Engineering metal organic framework (MOF)@MXene based electrodes for hybrid supercapacitors – A review

Chemical Engineering Journal, Год журнала: 2024, Номер 483, С. 149365 - 149365

Опубликована: Фев. 5, 2024

Язык: Английский

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Natural resource-derived NiO nanoparticles via aloe vera for high-performance symmetric supercapacitor

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Март 28, 2024

Abstract This investigation reported a one-step green synthesis of nickel oxide nanoparticles (NiO NPs) using aloe vera leaves extract solution for their application in supercapacitor. method used as reducing agent, which is very simple and cost-effective. The synthesized NPs were thoroughly characterized various techniques. X-ray diffraction analysis unequivocally confirmed the crystalline nature; field emission scanning electron microscopy transmission images showed different shapes forms an agglomerated cluster NPs. absorption spectra recorded from UV visible spectroscopy, while Fourier transform infrared spectroscopy provided insights into functional groups present. Electrochemical assessments carried out via cyclic voltammetry, galvanostatic charging-discharging electrochemical impedance spectroscopy. These experiments performed 2 M KOH electrolyte within 1.0 V potential window. Impressively, single electrode displayed remarkable specific capacitance 462 F g −1 at scan rate 1 mV s 336 current density 0.76 A . Further, symmetric two-electrode device (NiO||NiO) has been successfully fabricated by employing separator between electrodes. exhibited exceptional approximately 239 , along with energy 47.8 Wh kg power 545 W 1.2 also shows retention capacity 89% 10 after 2000 cycles 114% columbic efficiency. present study underscores effectiveness approach producing NiO establishes highly promising candidates supercapacitor applications, showcasing both excellent performance three-electrode system stability practical device. results collectively highlight efficacy NPs, establishing its candidate application.

Язык: Английский

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Carbonyl Chemistry for Advanced Electrochemical Energy Storage Systems

ACS Nano, Год журнала: 2024, Номер 18(31), С. 19950 - 20000

Опубликована: Июль 29, 2024

On the basis of sustainable concept, organic compounds and carbon materials both mainly composed light C element have been regarded as powerful candidates for advanced electrochemical energy storage (EES) systems, due to theie merits low cost, eco-friendliness, renewability, structural versatility. It is investigated that carbonyl functionality most common constituent part serves a crucial role, which manifests respective different mechanisms in various aspects EES systems. Notably, systematical review about concept progress chemistry beneficial ensuring in-depth comprehending functionality. Hence, comprehensive has summarized based on state-of-the-art developments. Moreover, working principles fundamental properties unit discussed, generalized three aspects, including redox activity, interaction effect, compensation characteristic. Meanwhile, pivotal characterization technologies also illustrated purposefully studying related structure, mechanism, performance profitably understand chemistry. Finally, current challenges promising directions are concluded, aiming afford significant guidance optimal utilization moiety propel practicality

Язык: Английский

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Two-dimensional MXene based innovative electrode materials for supercapacitors: Recent advances and prospects

Fuel, Год журнала: 2024, Номер 377, С. 132783 - 132783

Опубликована: Авг. 16, 2024

Язык: Английский

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A Supercapacitor Architecture for Extreme Low‐Temperature Operation Featuring MXene/Carbon Nanotube Electrodes with Vertically Aligned Channels and a Novel Freeze‐Resistant Electrolyte

Advanced Functional Materials, Год журнала: 2024, Номер 34(24)

Опубликована: Фев. 21, 2024

Abstract The electrochemical performance of supercapacitors drops precipitously at extreme low temperatures due to a multitude reasons, which includes electrolyte freezing, sluggish ion transport in the electrode and electrolyte, high charge transfer resistance electrode–electrolyte interfaces. To address interface resistance, new supercapacitor architecture is reported, MXene/carbon nanotube electrodes with vertically aligned channels are synthesized reduce tortuosity maximize contact area. These fabricated using directional‐freezing strategy, generating direct fast pathways. Further, freeze‐resistant shows ionic conductivity by designing double‐crosslinked polymer network binary solvent consisting liquid water, exhibits an ultralow freezing temperature −54 °C. An all‐in‐one assembled integrated polymerization strategy minimize interfacial resistances. resulting device delivers specific capacitance 231 F g −1 2 mV s maximum energy density 10.17 Wh kg , while maintaining retention 92%, even −50 developed this study, demonstrates feasibility storage temperatures.

