Transition metal nitrides for electrochemical energy applications

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 50(2), P. 1354 - 1390

Published: Dec. 10, 2020

This review comprehensively summarizes the progress on structural and electronic modulation of transition metal nitrides for electrochemical energy applications.

Language: Английский

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MXenes for polymer matrix electromagnetic interference shielding composites: A review

Composites Communications, Journal Year: 2021, Volume and Issue: 24, P. 100653 - 100653

Published: Jan. 21, 2021

Language: Английский

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Two-dimensional MXene-based and MXene-derived photocatalysts: Recent developments and perspectives

Chemical Engineering Journal, Journal Year: 2020, Volume and Issue: 409, P. 128099 - 128099

Published: Dec. 16, 2020

Language: Английский

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MXenes for Rechargeable Batteries Beyond the Lithium‐Ion

Advanced Materials, Journal Year: 2020, Volume and Issue: 33(1)

Published: Nov. 20, 2020

Abstract Research on next‐generation battery technologies (beyond Li‐ion batteries, or LIBs) has been accelerating over the past few years. A key challenge for these emerging batteries lack of suitable electrode materials, which severely limits their further developments. MXenes, a new class 2D transition metal carbides, carbonitrides, and nitrides, are proposed as materials due to several desirable attributes. These attributes include large tunable interlayer spaces, excellent hydrophilicity, extraordinary conductivity, compositional diversity, abundant surface chemistries, making MXenes promising not only but also other components in cells batteries. Herein, an overview assessment utilization rechargeable beyond LIBs, including alkali‐ion (e.g., Na + , K ) storage, multivalent‐ion Mg 2+ Zn Al 3+ presented. In particular, synthetic strategies properties that enable play various roles electrodes, anode protective layers, sulfur hosts, separator modification conductive additives discussed. Moreover, perspective future research directions MXene‐based ranging from material design processing, fundamental understanding reaction mechanisms, device performance optimization is provided.

Language: Английский

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Status and Prospects of MXene‐Based Lithium–Sulfur Batteries

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(21)

Published: March 5, 2021

Abstract Lithium–sulfur (Li–S) batteries with a theoretical energy density of 2567 Wh kg −1 are very promising next‐generation storage systems, but suffer from the insulativity sulfur and Li 2 S, shuttle effect due to dissolution migration polysulfides, lithium dendrite issue. MXenes, family 2D transition metal carbides/nitrides, which have metallic conductivity, structural variety, strong chemical adsorption ability effective catalytic for fast kinetics, inducing uniform growth Li, exhibit potential high‐performance Li–S batteries. In this review, recent progress achievements MXene‐based summarized, including use MXenes in cathode, interlayer between cathode separator, anode. The architecture construction modification as well hybridization other materials demonstrated. enhancement on electrochemical performance related mechanisms composites discussed. Finally, challenges perspectives battery application also given.

Language: Английский

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Carbon-Reinforced Nb₂CT_x MXene/MoS₂ Nanosheets as a Superior Rate and High-Capacity Anode for Sodium-Ion Batteries

ACS Nano, Journal Year: 2021, Volume and Issue: 15(4), P. 7439 - 7450

Published: March 23, 2021

Sodium-ion batteries operating at room temperature have emerged as a generation of energy storage devices to replace lithium-ion batteries; however, they are limited by lack anode materials with both an adequate lifespan and excellent rate capability. To address this issue, we developed Nb2CTx MXene-framework MoS2 nanosheets coated carbon (Nb2CTx@MoS2@C) constructed robust three-dimensional cross-linked structure. In such design, highly conductive MXene prevent the restacking sheets provide efficient channels for charge transfer diffusion. Additionally, hierarchical coating has certain level volume elasticity electrical conductivity guarantee intercalation sodium ions, facilitating fast kinetics long-term stability. As result, Nb2CTx@MoS2@C delivers ultrahigh reversible capacity 530 mA h g–1 0.1 A after 200 cycles very long cycling stability 403 only 0.01% degradation per cycle 2000 1.0 g–1. Moreover, outstanding retention approximately 88.4% from 1 in regard performance. Most importantly, can realize quick discharge current densities 20 or even 40 capacities 340 260 mAh g–1, respectively, which will increase number practical applications sodium-ion batteries.

