Two-dimensional MXenes for flexible energy storage devices

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(10), P. 4191 - 4250

Published: Jan. 1, 2023

The design strategies and internal mechanisms of MXene-based materials in flexible energy storage devices are comprehensively introduced. Besides, the current trends, limitations, future outlooks proposed.

Language: Английский

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Rechargeable Metal-Sulfur Batteries: Key Materials to Mechanisms

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(8), P. 4935 - 5118

Published: April 10, 2024

Rechargeable metal-sulfur batteries are considered promising candidates for energy storage due to their high density along with natural abundance and low cost of raw materials. However, they could not yet be practically implemented several key challenges: (i) poor conductivity sulfur the discharge product metal sulfide, causing sluggish redox kinetics, (ii) polysulfide shuttling, (iii) parasitic side reactions between electrolyte anode. To overcome these obstacles, numerous strategies have been explored, including modifications cathode, anode, electrolyte, binder. In this review, fundamental principles challenges first discussed. Second, latest research on is presented discussed, covering material design, synthesis methods, electrochemical performances. Third, emerging advanced characterization techniques that reveal working mechanisms highlighted. Finally, possible future directions practical applications This comprehensive review aims provide experimental theoretical guidance designing understanding intricacies batteries; thus, it can illuminate pathways progressing high-energy-density battery systems.

Language: Английский

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MXenes: Versatile 2D materials with tailored surface chemistry and diverse applications

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 90, P. 253 - 293

Published: Dec. 5, 2023

Language: Английский

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Tuning the Local Coordination of CoP_1–xS_x between NiAs- and MnP-Type Structures to Catalyze Lithium–Sulfur Batteries

ACS Nano, Journal Year: 2023, Volume and Issue: 17(3), P. 3143 - 3152

Published: Jan. 30, 2023

The slow conversion and rapid shuttling of polysulfides remain major challenges that hinder the practical application lithium-sulfur (Li-S) batteries. Efficient catalysts are needed to accelerate suppress shuttling. However, lack a rational understanding catalysis poses obstacles design catalysts, thereby limiting development Li-S Herein, we theoretically analyze modulation electronic structure CoP1-xSx caused by NiAs-to-MnP-type transition its influence on catalytic activity. We found interacting d-orbitals active metal sites play determining role in adsorption catalysis, optimal dz2-, dxz-, dyz-orbitals an appropriately distorted five-coordinate pyramid enable higher activity compared with their parent structures. Finally, rationally designed S were electrospun into carbonized nanofibers form nanoreactor chains for use as cathodes. resultant batteries exhibited superior properties over 1000 cycles only decay rate 0.031% per cycle demonstrated high capacity 887.4 mAh g-1 at loading 10 mg cm-2. structural bonding analyses this study provide powerful approach catalysts.

Language: Английский

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MXene‐Based Anode‐Free Magnesium Metal Battery

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)

Published: June 1, 2023

Abstract Rechargeable magnesium batteries (RMBs) are promising next‐generation low‐cost and high‐energy devices. Among all RMBs, anode‐free metal that use in situ magnesium‐plated current collectors as negative electrodes can afford optimal energy densities. However, have remained elusive so far, their practical application is plagued by low Mg plating/stripping efficiency due to nonuniform deposition on conventional anode collectors. Herein, for the first time, an Mg‐metal battery developed employing a 3D MXene (Ti 3 C 2 T x ) film with horizontal electrodeposition. The magnesiophilic oxygen reactive fluorine terminations enable enriched local magnesium‐ion concentration durable fluoride‐rich solid electrolyte interphase Ti surface. Meanwhile, exhibits high lattice geometrical fit (≈96%) guide electrodeposition of Mg. Consequently, achieves reversible Coulombic efficiencies (>99.4%) at high‐current‐density (5.0 mA cm −2 high‐Mg‐utilization (50%) conditions. When this coupled pre‐magnesized Mo 6 S 8 cathode, full‐cell prototype volumetric density five times higher than its standard counterpart. This work provides insights into rational design batteries.

Language: Английский

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Multilevel Heterogeneous Interfaces Enhanced Polarization Loss of 3D-Printed Graphene/NiCoO₂/Selenides Aerogels for Boosting Electromagnetic Energy Dissipation

ACS Nano, Journal Year: 2024, Volume and Issue: 18(14), P. 10184 - 10195

Published: March 26, 2024

Heterointerface engineering is an attractive approach to modulating electromagnetic (EM) parameters and EM wave absorption performance. However, the weak interfacial interactions poor impedance matching would lead unsatisfactory performance due limitation of construction materials design strategies. Herein, multilevel heterointerface proposed by in situ growing nanosheet-like NiCoO2 selenides with abundant interface structures on 3D-printed graphene aerogel (GA) skeletons, which strengthens effect improves dielectric polarization loss. Benefiting from features substantially enhanced loss optimized matching, graphene/S-NiCoO2/selenides (G/S-NCO/Se) have achieved brilliant a strong reflection (RL) value −60.7 dB broad effective bandwidth (EAB) 8 GHz, about six times greater than that (−9.8 dB). Moreover, it further confirmed charge density differences off-axis electron holography large amount polarized accumulates at interface, leading significant relaxation behaviors. This work provides deep understanding heterogeneous loss, injects fresh infinite vitality for designing high-efficiency absorbers.

Language: Английский

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Balancing polysulfide containment and energy loss in lithium–sulfur batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(3), P. 1073 - 1082

Published: Jan. 1, 2024

Membrane modification may obstruct metal-ion mass flux, increasing battery overpotential and reducing performance. Balancing shuttle effect of separator-crossing species minimizing overpotential-induced energy loss is crucial.

Language: Английский

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One-step growth of ultrathin CoSe2 nanobelts on N-doped MXene nanosheets for dendrite-inhibited and kinetic-accelerated lithium–sulfur chemistry

Science Bulletin, Journal Year: 2024, Volume and Issue: 69(13), P. 2059 - 2070

Published: March 21, 2024

Language: Английский

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In-situ grown Ti3C2T @CoSe2 heterostructure as trapping-electrocatalyst for accelerating polysulfides conversion in lithium-sulfur battery

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145862 - 145862

Published: Sept. 4, 2023

Language: Английский

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CoSe2 nanoparticles-decorated carbon nanofibers as a hierarchical self-supported sulfur host for high-energy lithium-sulfur batteries

Science China Materials, Journal Year: 2023, Volume and Issue: 66(8), P. 3075 - 3083

Published: June 14, 2023

Language: Английский

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