Ordered Mesoporous Carbon Grafted MXene Catalytic Heterostructure as Li-Ion Kinetic Pump toward High-Efficient Sulfur/Sulfide Conversions for Li–S Battery

ACS Nano, Journal Year: 2023, Volume and Issue: 17(2), P. 1653 - 1662

Published: Jan. 6, 2023

Lithium–sulfur (Li–S) batteries exhibit unparalleled theoretical capacity and energy density than conventional lithium ion batteries, but they are hindered by the dissatisfactory "shuttle effect" sluggish conversion kinetics owing to low transport kinetics, resulting in rapid fading. Herein, a catalytic two-dimensional heterostructure composite is prepared evenly grafting mesoporous carbon on MXene nanosheet (denoted as OMC-g-MXene), serving interfacial kinetic accelerators Li–S batteries. In this design, grafted can not only prevent stack of nanosheets with enhanced mechanical property also offer facilitated pump for accelerating diffusion. Meanwhile, exposed defect-rich OMC-g-MXene inhibits polysulfide shuttling chemical interactions between polysulfides thus simultaneously enhances electrochemical efficiency, fully investigated situ/ex situ characterizations. Consequently, cells pumps achieve high cycling (966 mAh g–1 at 0.2 C after 200 cycles), superior rate performance (537 5 C), an ultralow decaying 0.047% per cycle 800 cycles 1 C. Even employed sulfur loading 7.08 mg cm–2 under lean electrolyte, ultrahigh areal 4.5 acquired, demonstrating future practical application.

Language: Английский

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Recent progress of MOF/MXene-based composites: Synthesis, functionality and application

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 490, P. 215208 - 215208

Published: May 18, 2023

Language: Английский

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Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: March 15, 2023

Abstract Since the discovery in 2011, MXenes have become rising star field of two-dimensional materials. Benefiting from metallic-level conductivity, large and adjustable gallery spacing, low ion diffusion barrier, rich surface chemistry, superior mechanical strength, exhibit great application prospects energy storage conversion, sensors, optoelectronics, electromagnetic interference shielding biomedicine. Nevertheless, two issues seriously deteriorate further development MXenes. One is high experimental risk common preparation methods such as HF etching, other difficulty obtaining with controllable groups. Recently, Lewis acidic a brand-new strategy for MXenes, has attracted intensive attention due to its safety ability endow uniform terminations. However, comprehensive review etching method not been reported yet. Herein, we first introduce following four aspects: mechanism, terminations regulation, in-situ formed metals delamination multi-layered Further, applications MXene-based hybrids obtained by route sensors microwave absorption are carefully summarized. Finally, some challenges opportunities also presented.

Language: Английский

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Emerging carbon-based quantum dots for sustainable photocatalysis

Green Chemistry, Journal Year: 2022, Volume and Issue: 25(1), P. 32 - 58

Published: Nov. 19, 2022

This review focuses on the applications of emerging carbon-based QD materials ( i.e. , GQDs, CNQDs, MQDs, and GDQDs) in sustainable photocatalysis.

Language: Английский

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Recent advances of MXenes Mo2C-based materials for efficient photocatalytic hydrogen evolution reaction

Carbon letters, Journal Year: 2022, Volume and Issue: 33(5), P. 1381 - 1394

Published: Sept. 18, 2022

Language: Английский

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Ligand chemistry for surface functionalization in MXenes: A review

EcoMat, Journal Year: 2023, Volume and Issue: 5(10)

Published: July 19, 2023

Abstract Surface chemistry of MXenes is significant interest due to its potential control their final optoelectronic and physicochemical properties, address the oxidation dispersion stabilities MXenes. can be manipulated by either MXene synthesis via chemical etching or post surface functionalization method. Although numerous reviews have explored methods, there has been a lack focus on functionalization. This review aims fill this gap summarizing recent advancements in chemistry, elucidating mechanisms, future perspectives functionalized We discuss organic ligand molecules, such as salts, catechols, phosphonates, carboxylates, silanes, which employed surface‐functionalize through covalent non‐covalent bond interaction. comprehensive offers valuable insights for scientists engineers utilizing across diverse applications, including EMI shielding, energy storage, electronics, optoelectronics, sensors. image

Language: Английский

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Large‐Scale, Mechanically Robust, Solvent‐Resistant, and Antioxidant MXene‐Based Composites for Reliable Long‐Term Infrared Stealth

Advanced Science, Journal Year: 2024, Volume and Issue: 11(17)

Published: Feb. 25, 2024

MXene-based thermal camouflage materials have gained increasing attention due to their low emissivity, however, the poor anti-oxidation restricts potential applications under complex environments. Various modification methods and strategies, e.g., addition of antioxidant molecules fillers been developed overcome this, but realization long-term, reliable using MXene network (coating) with excellent comprehensive performance remains a great challenge. Here, hybrid comodified hyaluronic acid (HA) hyperbranched polysiloxane (HSi) is designed fabricated. Notably, presence appreciated HA oxidation sheets without altering infrared stealth performance, superior other water-soluble polymers; while HSi can act as efficient cross-linking agents generate strong interactions between molecules. The optimized MXene/HA/HSi composites exhibit mechanical flexibility (folded into crane structure), good water/solvent resistance, long-term stable capability (with emissivity ≈0.29). reliability (≈8 months) various outdoor weathers scalable coating MXene-coated textile enable them disguise IR signal targets in environments, indicating promise achieved material for camouflage, stealth, counter surveillance.

Language: Английский

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Mo-based MXenes: Synthesis, properties, and applications

Advances in Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 324, P. 103077 - 103077

Published: Jan. 4, 2024

Language: Английский

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Lewis acid molten salt method for 2D MXene synthesis and energy storage applications: A review

Energy storage materials, Journal Year: 2023, Volume and Issue: 63, P. 102977 - 102977

Published: Sept. 21, 2023

Language: Английский

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Ultrathin MXene nanosheet-based TiO2/CdS heterostructure as a photoelectrochemical sensor for detection of CEA in human serum samples

Biosensors and Bioelectronics, Journal Year: 2023, Volume and Issue: 230, P. 115287 - 115287

Published: March 31, 2023

Language: Английский

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