Fabrication and evaluation of hybrid supercapacitor consisting of nano cobalt oxide and manganese oxide deposited electrochemically on nanoporous Au-Electrode

Prabhin, V.S.; Jeyasubramanian, K.; Benitha, V.S.; Veluswamy, Pandiyarasan; Cho, Byung Jin

doi:10.1016/j.electacta.2019.135199

Cited by 27 publications

(9 citation statements)

References 46 publications

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“…55 Figure 4d depicts the XPS spectrum of Mn 2p, which can be deconvoluted in Mn 2p 3/2 and Mn 2p 1/2 states with a spin− orbit energy level separation of 10.7 eV, confirming the presence of Mn 3+ at spinel oxide sites. 56 Ag 3d has two main peaks, which can be assigned to the Ag 3d 5/2 and Ag 3d 3/2 states, respectively. The Ag 3d 5/2 spectrum for Ag x O@ CMC_45 W can be deconvoluted into two peaks, 366.98 and 368.12 eV, which correspond to the Ag 1+ and Ag 2+ states, respectively (Figure 4e).…”

Section: Compositional Analysismentioning

confidence: 99%

High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated Ag_xO over Co–Mn–Cu Ternary Metal Oxide

Raghav,

Roy

2024

ACS Appl. Eng. Mater.

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Recent studies have indicated that ternary and quaternary metal oxides are efficient electrode materials for supercapacitors, owing to synergism between multiple metal ions. Herein, we report quaternary composite (QC) electrodes with hybrid nanostructures, consisting of Ag x O nanostructures sputter deposited over flower-like copper–manganese–cobalt oxide (CMC) nanostructures. Ag x O nanostructures were deposited using a DC magnetron sputtering system at different plasma powers. The morphology of the QC electrodes and the relative abundance of different oxidation states of Ag vary with plasma power, which affects the electrochemical performance of the electrodes. QC electrodes fabricated at 45 W plasma power had well-defined Ag x O nanodots on partially exposed CMC nanoflowers, which outperformed the QC electrodes with other morphologies, as well as ternary metal oxide and Ag x O-based electrodes. A specific capacitance of 2136 F/g at a scan rate of 1 mV/s was obtained with the outperformed electrode. The solid-state symmetric supercapacitor assembled with the best-performed electrodes delivered an energy density of 98.16 W h kg–1 at a power density of 3000 W kg–1.

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Section: Compositional Analysismentioning

confidence: 99%

High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated Ag_xO over Co–Mn–Cu Ternary Metal Oxide

Raghav,

Roy

2024

ACS Appl. Eng. Mater.

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“…50,51 Figure 4b represents the XPS analysis of Mn 2p, having a spin-orbit energy level separation of 10.7 eV between 2p 3/2 and 2p 1/2 states, which confirms the presence of Mn 3+ at spinel oxide sites. 52 Cu 2p spectra, can be deconvoluted into four major peaks, two are oxidation peaks representing Cu 2p 3/2 and Cu 2p 1/2 states and two are satellite peaks (Figure 4c). The peak at 933.08 eV binding energy represents the Cu 2p 3/2 state which can be further deconvoluted in two peaks.…”

Section: Compositional Analysismentioning

confidence: 99%

Hybrid Nanostructure of Sputter Decorated Nanodots of Ag₂O/AgO over Flower-like Mn–Co–Cu Ternary Metal Oxide for Electrocatalytic Oxygen Evolution Reaction

Raghav

Deepak

Roy

et al. 2023

ACS Appl. Energy Mater.

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Hybrid nanostructures of quaternary-composite metal oxide catalyst consisting of silver oxide nanodots over flower-like nanostructures of ternary metal oxide (MnCoCuO x ) were synthesized by a hydrothermal method, followed by DC magnetron sputtering. Multimetal ions in spinel structures are efficient OER catalysts as they have large number of active sites, enhancing the electron transfer process. The sputter decorated silver oxide nanodots enhances the electrochemically active surface area (ECSA) of the electrode, which further enhances the OER performance. X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR), and Raman spectroscopy were used to validate the structure and composition of synthesized material. Oxygen evolution reaction (OER) activities of the synthesized catalysts were investigated by conducting linear scan voltammetry (LSV) at sweeping rate of 5 mV/s, electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge−discharge (GCD). Quaternary-composite metal oxide catalysts were synthesized at various plasma powers, keeping other sputtering parameters fix. Silver oxide nanodots sputter decorated at 45 W over MnCoCuO x, showed the best catalytic properties for OER, having an overpotential of 83 mV via anodic scan and 110 mV via cathodic scan, Tafel slope of 65 mVdec −1 , ECSA of 826 cm 2 , mass activity of 143.7 A g −1 , and a turn over frequency (TOF) of 0.039 s −1 . The symmetric device fabricated using the best performing electrode as cathode and anode displayed efficient water splitting activity, achieving a current density of 10 mA/cm 2 at 1.37 V vs RHE, which is close to thermodynamic value of 1.23 V.

