Engineering few-layer MoS2 and rGO heterostructure composites for high-performance supercapacitors

Advanced Composites and Hybrid Materials, Journal Year: 2025, Volume and Issue: 8(1)

Published: Jan. 7, 2025

Abstract Molybdenum disulfide (MoS 2 ) after the few-layer (FL) processing draws attention to its attractive characteristics, such as broadening interlayer spacing, increasing active sites, and promoting purity of metallic phase. Notwithstanding, poor stability easy aggregation FL-MoS limit potential for development in field electrochemistry. Herein, a nanocomposite between reduced graphene oxide (rGO) is successfully constructed via one-pot hydrothermal method. Furthermore, @rGO composite with stable structure obtained by regulating amount rGO. The excellent supercapacitor capacitances building heterostructure composites rGO are displayed, owing synergistic effects occurring heterostructure. optimal sample @rGO-2 possesses specific capacitance 346.1 F g −1 at 1 A rate ability 57.2%. Moreover, remains 99.1% 10,000 cyclic charges discharges. More importantly, theoretical calculations confirm source extra raise conductivity @rGO. Also, @rGO-2//AC flexible asymmetric device fabricated, which presents superior energy density power 84.31 µWh cm −2 700 µW , 51.42 3500 . This work verifies storage electrochemical application.

Language: Английский

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Antifreezing, Antidrying, and Conductive Hydrogels for Electronic Skin Applications at Ultralow Temperatures

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: April 9, 2024

Although conductive hydrogel-based flexible electronic devices have superb flexibility and high conductivities, they tend to malfunction in dry or frigid areas. Herein, an ultralow-temperature tolerant, antidrying, composite hydrogel is designed for skin applications on the basis of synergy double-cross-linked polymer networks, Hofmeister effect, electrostatic interaction fabricated by situ free radical polymerization 2-acrylamido-2-methyl-1-propanesulfonic acid acrylic presence poly(vinyl alcohol) MXene sheets, followed impregnation with LiCl. Thanks LiCl charged polar terminal groups synthesized polymers, can not only bear ultralow temperature -80 °C without freezing but also maintain its original mass. Meanwhile, resultant possesses satisfactory self-regeneration ability benefiting from moisturizing effect The network sheets greatly improves ionic conductivity at low temperatures, exhibiting 1.4 S m-1 °C. Furthermore, assembled multifunctional efficient monitoring human motions antifreezing antidrying features along favorable conductivity, tensile strength, outstanding make promising regions.

Language: Английский

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3D printing driving innovations in extreme low-temperature energy storage

Virtual and Physical Prototyping, Journal Year: 2025, Volume and Issue: 20(1)

Published: Feb. 6, 2025

Extreme low-temperature environments, such as those in aerospace, polar expeditions, and deep-sea exploration, demand efficient energy storage systems. Conventional technologies face major limitations under these conditions, including electrolyte freezing, restricted interfacial reaction kinetics, microstructural instability. In contrast, 3D printing offers transformative solutions with precise control, multifunctional material integration, optimisation, effectively addressing challenges related to compatibility structural complexity. However, the mechanisms for optimising performance remain poorly understood, of processes materials needs further exploration. Moreover, comprehensive integration materials, processes, device designs remains an ongoing challenge. This review systematically summarises key their characteristics storage, exploring potential pathways through which enhances performance. Particular emphasis is placed on its unique applications design, engineering, multi-material coupling. Unlike studies focused single or technologies, this adopts interdisciplinary systematic framework, linking properties optimisation. It provides critical theoretical guidance practical insights advancing scientific understanding engineering extreme technologies.

Language: Английский

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Mechanically Strong and Tough Organohydrogels for Wide Temperature Tolerant, Flexible Solid‐State Supercapacitors

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 8, 2024

Abstract Hydrogel‐based flexible solid‐state supercapacitors (SSCs) hold great promise for wearable electronics, yet significant challenges persist in simultaneously achieving excellent mechanical properties, high ionic conductivity, outstanding electrochemical and wide operating temperature ranges. Here, this study presents a straightforward method synthesizing dual crosslinked polyvinyl alcohol‐polyimide (PVA‐PI) organohydrogels via simple one‐pot synthesis followed by freezing‐thawing process. The controlled networks with significanonetly different crosslinking densities robust intermolecular hydrogen bonding interactions facilitated the macromolecular crosslinker of PI, endow both properties conductivity. Furthermore, SSCs based on PVA‐PI are fabricated, which can exhibit performance at temperatures ranging from −40 to 80 °C. Specifically, energy density reaches 16.7 µWh cm −2 even °C under power 410.0 µW . These also show stability various deformations, such as bending compression, alongside exceptional long‐term cycling (over 10 000 cycles) capacitance retention 50 strategy, along mechanism enhancing hydrogels, demonstrated offers insights development strong hydrogels/organohydrogels broad adaptability soft electronic applications.

