Peat soil-derived silica doped porous graphitic carbon with high yield for high-performance all-solid-state symmetric supercapacitors

Journal of Energy Storage, Journal Year: 2022, Volume and Issue: 50, P. 104278 - 104278

Published: Feb. 26, 2022

Language: Английский

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

The Chemical Record, Journal Year: 2022, Volume and Issue: 22(7)

Published: April 14, 2022

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

Language: Английский

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Recent Advancements in Electrochemical Deposition of Metal‐Based Electrode Materials for Electrochemical Supercapacitors

The Chemical Record, Journal Year: 2022, Volume and Issue: 22(7)

Published: March 21, 2022

Abstract The demand for energy storage devices with high and power densities has increased tremendously in this rapidly growing world. Conventional capacitors, fuel cells, lithium‐ion batteries have been used as the long term. However, supercapacitors are one of most promising because their specific capacitance, density, longer cycle life. Recent research focused on synthesizing transition‐metal oxides/hydroxides, carbon materials, conducting polymers supercapacitor electrode materials. performance can be improved by altering electrolytes, current collectors, experimental temperatures, film thickness. Thousands papers already published, reflecting significance elucidating how much demanding such fast‐growing generation. This review aims to illustrate materials loaded various conductive substrates electrochemical deposition employed provide broad knowledge synthetic pathways, which will pave way future research. We also discussed basic parameters involved studies advantages techniques through literature analysis. Finally, trends directions exploring metals/metal composites toward designing constructing viable, high‐class, even newly featured flexible electrodes, systems presented.

Language: Английский

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A High‐Energy Asymmetric Supercapacitor Based on Tomato‐Leaf‐Derived Hierarchical Porous Activated Carbon and Electrochemically Deposited Polyaniline Electrodes for Battery‐Free Heart‐Pulse‐Rate Monitoring

Small, Journal Year: 2023, Volume and Issue: 19(33)

Published: April 24, 2023

A simple and scalable method to fabricate a novel high-energy asymmetric supercapacitor using tomato-leaf-derived hierarchical porous activated carbon (TAC) electrochemically deposited polyaniline (PANI) for battery-free heart-pulse-rate monitor is reported. In this study, TAC prepared by pyrolysis, exhibiting nanosheet-type morphology high specific surface area of ≈1440 m2 g-1 , PANI onto cloth. The TAC- PANI- based demonstrates an electrochemical performance superior that symmetric supercapacitors, delivering capacitance 248 mF cm-2 at current density 1.0 mA . developed shows energy 270 µWh power 1400 µW as well excellent cyclic stability ≈95% retention after 10 000 charging-discharging cycles while maintaining ≈98% Coulombic efficiency. Impressively, the series-connected supercapacitors can operate extremely efficiently upon solar-panel charging under regular laboratory illumination.

Language: Английский

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Recent Progress in Polyaniline and its Composites for Supercapacitors

The Chemical Record, Journal Year: 2023, Volume and Issue: 24(1)

Published: May 24, 2023

Abstract Polyaniline (PANI) has piqued the interest of nanotechnology researchers due to its potential as an electrode material for supercapacitors. Despite ease synthesis and ability be doped with a wide range materials, PANI′s poor mechanical properties have limited use in practical applications. To address this issue, investigated using PANI composites materials highly specific surface areas, active sites, porous architectures, high conductivity. The resulting composite improved energy storage performance, making them promising Here, we provide overview recent developments PANI‐based supercapacitors, focusing on electrochemically carbon redox‐active composites. We discuss challenges opportunities synthesizing supercapacitor Furthermore, theoretical insights into electrical their materials. need review stems from growing improve performance. By examining progress field, comprehensive current state‐of‐the‐art This adds value by highlighting associated utilizing composites, thereby guiding future research directions.

