In-situ synthesized and induced vertical growth of cobalt vanadium layered double hydroxide on few-layered V2CTx MXene for high energy density supercapacitors

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 661, P. 460 - 471

Published: Feb. 1, 2024

Language: Английский

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High-performance supercapacitor based on self-heteroatom-doped porous carbon electrodes fabricated from Mikania micrantha

Advanced Composites and Hybrid Materials, Journal Year: 2024, Volume and Issue: 7(1)

Published: Jan. 27, 2024

Language: Английский

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Investigation of Hybrid Electrodes of Polyaniline and Reduced Graphene Oxide with Bio-Waste-Derived Activated Carbon for Supercapacitor Applications

Polymers, Journal Year: 2024, Volume and Issue: 16(3), P. 421 - 421

Published: Feb. 2, 2024

Graphene-based materials have been widely studied in the field of supercapacitors. However, their electrochemical properties and applications are still restricted by susceptibility graphene-based to curling agglomeration during production. This study introduces a facile method for synthesizing reduced graphene oxide (rGO) nanosheets activated carbon based on olive stones (OS) with polyaniline (PAni) surface decoration development Several advanced techniques were used examine structural samples. The obtained PAni@OS−rGO (1:1) electrode exhibits high capacity 582.6 F·g−1 at current density 0.1 A·g−1, an energy 26.82 Wh·kg−1; thus, it demonstrates potential efficacious storage. In addition, this material remarkable cycling stability, retaining over 90.07% capacitance loss after 3000 cycles, indicating promising long cycle life. Overall, research highlights biomass-derived OS presence PAni rGO advance high-performance

Language: Английский

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A Novel Strategy for Rapid Synthesis of Nanostructured High-Entropy Metal Oxides through Thermal Plasma for Supercapacitor Applications

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(6), P. 5534 - 5544

Published: March 8, 2024

High-entropy oxides (HEOs) are an emerging candidate of materials that has sparked increased attention in the field sustainable energy because their unique structure, tailorable chemical composition, and tunable physical, chemical, functional properties. In this work, phase-pure HEO (Mn, Fe, Co, Ni, Cu)3O4 nanoparticles were synthesized using thermal plasma under optimum processing conditions at 11 kW input power with argon carbon dioxide as plasma-forming gases. As-synthesized powders annealed different temperatures (200 to 500 °C) subjected structural characterization. The electrochemical storage performance was investigated via a conventional three-electrode setup 1 M KOH electrolyte solution. For 0.5 A g–1 current density, electrode displayed specific capacitance 431 F g–1. Capacitance retention Coulombic efficiency found be 79.5 91.8% after 10,000 cycles 3 respectively. This study provides novel insight on rapid production through plasma, propitious rate around 1.5 g/min.

Language: Английский

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Mechanochemically Assisted Microwave-Induced Plasma Synthesis of a N-Doped Graphitic Porous Carbon-Based Aqueous Symmetric Supercapacitor with Ultrahigh Volumetric Capacitance and Energy Density

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(2), P. 1140 - 1150

Published: Jan. 19, 2024

In the realm of affordable and yet efficient energy storage devices required for future portable electronic gadgets electric vehicles, supercapacitors (SCs) have immense potential; however, prime bottleneck is low volumetric capacitance density caused by sluggish reaction kinetics a limited potential window (<1.2 V) in aqueous electrolytes. Therefore, to address this challenge, we aim design suitable biomass-derived nitrogen (N)-doped highly porous graphitic carbon (HP-NGC) via mechanochemically assisted microwave plasma-induced quick synthesis process deliver high density. Detailed characterization developed electrode materials revealed that structural functional properties are influenced crucial role mechanochemical treatment carried out just before carbonization through irradiation under N2 plasma. HP-NGC produces an almost 32% higher surface area (820 m2 g–1) than (620 N-doped (NGC) prepared without treatment. Moreover, shows more N doping (IDIG∼1.01) NGC (where 1.1 atom % IDIG ∼0.98), which significantly affects their electrochemical properties. The exhibited ∼145% (840 F cm–3) (168 Wh L–1) (308 (61.5 within wide 1.2 V measured at 0.5 A g–1 6 M KOH. Finally, assembled symmetric device (HP-NGC//HP-NGC) made electrodes exhibits 630 cm–3 with excellent rate performance (∼81% retained even after increasing current 10 times), high-energy 32 L–1, power 640 W L–1 g–1, those many reported carbon-based devices, making it promising candidate commercial applications.

