Insights into 2D/2D MXene Heterostructures for Improved Synergy in Structure toward Next‐Generation Supercapacitors: A Review

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(18)

Published: Feb. 3, 2022

Abstract 2D interfacial heterostructures have found an unassailable status in energy storage systems, particularly supercapacitors citing the intriguing structural and electrochemical characteristics. Exactly a decade ago, MXene, promising transition metal carbide/nitride/carbonitride was to possess excellent conductivity, hydrophilicity, laudable charge opportunities, enriched surface functionalities conducive for with inherent challenging shortcomings. To substantially improve, assembled 2D/2D MXene exhibit commendable performance backed by fact of swift increase research interest. In this review, state‐of‐the‐art progress material design are investigated. Discussion is initially on fundamentals including synthesis governing properties. Particularly, different preparation electrostatic assembly, situ growth, hydrothermal treatment, objective specific strategies its implications elaborated. Especially, interface science, electrode–electrolyte interaction ion/electron dynamics synergistic enhancement MXene/rGO, MXene/LDH, MXene/metal sulfides timely investigations other architectures provided compatibility from solid‐state microsupercapacitors commerciality. conclude, well‐comprehended outlook, key challenges, prospective guidelines stretching fundamental mechanism electrolyte optimizations presented encourage advanced future generation supercapacitors.

Language: Английский

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High‐Capacity and Kinetically Accelerated Lithium Storage in MoO₃ Enabled by Oxygen Vacancies and Heterostructure

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(31)

Published: July 3, 2021

Abstract Molybdenum trioxide (MoO 3 ) has recently aroused intensive interest as a renowned conversion‐type anode of Li‐ion batteries (LIBs). Nevertheless, the inferior rate capability, sluggish reaction kinetics, and fast capacity decay during long‐term charge/discharge process seriously inhibits large‐scale commercial application. Herein, abundant oxygen vacancies MXene nanosheets are elaborately introduced into MoO nanobelts through hydrazine reduction electrostatic assembly to accelerate ionic electronic diffusion/transport kinetics for LIBs. Benefitting from accelerated ion diffusion enhanced electrical conductivity, additional active sites induced by well robust interfacial contact, prepared 3− x /MXene heterostructure exhibits excellent lithium‐ion storage performances. First‐principles calculations indicate that adsorption Li + conductivity significantly heterostructure. Thus, composite high reversible 1258 mAh g −1 at 0.1 A retains 474 10 , remarkably higher than those previously reported ‐based materials. More importantly, is fabricated with LiFePO 4 full LIB, which displays an unparalleled energy density 330 Wh kg .

Language: Английский

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Self‐Assembled Carbon Superstructures Achieving Ultra‐Stable and Fast Proton‐Coupled Charge Storage Kinetics

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(49)

Published: Oct. 7, 2021

Designing ingenious and stable carbon nanostructures is critical but still challenging for use in energy storage devices with superior electrochemistry kinetics, durable capacitive activity, high rate survivability. To pursue the objective, a simple self-assembly strategy developed to access superstructures built of nanoparticle embedded plates. The precursors, 2,4,6-trichloro-1,3,5-triazine 2,6-diaminoanthraquinone can form porous organic polymer "protic salt"-type rigid skeleton linked by -NH2 + Cl- - "rivets", which provides cornerstone hydrogen-bonding-guided backbone π-π plane stacking. ameliorative charge density distribution decreased adsorption as-fabricated allow accessibility build-in protophilic sites efficient ion diffusion low barrier. Such thus deliver ultra-stable fast proton-coupled kinetics at structural-chemical defects, contributing unprecedented lifespan (1 000 cycles), high-rate capability (100 A g-1 ) carbon-based supercapacitors, an ultrahigh (128 Wh kg-1 Zn-ion hybrid supercapacitors. self-assembled significantly improve all-round electrochemical performances, hold great promise storage.