Language: Английский

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Advanced High‐Energy All‐Solid‐State Hybrid Supercapacitor with Nickel‐Cobalt‐Layered Double Hydroxide Nanoflowers Supported on Jute Stick‐Derived Activated Carbon Nanosheets

Small, Journal Year: 2023, Volume and Issue: 20(22)

Published: Dec. 27, 2023

Abstract Developing efficient, lightweight, and durable all‐solid‐state supercapacitors is crucial for future energy storage systems. The study focuses on optimizing electrode materials to achieve high capacitance stability. This introduces a novel two‐step pyrolysis process synthesize activated carbon nanosheets from jute sticks (JAC), resulting in an optimized JAC‐2 material with yield (≈24%) specific surface area (≈2600 m 2 g −1 ). Furthermore, innovative situ synthesis approach employed hybrid nanocomposites (NiCoLDH‐1@JAC‐2) by integrating JAC nickel‐cobalt‐layered double hydroxide nanoflowers (NiCoLDH). These serve as positive the negative asymmetric (HSCs), exhibiting remarkable performance metrics. HSCs of 750 F , capacity 209 mAh (at 0.5 A ), density 100 Wh kg 250 W ) using PVA/KOH solid electrolyte, while maintaining outstanding cyclic Importantly, functional theory framework utilized validate experimental findings, underscoring potential this enhancing HSC enabling large‐scale production transition metal‐based layered hydroxides.

Language: Английский

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Fabrication of polythiophene/graphitic carbon nitride/V2O5 nanocomposite for high-performance supercapacitor electrode

Materials Science and Engineering B, Journal Year: 2023, Volume and Issue: 300, P. 117101 - 117101

Published: Dec. 16, 2023

Language: Английский

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Synthesis and characterization of polypyrrole/graphitic carbon nitride/niobium pentoxide nanocomposite for high‐performance energy storage applications

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: 141(15)

Published: Jan. 21, 2024

Abstract Graphitic carbon nitride (GCN) has been employed as a supercapacitor electrode because of its high carbon‐to‐nitrogen ratio and flexible structure. However, low surface area poor conductivity continue to be obstacles for practical usage. GCN's electrochemical characteristics are enhanced by the hybrid structure it forms with polypyrrole Nb 2 O 5 . The synthesized (Ppy)/GCN/niobium pentoxide (Nb ) (Ppy/GCN/Nb nanocomposite was tested supercapacitance cyclic voltammetry (CV) Alternating current impedance techniques in 6 M Potassium hydroxide(KOH) electrolyte. Ppy/GCN/Nb is linked network agglomerated GCN nanoparticles additional spherical shapes. specific capacitance determined 1177 Fg −1 at density Ag KOH average energy power densities 33 Wh kg 2991 W , respectively. showed excellent capacitance‐retention ability 97% after 10,000 cycles. results demonstrate stability efficient performance supercapacitors. found superior those reported other carbon‐based materials.

Language: Английский

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Inorganic Hydrogel Based on Low-Dimensional Nanomaterials

ACS Nano, Journal Year: 2024, Volume and Issue: 18(4), P. 2730 - 2749

Published: Jan. 15, 2024

Composed of three-dimensional (3D) nanoscale inorganic bones and up to 99% water, hydrogels have attracted much attention undergone significant growth in recent years. The basic units could be metal nanoparticles, nanowires, SiO2 graphene nanosheets, MXene which are then assembled into the special porous structures by sol–gel process or gelation via either covalent noncovalent interactions. high electrical thermal conductivity, resistance corrosion, stability across various temperatures, surface area make them promising candidates for diverse applications, such as energy storage, catalysis, adsorption, sensing, solar steam generation. Besides, some interesting derivatives, aerogels xerogels, can produced through further processing, diversifying their functionalities application domains greatly. In this context, we primarily provide a comprehensive overview current status including with compositions, mechanisms, exceptional practical performance fields related environmental applications.

Language: Английский

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Potential Applications of Nickel‐Based Metal‐Organic Frameworks and their Derivatives

The Chemical Record, Journal Year: 2022, Volume and Issue: 22(7)

Published: June 13, 2022

Abstract Metal‐Organic Frameworks (MOFs), a novel class of porous extended crystalline structures, are favored in different fields heterogeneous catalysis, CO 2 separation and conversion, energy storage (supercapacitors) due to their convenience synthesis, structural tailor‐ability, tunable pore size, high porosity, large specific surface area, devisable adjustable compositions. Nickel (Ni) is ubiquitous element extensively applied various catalysis its low cost, abundance, thermal chemical stability, environmentally benign nature. Ni‐based MOFs derivatives provide us with the opportunity modify properties Ni center improve potential as catalysts or materials. The recent achievements Ni−MOFs catalysts, membrane materials for electrode respective performance have been discussed this review.

Language: Английский

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