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“…So far, many hybrid composites of these active materials have been explored. [120][121][122][123][124][125] The supercapacitive performances of such hybrid composites are the sum of the performances of the different active materials. The electrode materials porous network allows for ion diffusion and storage, high electrical conductivity allows charge transportation, and physical/electrochemical stability improves cyclic-stability.…”

Section: Hscsmentioning

confidence: 99%

“…Combining high energy and high specific power with proper stability is the best intuitive approach to combining carbonaceous and redox‐active materials within a single system. So far, many hybrid composites of these active materials have been explored [120–125] . The supercapacitive performances of such hybrid composites are the sum of the performances of the different active materials.…”

Section: Characteristic Features Of Scsmentioning

confidence: 99%

Recent Progress in Carbonaceous and Redox‐Active Nanoarchitectures for Hybrid Supercapacitors: Performance Evaluation, Challenges, and Future Prospects

Shah

Aziz

Yamani

2022

The Chemical Record

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Due to advancements in technology, the energy demand is becoming more intense with time. The rapid fossil fuels consumption and environmental concerns triggered intensive research for alternative renewable energy resources, including sunlight and wind. Yet, due to their time‐dependent operations, significant electric energy storage systems are required to store substantial energy. In this regard, electrochemical energy storage devices, like batteries and supercapacitors (SCs), have recently attracted much research attention. Recent developments in SCs demonstrated that hybrid SCs (HSCs), which combine the excellent properties of batteries and SCs, increase the specific energy, specific power, specific capacitance, and life span. Carbonaceous and redox‐active materials have been explored as efficient electrode materials for applications in HSCs, ultimately enhancing their electrochemical performances. The HSCs performance significantly depends on the porosity, specific surface area, and conductivity of the electrode materials. This review article gives an overview of recent advances in developing HSCs with high specific power, specific energy, and long cyclic‐life. The fabrication of various HSCs materials using carbonaceous and redox‐active nanoarchitectures and their characterization are explored in‐depth, including electrode development, basic principles, and device engineering. A proper investigation has been conducted regarding state‐of‐the‐art materials as HSC electrodes. This review focuses on the most up‐to‐date, cutting‐edge, electrode materials for HSCs and their performance. The possibilities for novel electrode materials and their impact on the HSCs performance for future energy storage are also discussed.

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Fabrication and evaluation of hybrid supercapacitor consisting of nano cobalt oxide and manganese oxide deposited electrochemically on nanoporous Au-Electrode

Cited by 27 publications

References 46 publications

High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated Ag_xO over Co–Mn–Cu Ternary Metal Oxide

High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated Ag_xO over Co–Mn–Cu Ternary Metal Oxide

Hybrid Nanostructure of Sputter Decorated Nanodots of Ag₂O/AgO over Flower-like Mn–Co–Cu Ternary Metal Oxide for Electrocatalytic Oxygen Evolution Reaction

Recent Progress in Carbonaceous and Redox‐Active Nanoarchitectures for Hybrid Supercapacitors: Performance Evaluation, Challenges, and Future Prospects

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Fabrication and evaluation of hybrid supercapacitor consisting of nano cobalt oxide and manganese oxide deposited electrochemically on nanoporous Au-Electrode

Cited by 27 publications

References 46 publications

High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated AgxO over Co–Mn–Cu Ternary Metal Oxide

High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated AgxO over Co–Mn–Cu Ternary Metal Oxide

Hybrid Nanostructure of Sputter Decorated Nanodots of Ag2O/AgO over Flower-like Mn–Co–Cu Ternary Metal Oxide for Electrocatalytic Oxygen Evolution Reaction

Recent Progress in Carbonaceous and Redox‐Active Nanoarchitectures for Hybrid Supercapacitors: Performance Evaluation, Challenges, and Future Prospects

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High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated Ag_xO over Co–Mn–Cu Ternary Metal Oxide

High-Performance Supercapacitor with a Hybrid Nanostructure of Sputter-Decorated Ag_xO over Co–Mn–Cu Ternary Metal Oxide

Hybrid Nanostructure of Sputter Decorated Nanodots of Ag₂O/AgO over Flower-like Mn–Co–Cu Ternary Metal Oxide for Electrocatalytic Oxygen Evolution Reaction