Language: Английский

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3D Ultralight Hollow NiCo Compound@MXene Composites for Tunable and High-Efficient Microwave Absorption

Nano-Micro Letters, Journal Year: 2021, Volume and Issue: 13(1)

Published: Oct. 11, 2021

Abstract The 3D hollow hierarchical architectures tend to be designed for inhibiting stack of MXene flakes obtain satisfactory lightweight, high-efficient and broadband absorbers. Herein, the NiCo compound@MXene networks were prepared by etching ZIF 67 template subsequently anchoring Ti 3 C 2 T x nanosheets through electrostatic self-assembly. electromagnetic parameters microwave absorption property can distinctly or slightly regulated adjusting filler loading decoration nanoflakes. Based on synergistic effects multi-components special well-constructed structure, layered double hydroxides@Ti (LDHT-9) absorber remarkably achieves unexpected effective bandwidth (EAB) 6.72 GHz with a thickness 2.10 mm, covering entire Ku-band. After calcination, transition metal oxide@Ti (TMOT-21) near percolation threshold possesses minimum reflection loss (RL min ) value − 67.22 dB at 1.70 mm within only 5 wt%. This work enlightens simple strategy constructing MXene-based composites achieve absorbents lightweight tunable EAB."Image missing"

Language: Английский

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Three-Dimensional MOFs@MXene Aerogel Composite Derived MXene Threaded Hollow Carbon Confined CoS Nanoparticles toward Advanced Alkali-Ion Batteries

ACS Nano, Journal Year: 2021, Volume and Issue: 15(2), P. 3228 - 3240

Published: Jan. 28, 2021

MXene combining high metal-like conductivity, hydrophilicity, and abundant surface functional groups has been recognized as a class of versatile two-dimensional materials for many applications. However, the aggregation nanosheets from interlayer van der Waals force hydrogen bonds represents major problem that severely limits their practical use. Here, we report an aerogel structure MOFs@MXene, in which situ formed MOF particles can effectively prevent accumulation MXene, enabling three-dimensional (3D) hierarchical porous conductive network to be composed with ultralight feature. Subsequently, 3D threaded hollow CoS nanobox composite ((CoS NP@NHC)@MXene) derived MOFs@MXene precursor was synthesized, highly interconnected coupled ultrafine nanocrystallization electrochemically active phase yield hybrid system excellent electron ion transport properties. Benefiting synergistic effect components, (CoS NP@NHC)@MXene manifests outstanding electrochemistry properties electrode all lithium-ion batteries (LIBs), sodium-ion (SIBs), potassium-ion (PIBs). It demonstrated cycle stability capacities 1145.9 mAh g–1 at 1 A after 800 cycles 574.1 5 1000 LIBs, 420 2 650 SIBs, 210 500 PIBs. First-principle calculations confirmed could enhance charge transfer reaction kinetics, particularly interface. More importantly, rate performance under mass loading volumetric energy power density entire represent potential composites applications electrochemical storage devices. The synthesis method reported this Article is easily extended produce other MXene-aerogel-based various

Language: Английский

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Progress in 3D-MXene Electrodes for Lithium/Sodium/Potassium/Magnesium/Zinc/Aluminum-Ion Batteries

Electrochemical Energy Reviews, Journal Year: 2023, Volume and Issue: 6(1)

Published: March 1, 2023

Language: Английский

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MXenes for Solar Cells

Nano-Micro Letters, Journal Year: 2021, Volume and Issue: 13(1)

Published: Feb. 21, 2021

Abstract Application of two-dimensional MXene materials in photovoltaics has attracted increasing attention since the first report 2018 due to their metallic electrical conductivity, high carrier mobility, excellent transparency, tunable work function and superior mechanical property. In this review, all developments applications Ti 3 C 2 T x (here, it is noteworthy that there are still no reports on other MXenes’ application by far) as additive, electrode hole/electron transport layer solar cells detailedly summarized, meanwhile, problems existing related studies also discussed. view these problems, some suggestions given for pushing exploration cells. It believed review can provide a comprehensive deep understanding into research status and, moreover, helps widen new situation study MXenes photovoltaics.

Language: Английский

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