Язык: Английский

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Inorganic-polymer composite electrolytes: basics, fabrications, challenges and future perspectives

Reviews in Inorganic Chemistry, Год журнала: 2024, Номер 44(3), С. 347 - 375

Опубликована: Фев. 19, 2024

Abstract This review covers the basics of, inorganic-polymer composite electrolyte materials that combine inorganic components with polymer matrices to enhance ionic conductivity and mechanical properties of electrolyte. These electrolytes are commonly employed in solid-state batteries, fuel cells, supercapacitors, other electrochemical devices. The incorporation components, such as ceramic nanoparticles or metal oxides, into a matrix provides several advantages. can improve overall by providing pathways for ion transport, reducing tortuosity matrix, facilitating hopping between chains. Additionally, often exhibit higher thermal chemical stability compared pure polymers, which safety durability electrolytes. Polymer used vary, but common choices include polyethylene oxide (PEO), polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN), oxide/polypropylene (PEO/PPO) blends. polymers offer good flexibility processability, allowing fabrication thin films membranes. methods depend on specific application desired properties. Common approaches solution casting, situ polymerization, melt blending, electrospinning. During process, typically dispersed mixed resulting is processed form, films, membranes, coatings. performance evaluated based their conductivity, strength, stability, compatibility electrode materials. Researchers continue explore various combinations well optimization strategies, further these advanced energy storage conversion applications.

Язык: Английский

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Design strategies and recent advancements of solid‐state supercapacitor operating in wide temperature range

Carbon Energy, Год журнала: 2024, Номер 6(6)

Опубликована: Фев. 27, 2024

Abstract Solid‐state supercapacitors (SSCs) are emerging as one of the promising energy storage devices due to their high safety, superior power density, and excellent cycling life. However, performance degradation safety issues under extreme conditions main challenges for practical application. With expansion human activities, such space missions, polar exploration, so on, investigation SSC with wide temperature tolerance, sustainability is highly desired. In this review, effects on systematically illustrated clarified, including properties electrolyte, ion diffusion, reaction dynamics supercapacitor. Subsequently, we summarize recent advances in wide‐temperature‐range SSCs from aspect electrolyte modification, electrode design, interface adjustment between especially critical concerns ionic conductivity stability. end, a perspective presented, expecting promote application harsh conditions.

Язык: Английский

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Sonochemical synthesis of high-performance MgCo2O4 nanostructures as cathode material for the assembly of hybrid supercapacitor

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 103, С. 12 - 22

Опубликована: Янв. 16, 2025

Язык: Английский

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Elevating Waste Biomass: Supercapacitor Electrode Materials Derived from Spent Coffee Grounds

Energy & Fuels, Год журнала: 2025, Номер unknown

Опубликована: Янв. 3, 2025

Waste biomass, such as spent coffee grounds (SCG), presents an abundant and sustainable source of carbon for energy storage other applications. In this study, ultrahigh surface area was synthesized from evaluated electrode material supercapacitors. Using alkali activation process with potassium hydroxide (KOH), the produced nanoporous exhibited BET (∼3600 m2/g) a large pore volume (1.80 cm3 g–1), 95% presence micropores. These structural characteristics significantly enhanced electrochemical performance material, making it suitable use in devices. Electron spin resonance (ESR) measurements were conducted to quantify number radicals, aiming shed light on mechanism behind formation high carbons. The activated tested two-electrode supercapacitor setup ionic liquid electrolyte, demonstrating excellent capacitive properties. It achieved specific capacitances 131 96 F g–1 at 0.5 4 A g–1, respectively. Furthermore, gravimetric density 52 W h kg–1 power 871 1 outperforming commercially available carbons SBET ∼2500 m2/g. testing showed stable across wide voltage window up 3.5 V, minimal pseudocapacitive behavior, confirming its suitability supercapacitors demands. This work underscores potential converting waste biomass into high-performance materials, offering environmentally friendly cost-effective solution. results highlight advantages using grounds-derived supercapacitors, opening pathways further development materials

Язык: Английский

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Application of metal-organic framework materials in supercapacitors

Journal of Energy Storage, Год журнала: 2025, Номер 113, С. 115535 - 115535

Опубликована: Фев. 8, 2025

Язык: Английский

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