Lattice Matching and Halogen Regulation for Synergistically Induced Uniform Zinc Electrodeposition by Halogenated Ti₃C₂ MXenes

ACS Nano, Journal Year: 2021, Volume and Issue: 16(1), P. 813 - 822

Published: Dec. 28, 2021

Dendrite growth and low Coulombic efficiency caused by uneven diffusion electrodeposition of Zn2+ ions have emerged as a barrier to exploit the Zn metal anode. In this work, we demonstrate stoichiometric halogenated MXenes (Ti3C2Cl2, Ti3C2Br2, Ti3C2I2) an artificial layer that can induce uniform deposition. The efficient redistribution effect results from coherent heterogeneous interface reconstruction regulated ion tiling halogen surficial termination. synergetic effects high lattice matching (90%) between adopted Zn, well positive regulation, are guided nucleate uniformly on most extensive (000l) crystal plane MXene matrix grow in planar manner. terms Cl termination is found be more effective than O/F, Br, I due its moderate adsorption coefficiency for ions. Ti3C2Cl2-Zn anode achieves life extension over 12 times (840 h at 2 mA cm-2//1 mAh cm-2) bare serves 9000 cycles battery with Ti3C2I2 cathode rate 3 A g-1. Given abundance parameters terminations materials, developed strategy expected extended other systems.

Language: Английский

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Covalent Organic Frameworks and Their Derivatives for Better Metal Anodes in Rechargeable Batteries

ACS Nano, Journal Year: 2021, Volume and Issue: 15(8), P. 12741 - 12767

Published: Aug. 5, 2021

Metal anodes based on a plating/stripping electrochemistry such as metallic Li, Na, K, Zn, Ca, Mg, Fe, and Al are recognized promising anode materials for constructing next-generation high-energy-density rechargeable metal batteries owing to their low electrochemical potential, high theoretical specific capacity, superior electronic conductivity, etc. However, inherent issues chemical reactivity, severe growth of dendrites, huge volume changes, unstable interface largely impede practical application. Covalent organic frameworks (COFs) derivatives emerging multifunctional have already well addressed the in past several years due abundant metallophilic functional groups, special inner channels, controllable structures. COFs can solve by interfacial modification, homogenizing ion flux, acting nucleation seeds, reducing corrosion anodes, so on. Nevertheless, related reviews still absent. Here we present detailed review batteries. Meanwhile, some outlooks opinions put forward. We believe catch eyes relevant researchers supply inspiration future research.

Language: Английский

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Recent progress in the design of advanced MXene/metal oxides-hybrid materials for energy storage devices

Energy storage materials, Journal Year: 2022, Volume and Issue: 53, P. 827 - 872

Published: Oct. 6, 2022

Language: Английский

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Recent status and future perspectives of 2D MXene for micro-supercapacitors and micro-batteries

Energy storage materials, Journal Year: 2022, Volume and Issue: 51, P. 500 - 526

Published: July 4, 2022

Language: Английский

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Coupling of Metallic VSe₂ and Conductive Polypyrrole for Boosted Sodium-Ion Storage by Reinforced Conductivity Within and Outside

ACS Nano, Journal Year: 2022, Volume and Issue: 16(5), P. 7772 - 7782

Published: April 19, 2022

Although transitional metal dichalcogenides have been regarded as appealing electrodes for sodium/potassium-ion batteries (SIBs/PIBs) owing to their high theoretical capacity, it is a key challenge realize dichalcogenide anodes with long-period cycling performance and high-rate capability because of poor conductivity large volumetric change. Herein, polypyrrole-encapsulated VSe2 nanoplates (VSe2@PPy) were prepared by the selenization VOOH hollow nanospheres subsequent in situ polymerization coating pyrrole. Benefiting from inherent metallicity VSe2, improvement structural protection provided PPy layer, VSe2@PPy exhibited enhanced sodium/potassium-storage performances, delivering superior rate capacity 260.0 mA h g-1 at 10 A SIBs 148.6 5 PIBs, well revealing an ultrastability 324.6 after 2800 cycles 4 SIBs. Moreover, insertion conversion mechanisms intermediates Na0.6VSe2, NaVSe2, VSe elucidated situ/ex X-ray diffraction combined ex transmission electron microscopy observation potentio-electrochemical impedance spectroscopy during sodiation desodiation processes. Density functional theory calculations show that strong coupling between not only causes stronger total density states built-in electric field, leading increased electrical conductivity, but also effectively decreases ion diffusion barrier.

Language: Английский

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Vertically Aligned MXene Nanosheet Arrays for High‐Rate Lithium Metal Anodes

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(18)

Published: March 18, 2022

Abstract Lithium (Li) metal is considered as one of the best anode materials due to its high theoretical capacity and low reduction potential. However, practical application restricted by uneven Li dendrite growth. Herein, vertically aligned Ti 3 C 2 T x MXene nanosheet arrays synthesized a facile ice template assisted blade coating method are adopted regulate nucleation guide deposition. This kind vertical structure exhibits tortuosity that can achieve homogeneous fast transport. In addition, rich F O groups on surface conducive formation uniform solid–electrolyte interphase layer, which plays an important role in regulating growth metal. Consequently, electrodes Coulombic efficiencies (98.8%) for more than 450 cycles at fixed areal 1.0 mAh cm −2 with current density mA . Moreover, it maintain stable lithium plating/striping behaviors even ultrahigh 5.0 Furthermore, full batteries (LiFePO 4 cathode) paired these show superior stability rate performance horizontally electrodes.

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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Functional MXene‐Based Materials for Next‐Generation Rechargeable Batteries

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(51)

Published: Aug. 9, 2022

Abstract MXenes are seen as an exceptional candidate to reshape the future of energy with their viable surface chemistry, ultrathin 2D structure, and excellent electronic conductivity. The extensive research efforts bring about rapid expansion MXene families enriched functionalities, which significantly boost performance existing energy‐storage devices. In this review, strategies that developed functionalize MXene‐based materials, including tailoring microstructure by ions/molecules/polymers‐initiated interaction or self‐assembly, surface/interface engineering dopants functional groups, constructing heterostructures from various transforming them into a series derivatives inheriting merits precursors highlighted. Their applications in emerging battery technologies demonstrated discussed. With delicate functionalization structural engineering, electrode materials exhibit improved specific capacity rate capability, presence further suppresses even eliminates dendrite formation on metal anodes, lengthens lifespan rechargeable batteries. Meanwhile, serve additives for electrolytes, separators, current collectors. Finally, some directions worth exploration address remaining challenging issues achieve next‐generation high‐power low‐cost batteries proposed.

Language: Английский

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Towards better Mg metal anodes in rechargeable Mg batteries: Challenges, strategies, and perspectives

Energy storage materials, Journal Year: 2022, Volume and Issue: 52, P. 299 - 319

Published: Aug. 10, 2022

Language: Английский

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Two-dimensional MXenes

MRS Bulletin, Journal Year: 2023, Volume and Issue: 48(3), P. 238 - 244

Published: March 1, 2023

Language: Английский

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