Effect of cobalt doping on the enhanced energy storage performance of 2D vanadium diselenide: experimental and theoretical investigations

A, Sree Raj K; Adhikari, Surajit; Radhakrishnan, Sithara; Johari, Priya; Rout, Chandra Sekhar

doi:10.1088/1361-6528/ac66ee

Cited by 8 publications

(2 citation statements)

References 85 publications

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“…Copyright 2021 Elsevier, Ltd. (B) Theoretically estimated quantum capacitance and (C) cyclic voltammogram of bare VSe 2 and Co-doped VSe 2 . These panels were reproduced with permission from ref ( 85 ). Copyright 2022 IOP Publishing, Ltd. (D) Comparative cyclic voltammogram of TiS 2 , WS 2 , MoS 2 , and MoSe 2 coin cell devices.…”

Section: Transition Metal (Di)chalcogenidesmentioning

confidence: 99%

Quantum Capacitance of Two-Dimensional-Material-Based Supercapacitor Electrodes

Ghosh,

Behera,

Mishra

et al. 2023

Energy Fuels

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Electrochemical energy storage technology has emerged as one of the most viable solutions to tackle the challenge of fossil-fuel-based technology and associated global pollution. Supercapacitors are widely used for high-power applications, and there is tremendous ongoing effort to make them useful for high-energy storage applications. While electrode materials of supercapacitors play a central role in charge storage performance, insights into the contribution from different charge storage mechanisms are crucial from both fundamental and applied aspects. In this context, apart from the electric double layer and fast redox reaction at/near the surface, another pronounced contribution from the electrode is quantum capacitance (C Q). Here, the origin of C Q, how it contributes to the total capacitance, the possible strategies to improve it, and the state-of-art C Q of electrode materials, including carbon, two-dimensional materials, and their composites, are discussed. Although most of the studies on quantifying C Q are theoretical, some case studies on experimental measurements using standard electrochemical techniques are summarized. With an overview and critical analysis of theoretical studies on quantum capacitance of electrode materials, this review critically examines the supercapacitor design strategies, including choosing the right materials and electrolytes. These insights are also relevant to other types of clean energy storage technologies, including metal-ion capacitors and batteries.

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Section: Transition Metal (Di)chalcogenidesmentioning

confidence: 99%

Quantum Capacitance of Two-Dimensional-Material-Based Supercapacitor Electrodes

Ghosh,

Behera,

Mishra

et al. 2023

Energy Fuels

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show abstract

“…Likewise, Raj et al investigated the effect of energy storage performance of VSe 2 before and after the cobalt insertion and they found capacitance enhancement after the addition of Co due to the synergy interplay between the heteroatom and the TMTD. Finally, they carried out theoretical DFT simulations to validate the experimental findings [18].…”

Section: Introductionmentioning

confidence: 98%

Rational design of selenium inserted 1T/2H mixed-phase molybdenum disulfide for energy storage and pollutant degradation applications

Namsheer¹,

Thomas²,

Sharma³

et al. 2022

Nanotechnology

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MoS2 based materials are recognized as the promising candidate for multifunctional applications due to its unique physicochemical properties. But presence of lower number of active sites, poor electrical conductivity, and less stability of 2H and 1T MoS2 inherits its practical applications. Herein, we synthesized the Se inserted mixed-phase 2H/1T MoS2 nanosheets with abundant defects sites to achieve improved overall electrochemical activity. Moreover, the chalcogen insertion induces the recombination of photogenerated excitons and enhances the life of carriers. The bifunctional energy storage and photocatalytic pollutant degradation studies of the prepare materials are carried out. Fabricated symmetric solid-state supercapacitor showed an exceptional capacitance of 178 mF/cm2 with an excellent energy density of 8 µWh/cm2 and power density of 137 mW/cm2, with remarkable capacitance retention of 86.34% after successive 8000 charge-discharge cycles. The photocatalytic dye degradation experiments demonstrate that the prepared Se incorporated 1T/2H MoS2 is a good materials for dye degradation applications. Further, the DFT studies confirmed that the Se inserted MoS2 is a promising electrode material for supercapacitor applications with higher CQ due to a larger density of states near Fermi level as compared to pristine MoS2.

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2D/2D Molybdenum Sulfo Selenides/Black Phosphorus Heterostructures for Supercapacitors and Light‐Driven Hydrogen Generation Applications

Sanyal,

Pramoda

et al. 2024

Advanced Sustainable Systems

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Abstract2D transition metal dichalcogenide alloys are considered as the promising duo for energy storage and catalyst for light‐driven energy conversion applications due to their novel physicochemical properties. However, heterostructuring with other 2D materials is an effective strategy to enhance the charge storage kinetics as well as comprehensive spectral light response and efficient charge separation. Herein, Molybdenum sulfo selenide (MoSSe)/black phosphorous (BP) heterostructure is synthesized by a one‐pot solvothermal technique, and energy storage and conversion efficiency are characterized. Interestingly, the fabricated symmetric supercapacitor based on the MoSSe/BP hybrid shows an exceptional capacitance of 230 mF cm−2 with an excellent energy density of 31.9 µWh cm−2 and a power density of 805.7 µW cm−2. To validate the experimental findings, Density Functional Theory (DFT) computational simulations are carried out concurrently. The lower diffusion energy barrier for electrolytic ions, in the case of hybrid MoSSe/BP compared to pristine MoSSe, supports the higher charge storage performance. Finally, MoSSe/BP nanocomposites' photocatalytic hydrogen evolution reaction (HER) performance is evaluated under 400 W of UV–vis light, with eosin Y dye acting as a sensitizer and triethanolamine acting as a sacrificial agent. The MoSSe/BP nanocomposite exhibits the maximum photocatalytic HER activity of 5718 µmol h−1 g−1, greater than the bare MoSSe nanostructure.

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Effect of cobalt doping on the enhanced energy storage performance of 2D vanadium diselenide: experimental and theoretical investigations

Cited by 8 publications

References 85 publications

Quantum Capacitance of Two-Dimensional-Material-Based Supercapacitor Electrodes

Quantum Capacitance of Two-Dimensional-Material-Based Supercapacitor Electrodes

Rational design of selenium inserted 1T/2H mixed-phase molybdenum disulfide for energy storage and pollutant degradation applications

2D/2D Molybdenum Sulfo Selenides/Black Phosphorus Heterostructures for Supercapacitors and Light‐Driven Hydrogen Generation Applications

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