Ni_0.5Co_0.5S nano-chains: a high-performing intercalating pseudocapacitive electrode in asymmetric supercapacitor (ASC) mode for the development of large-scale energy storage devices

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(12), P. 5435 - 5452

Published: Jan. 1, 2024

The Ni 0.5 Co S nano-chain electrode showed a capacitance of 2001.6 F g −1 at 1 mV s scan rate and specific capacity 267 mA h (1920 ) current A in 4 M KOH aqueous electrolyte.

Language: Английский

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Exploring the Bifunctionality of Co₃S₄/NiS₂/Cu₂S Heterojunction Nanocomposites for Hybrid Supercapacitors and Double Z-Scheme-Driven Dye Degradation

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(3), P. 3249 - 3259

Published: Jan. 25, 2024

A trimetallic heterojunction-derived Co3S4/NiS2/Cu2S with different ratios through a two-step hydrothermal method was successfully synthesized, showing multifunctional properties such as excellent electrochemical behavior and high photocatalytic activity. Both performances were optimized by adjusting the concentration of Cu without any change in Co Ni concentrations. Among synthesized nanocomposites, CNCS-0.15 (Co3S40.5/NiS20.5/Cu2S0.15) depicted maximum specific capacity 464.16 C g–1 at 1 revealed from measurements. Further for real-time usage, assembling hybrid supercapacitor CNCS-0.15(+)||activated carbon(−) furnished an energy density 84.95 W h kg–1 power 1134 good retention 93.64% 5000 cycles. In addition, also displayed remarkable performance under visible light illumination utilizing Congo red (CR) dye. It could effectively degrade 91% CR (40 mg L–1) double Z-scheme mechanism owing to charge carriers' availability higher redox ability. The Mott–Schottky analysis along scavenging experiment confirmed involvement h+ O2–. radicals photodegradation. Due highly interconnected nanoflake architectures, holds promising application electrode active photocatalyst.

Language: Английский

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Scalable One-Pot Fabrication of Carbon-Nanofiber-Supported Noble-Metal-Free Nanocrystals for Synergetic-Dependent Green Hydrogen Production: Unraveling Electrolyte and Support Effects

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(15), P. 18768 - 18781

Published: April 8, 2024

Electrocatalytic hydrogen evolution reactions (HER) are envisaged as the most promising sustainable approach for green production. However, considerably high cost often associated with such reactions, particularly upon scale-up, poses a daunting challenge. Herein, facile, effective, and environmentally benign one-pot scalable is developed to fabricate MnM (M═Co, Cu, Ni, Fe) nanocrystals supported over in situ formed carbon nanofibers (MnM/C) efficient noble-metal-free electrocatalysts HER. The formation of entails impregnating cellulose an aqueous solution metal precursors, followed by annealing mixture at 550 °C. During impregnation process, acts reactor inducing reductions salts assistance ether hydroxyl groups drive mass production (several grams) ultralong (5 ± 1 μM) ornamented nanoparticles (10-14 nm size) average loading 2.87 wt %. For better electrocatalytic HER benchmarking, fabricated catalysts were tested different working electrodes, i.e., paper, foam, glassy carbon, presence electrolytes. All MnM/C have demonstrated appealing synergetic-effect-dependent activity, MnCo/C exhibiting best performance close that state-of-the-art commercial Pt/C (10 % Pt), overpotential 11 mV 10 mA cm

Language: Английский

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High-performance flexible solid-state asymmetric supercapacitor with NiCo₂S₄ as a cathode and a MXene-reduced graphene oxide sponge as an anode

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(21), P. 12762 - 12776

Published: Jan. 1, 2024

Ti 3 C 2 MXenes have revealed immense potential in energy storage systems.

Language: Английский

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Research Progress in the Preparation of Transition Metal Sulfide Materials and Their Supercapacitor Performance

Micromachines, Journal Year: 2024, Volume and Issue: 15(7), P. 849 - 849

Published: June 29, 2024

Transition metal sulfides are widely used in supercapacitor electrode materials and exhibit excellent performance because of their rich variety, low price, high theoretical specific capacity. At present, the main methods to prepare transition include hydrothermal method electrochemical method. In order further improve performance, two aspects can be addressed. Firstly, by controllable synthesis nanomaterials, porous structures large surface areas achieved, thereby improving ion transport efficiency. Secondly, combining with other energy storage materials, such as carbon oxides, synergy between different fully utilized. However, future research still needs address some challenges. guide in-depth research, it is necessary combine current research-derived knowledge propose a direction for development sulfide materials.

Language: Английский

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Unveiling the mass-loading effect on the electrochemical performance of Mn3O4 thin film electrodes: A combined computational and experimental study

Physica Scripta, Journal Year: 2024, Volume and Issue: 99(10), P. 105922 - 105922

Published: Aug. 21, 2024

Abstract The remarkable storage performance of manganese oxide (Mn 3 O 4 ) makes it an appealing option for use as electrodes in electrochemical capacitors. However, the kinetics were significantly influenced by mass loading electrode. Herein, we have inspected dependency on spray pyrolyzed Mn thin film along with correlation structural and morphological characteristics. X-ray diffraction Raman spectroscopic studies proven formation spinel a tetragonal structure. Morphological analysis revealed that all films exhibited fibrous structures interconnected patterns at higher loadings. Moreover, surface roughness wettability electrode variations loading. Notably, thin-film 0.4 mg cm −2 highest specific capacitance value 168 F g −1 5 mV s three-electrode system. Further, impedance showed there noticeable changes capacitive behaviour respect to Dunn approach was employed differentiate underlying mechanism Additionally, first-principles Density Functional Theory (DFT) carried out connection experimental study comprehend structure electronic band . This underscores critical importance enhancing electrodes.

Language: Английский

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Frontiers in transition metal oxide-based composites for high-performance supercapacitors: A comprehensive review

Inorganic Chemistry Communications, Journal Year: 2024, Volume and Issue: 170, P. 113429 - 113429

Published: Nov. 5, 2024

Language: Английский

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Recent advances and prospects of metal–organic framework-derived transition metal sulfide nanostructures of various dimensionalities for supercapacitor applications

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 99, P. 113359 - 113359

Published: Aug. 19, 2024

Language: Английский

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Ti3C2Tx MXene-based (Cobalt–Vanadium) bimetallic sulfides 0D@2D heterostructure composite for asymmetric supercapacitor application

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 119002 - 119002

Published: Feb. 1, 2025

Language: Английский

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Hierarchical nanostructuring of PCN-222/NiSe2@PANI composites for enhanced electrochemical performance in supercapattery and hydrogen evolution reaction applications

Applied Physics A, Journal Year: 2025, Volume and Issue: 131(3)

Published: Feb. 17, 2025

Language: Английский

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