Interface Engineering via Ti3C2Tx MXene Electrolyte Additive toward Dendrite-Free Zinc Deposition

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

Published: March 8, 2021

Abstract Zinc metal batteries have been considered as a promising candidate for next-generation due to their high safety and low cost. However, practical applications are severely hampered by the poor cyclability that caused undesired dendrite growth of metallic Zn. Herein, Ti 3 C 2 T x MXene was first used electrolyte additive facilitate uniform Zn deposition controlling nucleation process Such additives can not only be absorbed on foil induce initial via providing abundant zincophilic-O groups subsequently participate in formation robust solid-electrolyte interface film, but also accelerate ion transportation reducing 2+ concentration gradient at electrode/electrolyte interface. Consequently, MXene-containing realizes dendrite-free plating/striping with Coulombic efficiency (99.7%) superior reversibility (stably up 1180 cycles). When applied full cell, Zn-V O 5 cell delivers significantly improved cycling performances. This work provides facile yet effective method developing reversible zinc batteries.

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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2D materials and heterostructures for photocatalytic water-splitting: a theoretical perspective

Journal of Physics D Applied Physics, Journal Year: 2022, Volume and Issue: 55(29), P. 293002 - 293002

Published: Feb. 22, 2022

Abstract Photocatalytic water-splitting for hydrogen generation by sunlight provides a new route to address energy and environmental problems. In recent years, tremendous efforts have been devoted designing highly efficient photocatalysts (PCs). Adequate light absorption, effective photogenerated carrier separation, sufficiently large overpotentials water redox are crucial in achieving high solar-to-hydrogen (STH) efficiency. These parameters thus strongly influence the design of novel photocatalytic materials. Two-dimensional (2D) PCs flourished because their specific surface area ratio, short migration distance compared bulk PCs, enormous flexibility via van der Waals heterostructure (HS) engineering many other unique capabilities that meet criteria high-efficiency STH conversion. this review, we summarize developments 2D materials HSs applications from theoretical perspective. Specifically, first discuss number employed water-splitting. We review various strategies material modulate enhance performance improving harvesting such as introduction defects dopants, application strain, external electric field, rotation angles ferroelectric switching. then methods evaluate evolution reaction, oxygen reaction Finally, opportunities challenges presented.

Language: Английский

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The Many Deaths of Supercapacitors: Degradation, Aging, and Performance Fading

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(29)

Published: June 16, 2023

Abstract High‐performance electrochemical applications have expedited the research in high‐power devices. As such, supercapacitors, including electrical double‐layer capacitors (EDLCs) and pseudocapacitors, gained significant attention due to their high power density, long cycle life, fast charging capabilities. Yet, no device lasts forever. It is essential understand mechanisms behind performance degradation aging so that these bottlenecks can be addressed tailored solutions developed. Herein, factors contributing of electrode materials, electrolytes, other aspects system, such as pore blocking, compositions, functional groups, corrosion current collectors are examined. The monitoring characterizing methods, situ, ex situ techniques explored. In addition, different types electrolytes materials effects from an industrial application standpoint analyzed. Next, how degradations electrolyte decompositions lead failure, composition, affect device's lifespan Finally, future directions challenges for reducing supercapacitors' degradation, developing new methods devices summarized.

Language: Английский

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Strongly Coupled 2D Transition Metal Chalcogenide-MXene-Carbonaceous Nanoribbon Heterostructures with Ultrafast Ion Transport for Boosting Sodium/Potassium Ions Storage