Language: Английский

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Optimized Charge Dynamics of Sr₂Fe₂O₅/rGO Composite Electrodes: Redefining Supercapacitor Efficiency

ECS Journal of Solid State Science and Technology, Journal Year: 2024, Volume and Issue: 13(2), P. 021001 - 021001

Published: Jan. 22, 2024

Mixed transition metal oxides have become highly effective electrode materials due to their remarkable cyclic stability and improved capacitance, which has consequently led them display exceptional electrochemical performance. In this work, a facile synthesis of Sr 2 Fe O 5 /reduced graphene oxide composites was carried out through solvothermal technique investigate the X-ray diffraction patterns confirmed cubic perovskite structure . The morphological analysis revealed well-defined grains with sharp boundaries, having uniformly distributed porous regions. stoichiometric ratios sample compositions were using elemental analysis. electrolyte employed for characterizations 1 M potassium hydroxide (KOH), three-electrode cell. composite /15% reduced showed excellent performance compared other samples. It demonstrated maximum specific capacitance ∼360.29 F g −1 at lower scan rate 0.01 V s , as observed voltammetry. GCD system high value ∼1110 followed by energy density ∼32.76 Wh kg respectively. Nyquist plot less barrier charge transfer. Therefore, comprehensive investigation material suggested that as-synthesized could be utilized in high-performance storage devices.

Language: Английский

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Constructing Flower-Shaped NiCo₂S₄@CoAl-LDH Heterojunction Nanosheets Exhibits Extraordinary Electrochemical Behavior for a Light-Assisted Asymmetric Supercapacitor

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(7), P. 6459 - 6470

Published: March 21, 2024

The development of high-quality supercapacitors relies heavily on the exploitation composite electrode materials with well-defined nanostructures such as NiCo2S4 (NCS). In this study, a two-step solvent-thermal approach was used to create NiCo2S4@CoAl-LDH (NCS@CA) core–shell heterostructure for light-assisted supercapacitor, yielding noteworthy advancement in properties materials. resulting flower-shaped NCS@CA nanosheets exhibit great potential enhancing solar energy utilization. Compared solution without light, showed noticeable increase specific capacitance when exposed light. As result, demonstrated robust capacity 2120 F g–1 (120.4 cm–3) it operated at 1 A g–1. Also, excellent cycle life; after 10 000 cycles charge and discharge, 98.96% total still preserved. Light-assisted possessing extraordinary electrochemical have been designed activated carbon (AC) working electrodes. configuration exhibited an impressive density (35.1 Wh kg–1 751.2 W kg–1), representing 36.6% improvement over nonlight conditions. apparatus also exceptional cycling stability, holding onto 97.7% cycles. These findings confirm that is strong contender building emerging systems storage energy.

Language: Английский

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Bursting and transforming MOF into n-type ZnO and p-type NiO based heterostructure for supercapacitive energy storage

Nano Materials Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 1, 2024

Metal-organic frameworks (MOFs) have been considered as great contender and promising electrode materials for supercapacitors. However, their low capacity, aggregation, poor porosity necessitated the exploration of new approaches to enhance performance these active materials. In this study, sphere-like MOF were in-situ grown it subsequently burst, transformed into a desired metal oxide heterostructure comprising n-type ZnO p-type NiO (ZnO/NiO-350). The resulting optimized flower-like structure, composed interlaced nanoflakes derived from MOFs, greatly improved sites, porosity, functionality ZnO/NiO-350 exhibited superior electrochemical activities supercapacitors, compared parent MOF, bare n-type, counterparts. specific capacitance can reach 543 ​F ​g−1 at current density 1 ​A ​g−1. Theoretical modeling simulations employed gain insights atomic-scale properties Furthermore, an assembled hybrid device using carbon electrodes demonstrated excellent energy 44 ​Wh kg−1 power 1.6 Kw kg−1. After 5000 cycles 10 ​g−1, cycling stability remained 80 % initial capacitance. Overall, such evaluation unique with may be useful next generation supercapacitor electrode.

Language: Английский

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Synergistic CuCoS–PANI materials for binder-free electrodes in asymmetric supercapacitors and oxygen evolution

Nanoscale Advances, Journal Year: 2024, Volume and Issue: 6(5), P. 1507 - 1523

Published: Jan. 1, 2024

In advanced electronics, supercapacitors (SCs) have received a lot of attention.

Language: Английский

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Facile synthesis and electrochemical investigation of graphitic carbon nitride/manganese dioxide incorporated polypyrrole nanocomposite for high-performance energy storage applications

Journal of Polymer Engineering, Journal Year: 2024, Volume and Issue: 44(6), P. 408 - 419

Published: April 30, 2024

Abstract Manganese dioxide (MnO 2 ) nanoparticles were modified by graphitic carbon nitride (GCN) and polylpyrrole (Ppy) to enhance their electrochemical performance. The surface influence, crystalline structure, performance of the Ppy/GCN/MnO material characterized compared with those pristine MnO . It is found that modification can improve structural stability without decreasing its available specific capacitance. properties synthesized electrode evaluated using cyclic voltammetry (CV) AC impedance techniques in 5 M KOH electrolyte. Specific capacitances 486, 815, 921, 1377 F/g obtained for , Ppy/MnO GCN/MnO respectively, at A/g. This improvement attributed synergistic effect GCN Ppy material. has average energy power densities 172 Wh kg −1 2065 W respectively. Only % capacitance’s initial value lost after 10,000 cycles. resulting nanocomposite had very stable porous layered structures. work demonstrates nanomaterials exhibit good are materials supercapacitor applications.

Language: Английский

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