Language: Английский

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Enhancing Energy Density in Flexible All‐Solid‐State Supercapacitors via Dielectricizer Zwitterion‐Containing Quasi‐Solid‐State Polymer Electrolyte

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 4, 2024

Abstract To improve the energy density of quasi‐solid‐state polymer electrolyte (QPE)‐based supercapacitors, design zwitterion‐containing QPE (ZQPE) with a high dielectric constant (ɛ s ) is proposed. This enhancement would increase capacitance ZQPE‐based given direct proportionality between and constant. The optimized ZQPE exhibits ionic conductivity (2.2 × 10 −3 S cm −1 good mechanical robustness (4.1 4 Pa) at room temperature. shows much higher static = 69) than zwitterion‐free 48), as supported by functional theory calculations molecular dynamics simulations. flexible all‐solid‐state supercapacitor, fabricated activated carbon electrodes, excellent electrochemical performance. incorporation zwitterion to results in an specific from 178 225 F g wide operating potential window (0–4 V). supercapacitor also large 142 Wh kg power 464 W remarkable long‐term cycling stability, retaining 80% its retention over 000 cycles even under rolling deformation for 1500 cycles. strategy offers new insights developing designs supercapacitors.

Language: Английский

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Proton Hydrogel-Based Supercapacitors with Rapid Low-Temperature Self-Healing Properties

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(31), P. 40980 - 40991

Published: July 30, 2024

Hydrogel-based supercapacitors are an up-and-coming candidate for safe and portable energy storage. However, it is challenging hydrogel electrolytes to achieve high conductivity rapid self-healing at subzero temperatures because the movements of polymer chains reconstruction capability broken dynamic bonds limited. Herein, a highly conductive proton polyacrylamide-phytic acid (PAAm-PA) electrolyte with autonomous ability excellent adhesion over wide temperature range developed. PA, as donor center, endows hydrogels (102.0 mS cm–1) based on Grotthuss mechanism. PA can also prevent crystallization water form multiple reversible hydrogen in network, which solves dysfunction cryogenic environment. Accordingly, demonstrate fast low-temperature efficiency 79.4% within 3 h −20 °C. In addition, present outstanding adhesiveness electrodes due generation between activated carbon electrodes. As result, integrated hydrogel-based tight bonding electrode/electrolyte interface deliver 139.5 mF cm–2 specific capacitance 25 Moreover, display superb ability, achieving 92.1% recovery after three cutting–healing cycles Furthermore, only 6.4% degradation 5000 charging–discharging This work provides roadmap designing all-in-one flexible storage devices range.

Language: Английский

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Hybrid organic-inorganic functional nanocomposites: From basis to applications in stretchable sensing and energy devices

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 163, P. 100933 - 100933

Published: Feb. 1, 2025

Language: Английский

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High pseudocapacitive and self-supporting three-dimensional porous MXene integrated carbon nanotubes composite film featuring oxygen-rich for flexible supercapacitors

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 638, P. 236637 - 236637

Published: March 1, 2025

Language: Английский

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Carbon dot-infused gel polymer electrolytes: a new horizon for redox-enhanced supercapacitors

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179514 - 179514

Published: March 1, 2025

Language: Английский

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A Hierarchical Multimetal Oxides@Graphene Fabric Electrode with High Energy Density and Robust Cycling Performance for Flexible Supercapacitors

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

An advanced structure capable of hosting large electrochemical activity with desired balance in ion diffusion kinetics, faradic charge storage, and robust stability is the key to developing high-performance fabric-based supercapacitors (FSCs). Herein, we develop a hierarchical multimetal oxides@graphene fabric (Cu-MO@GFF) as supercapacitor electrode accelerated ionic diffusion, adsorption energy, redox reaction reversibility. As result, Cu-MO@GFF presents excellent mass capacitance (534 F g-1), high rate performance (266 g-1 at 10 A good cycle (96.9% capacitive retention after 20,000 cycles) 6 mol L-1 (M) KOH electrolyte. In addition, Cu-MO@GFF-based solid-state FSC delivers energy density (11.875 Wh kg-1), much-improved cyclic stability, bending capability. On account behavior, this can flexibly power various wearable devices (such luminous tags, bracelets, watches), which will offer new avenue for innovating next-generation devices.

Language: Английский

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