Language: Английский

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Novel electrodes for supercapacitor: Conducting polymers, metal oxides, chalcogenides, carbides, nitrides, MXenes, and their composites with graphene

Journal of Alloys and Compounds, Journal Year: 2021, Volume and Issue: 893, P. 161998 - 161998

Published: Sept. 24, 2021

Language: Английский

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Every bite of Supercap: A brief review on construction and enhancement of supercapacitor

Journal of Energy Storage, Journal Year: 2022, Volume and Issue: 50, P. 104599 - 104599

Published: April 8, 2022

Language: Английский

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2D metal carbides and nitrides (MXenes) for sensors and biosensors

Biosensors and Bioelectronics, Journal Year: 2022, Volume and Issue: 205, P. 113943 - 113943

Published: Jan. 7, 2022

Language: Английский

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Freestanding Ti₃C₂T_x MXene/Prussian Blue Analogues Films with Superior Ion Uptake for Efficient Capacitive Deionization by a Dual Pseudocapacitance Effect

ACS Nano, Journal Year: 2021, Volume and Issue: 16(1), P. 1239 - 1249

Published: Dec. 23, 2021

Exploring and designing high-performance Faradaic electrode materials is of great significance to enhance the desalination performance hybrid capacitive deionization (HCDI). Herein, open freestanding films (MXene/Prussian blue analogues (PBAs), specifically, MXene/NiHCF MXene/CuHCF) were prepared by vacuum filtration a mixed solution PBAs nanoparticles Ti3C2Tx MXene dispersion directly used as HCDI electrodes. The conductive nanosheets bridge form three-dimensional (3D) network structure, which can accelerate salt ion electron diffusion/transport kinetics for HCDI. Additionally, prevent restacking nanosheets, expand their interlayer spacing, facilitate rapid diffusion storage ions. Benefiting from dual pseudocapacitance synergistic effect MXene, obtained MXene/PBAs show superior properties, with high capacity (85.1 mg g-1 film 80.4 MXene/CuHCF film) an ultrafast salt-removal rate, much higher than those other effect, adsorption Na+ ions, enhanced conductivity demonstrated through first-principles calculations. This paper offers simple convenient method design electrodes promotes development technology.

Language: Английский

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Self-Supporting, Binder-Free, and Flexible Ti₃C₂T_x MXene-Based Supercapacitor Electrode with Improved Electrochemical Performance

ACS Nano, Journal Year: 2022, Volume and Issue: 16(6), P. 9713 - 9727

Published: May 18, 2022

MXenes have shown great potential for supercapacitor electrodes due to their unique characteristics, but simultaneously achieving high capacitance, rate capability, and cyclic stability along with good mechanical flexibility is exceptionally challenging. Here, highly enhanced stability, as well T3C2Tx MXene-based are obtained by engineering the electrode structure, modifying surface chemistry, optimizing fabrication process via an optimized integration approach. This approach combines more importantly optimizes three methods that all require a calcination process: carbonizing in situ grown polymer ("Cpolymer") on MXene, alkali treatment ("A"), template sacrificing ("P"); processes lead abundant active sites, faster ion accessibility, better chemical flexibility. The P-MXene/Cpolymer-A binder-free self-supporting not only also demonstrate much larger capacitances performance than pristine MXene electrode. Specifically, P-MXene/CPAQ-A (PAQ: quinone-amine polymer) achieves capacitance of 532.9 F g-1 at 5 mV s-1, together superior improved (97.1% retention after 40 000 cycles 20 A g-1) compared (79.6% retention) P-MXene-A (77.3% electrodes. In addition, it discovered polymers can variously remove -F group removal effect be accumulated treatment.

Language: Английский

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Three‐Dimensional MXenes for Supercapacitors: A Review

Small Methods, Journal Year: 2022, Volume and Issue: 6(4)

Published: March 2, 2022

Supercapacitors have the characteristics of high power density and long cycle life, but low energy limits their further development. The 2D transitional metal carbides/nitrides (MXenes) show great application prospects in field supercapacitors due to superior volumetric capacitance, metallic-like conductivity, tunable surface terminations, structural advantages. However, like other materials, MXenes suffer from inevitable problem nanosheet restacking aggregation, which reduces overall active sites blocks accessibility electrolyte ions. transformation MXene nanosheets into 3D architectures is proven effective overcome problem. review briefly summarizes preparation strategies including template-assisted method, framework-assisted chemical assembly foaming methods with discussion centered on performances supercapacitors. Finally, an outlook current progress opportunities given highlight increasing popularity

Language: Английский

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Embedding NiS nanoflakes in electrospun carbon fibers containing NiS nanoparticles for hybrid supercapacitors

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 446, P. 137262 - 137262

Published: May 28, 2022

Language: Английский

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