,19,[21][22][23][24][25]32,34,63,64 Such a lower internal resistance can prevent extra heat generation during the charge/discharge processes and also restrict the loss of energy which is another important requisite for the energy-storage device applications.…”

Section: ■ Experimental Sectionsmentioning

confidence: 77%

Investigation of the Role of 3d-4d Elements in a Disordered Double Perovskite toward Efficient Photocatalytic Energy Conversion and Electrochemical Energy-Storage Behaviors

Saha,

Rom,

Sakla

et al. 2024

ACS Appl. Energy Mater.

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Toward the goal of achieving green and sustainable energy conversion and storage behaviors, double perovskite oxide materials are always pronounced not only due to their exciting properties but also for their advanced catalytic and electroactive nature. In order to understand the factual role of either 3d or 4d metal ions in double perovskites toward energy conversion and storage applications, herein we have demonstrated three ruthenium-based disordered double perovskites, namely, Ca 2 MnRuO 6 (CMRO), Ca 2 Mn 1.25 Ru 0.75 O 6 (CMRO-1), and Ca 2 Mn 0.75 Ru 1.25 O 6 (CMRO-2), by varying the Mn/Ru stoichiometry. The well-characterized phase-pure polycrystalline oxides are employed as efficient photocatalysts for visible light-driven water oxidation in a neutral pH medium. Even a small quantity of the present catalyst can evolve larger amounts of oxygen compared to reported photocatalysts. Furthermore, electrochemical supercapacitor performance has been accomplished by the CMRO compounds and reduced graphene oxide (rGO) composite electrodes. The electrochemical measurement reveals that the as-fabricated CMRO-2 oxide-rGO composite electrode possesses much higher capacitance of 598.8 F/g at a scan rate of 2 mV/s in 0.5 M H 3 PO 4 electrolyte solution compared to 0.5 M H 2 SO 4 common electrolyte medium. Remarkably, the CMRO-2 and rGO composite electrode exhibited a maximum energy density of 431.1 Wh/kg at a power density of 14.4 W/kg in 0.5 M H 3 PO 4 electrolyte. Notably, the slight variation of Mn/Ru concentration in title perovskite structures commendably affects the photocatalytic water oxidation and electrochemical supercapacitor performances. Such exciting structure−activity phenomena of 3d-4d transition metal-based oxide materials are also validated through density functional theory calculations.

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“…48 The capacitance could be higher as a result of the smaller size and the larger surface area resulting from the layered, two-dimensional morphology. 49 It has been observed that with the increase in current density, the specific capacitance decreases, as shown in Fig. 6(b).…”

Section: (C) Therementioning

confidence: 83%

Validating superior electrochemical properties of Ti₃C₂ MXene for supercapacitor applications through first-principles calculations

Irfan,

Haleem,

Usman

et al. 2024

New J. Chem.

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Hydrous nickel sulphide nanoparticle decorated 3D graphene foam electrodes for enhanced supercapacitive performance of an asymmetric device

Abstract: Hydrous nickel sulphide is successfully synthesized on graphene foam (Ni9S8/GF) using a facile chemical bath deposition (CBD) method for supercapacitor application.

Cited by 19 publications

References 43 publications

Enhanced Energy Density of All-Solid-State Asymmetric Supercapacitors Based on Morphologically Tuned Hydrous Cobalt Phosphate Electrode as Cathode Material

Enhanced Energy Density of All-Solid-State Asymmetric Supercapacitors Based on Morphologically Tuned Hydrous Cobalt Phosphate Electrode as Cathode Material

Investigation of the Role of 3d-4d Elements in a Disordered Double Perovskite toward Efficient Photocatalytic Energy Conversion and Electrochemical Energy-Storage Behaviors

Validating superior electrochemical properties of Ti₃C₂ MXene for supercapacitor applications through first-principles calculations

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Hydrous nickel sulphide nanoparticle decorated 3D graphene foam electrodes for enhanced supercapacitive performance of an asymmetric device

Abstract: Hydrous nickel sulphide is successfully synthesized on graphene foam (Ni9S8/GF) using a facile chemical bath deposition (CBD) method for supercapacitor application.

Cited by 19 publications

References 43 publications

Enhanced Energy Density of All-Solid-State Asymmetric Supercapacitors Based on Morphologically Tuned Hydrous Cobalt Phosphate Electrode as Cathode Material

Enhanced Energy Density of All-Solid-State Asymmetric Supercapacitors Based on Morphologically Tuned Hydrous Cobalt Phosphate Electrode as Cathode Material

Investigation of the Role of 3d-4d Elements in a Disordered Double Perovskite toward Efficient Photocatalytic Energy Conversion and Electrochemical Energy-Storage Behaviors

Validating superior electrochemical properties of Ti3C2 MXene for supercapacitor applications through first-principles calculations

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Validating superior electrochemical properties of Ti₃C₂ MXene for supercapacitor applications through first-principles calculations