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

Published: April 22, 2021

Unique "Janus" interfacial assemble strategy of 2D MXene nanosheets was proposed firstly. Ternary heterostructure consisting high capacity transitional metal chalcogenide, conductive and N rich fungal carbonaceous matrix achieved for larger radius Na/K ions storages. The highly accessible surfaces interfaces the strongly coupled based ternary heterostructures provide superb surficial pseudocapacitive storages both Na K with low energy barriers verified. Combining advantages two-dimensional (2D) nanomaterials, MXenes have shown great potential in next generation rechargeable batteries. Similar other materials, generally suffer severe self-agglomeration, capacity, unsatisfied durability, particularly sodium/potassium ions, compromising their practical values. In this work, a novel self-assembled from transition selenides (MSe, M = Cu, Ni, Co), N-rich nanoribbons (CNRibs) ultrafast ion transport properties is designed sluggish sodium-ion (SIB) potassium-ion (PIB) Benefiting diverse chemical characteristics, positively charged MSe anchored onto electronegative hydroxy (-OH) functionalized through electrostatic adsorption, while fungal-derived CNRibs bonded side amino bridging hydrogen bonds. This unique MXene-based prevents restacking increases intrinsic conductivity, most importantly, provides pathways extra storage sites, thus, boosts high-rate performances SIB PIB applications. Both quantitatively kinetic analysis density functional theory (DFT) calculations revealed that several orders higher than pristine MXenes, which delivered much enhanced

Language: Английский

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One‐Pot Green Process to Synthesize MXene with Controllable Surface Terminations using Molten Salts

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(52), P. 27013 - 27018

Published: Oct. 9, 2021

Surface terminations of two-dimensional MXene (Ti3 C2 Tx ) considerably impact its physicochemical properties. Commonly used etching methods usually introduce -F surface or metallic impurities in MXene. We present a new molten-salt-assisted electrochemical method to synthesize fluorine-free Ti3 Cl2 . Using electrons as reaction agents, cathode reduction and anode can be spatially isolated; thus, no metallics are the product. The situ modified from -Cl -O and/or -S, which shortens modification steps enriches variety terminations. obtained -O-terminated excellent electrode materials for supercapacitors, exhibiting capacitances 225 F g-1 at 1.0 Ag-1 , good rate performance (91.1 % 10 ), capacitance retention (100 after 10000 charge/discharge cycles is superior multi-layered prepared by other methods.

Language: Английский

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Exploration in materials, electrolytes and performance towards metal ion (Li, Na, K, Zn and Mg)-based hybrid capacitors: A review

Nano Energy, Journal Year: 2021, Volume and Issue: 86, P. 106070 - 106070

Published: April 21, 2021

Language: Английский

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Synchronously manipulating Zn2+ transfer and hydrogen/oxygen evolution kinetics in MXene host electrodes toward symmetric Zn-ions micro-supercapacitor with enhanced areal energy density

Energy storage materials, Journal Year: 2021, Volume and Issue: 40, P. 10 - 21

Published: May 15, 2021

Language: Английский

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Synthesis and nano-engineering of MXenes for energy conversion and storage applications: Recent advances and perspectives

Coordination Chemistry Reviews, Journal Year: 2021, Volume and Issue: 454, P. 214339 - 214339

Published: Dec. 15, 2021

Language: Английский

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Surface Selenization Strategy for V₂CT_x MXene toward Superior Zn-Ion Storage

ACS Nano, Journal Year: 2022, Volume and Issue: 16(2), P. 2711 - 2720

Published: Feb. 3, 2022

MXenes are promising cathode materials for aqueous zinc-ion batteries (AZIBs) owing to their layered structure, metallic conductivity, and hydrophilicity. However, they suffer from low capacities unless subjected electrochemically induced second phase formation, which is tedious, time-consuming, uncontrollable. Here we propose a facile one-step surface selenization strategy realizing advanced MXene-based nanohybrids. Through the process, metal atoms of converted transition selenides (TMSes) exhibiting high capacity excellent structural stability, whereas inner layers purposely retained. This applicable various MXenes, as demonstrated by successful construction VSe2@V2CTx, TiSe2@Ti3C2Tx, NbSe2@Nb2CTx. Typically, VSe2@V2CTx delivers high-rate capability (132.7 mA h g-1 at 2.0 A g-1), long-term cyclability (93.1% retention after 600 cycles capacitive contribution (85.7% mV s-1). Detailed experimental simulation results reveal that superior Zn-ion storage attributed engaging integration V2CTx VSe2, not only significantly improves diffusion coefficient 4.3 × 10-15 3.7 10-13 cm2 s-1 but also provides sufficient stability cycling. study offers approach development high-performance metal-ion batteries.

Language: Английский

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