Defect engineering of two-dimensional materials for advanced energy conversion and storage

Chemical Society Reviews, Год журнала: 2023, Номер 52(5), С. 1723 - 1772

Опубликована: Янв. 1, 2023

Defective two-dimensional (2D) materials show huge potential for energy-related fields. This review overviews the formation/evolution mechanisms and engineering strategies of defects in 2D materials, which enable enhanced electrode reaction kinetics.

Язык: Английский

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Recent Advances on Dual‐Band Electrochromic Materials and Devices

Advanced Functional Materials, Год журнала: 2022, Номер 32(17)

Опубликована: Янв. 14, 2022

Dual-band electrochromism is a phenomenon where materials can independently regulate the transmittance of visible (VIS) and near-infrared (NIR) light. Owing to their bistability, low energy consumption, independent control over VIS NIR regions, dual-band electrochromic (EC) devices have been great significance fully harnessing light building an energy-saving society. The past several years witnessed efforts put in developing novel EC improve optical performance through altering composition, structural, physicochemical features, which determine behavior devices. In this review, concept, significance, working principle, key influence factors are briefly introduced. Next, up-to-date progress including inorganic, organic, composites summarized, with focus on material design, device fabrication, optimization. Finally, challenges perspectives also presented.

Язык: Английский

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Artificial Heterogeneous Interphase Layer with Boosted Ion Affinity and Diffusion for Na/K‐Metal Batteries

Advanced Materials, Год журнала: 2022, Номер 34(13)

Опубликована: Фев. 2, 2022

Metallic Na (K) are considered a promising anode materials for Na-metal and K-metal batteries because of their high theoretical capacity, low electrode potential, abundant resources. However, the uncontrolled growth dendrites severely damages stability electrode/electrolyte interface, resulting in battery failure. Herein, heterogeneous interface layer consisting metal vanadium nanoparticles sodium sulfide (potassium sulfide) is introduced on surface foil (i.e., Na2 S/V/Na or K2 S/V/K). Experimental studies calculations indicate that S/V (K2 S/V) protective can effectively improve (K)-ion adsorption diffusion kinetics, inhibiting during plating/stripping. Based novel design layer, symmetric cell displays long lifespan over 1000 h carbonate-based electrolyte, S/V/K operate 1300 at 0.5 mA cm-2 with capacity mAh . Moreover, full (Na3 V2 (PO4 )3 ||Na2 S/V/Na) exhibits energy density 375 Wh kg-1 power 23.5 kW The achievements support development layers other high-energy-density batteries.

Язык: Английский

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Molten Salts Etching Route Driven Universal Construction of MXene/Transition Metal Sulfides Heterostructures with Interfacial Electronic Coupling for Superior Sodium Storage

Advanced Energy Materials, Год журнала: 2022, Номер 12(39)

Опубликована: Авг. 25, 2022

Abstract The MXene‐based heterostructures have recently attracted great interest as anode materials for sodium‐ion batteries (SIBs). Nonetheless, the complicated and harsh preparation process impedes their further commercialization. Herein, a novel, safe, low‐destructive, universal strategy rationally fabricating Ti 3 C 2 T x MXene/transition metal sulfides (MS y ) is presented via Lewis acidic molten salts etching subsequent in situ sulfurization treatment. Benefiting from interfacial electronic coupling between highly conductive MXene (T = O Cl) MS (M Fe, Co Ni), possess remarkably improved conductivity, promoted Na + migration kinetics, robust architectures. As proof‐of‐concept demonstration, /FeS heterostructure demonstrates outstanding rate performance (456.6 mAh g −1 at 10 A long‐term cyclic stability (474.9 after 600 cycles 5 when serving SIB anodes. Impressively, full battery with delivers an excellent reversible capacity of 431.6 1000 . Moreover, dual sodium storage behavior underlying mechanism toward exceptional electrochemical are revealed by comprehensive characterizations theoretical calculations. Based on utilization salt products, present work offers new insight into fabrication heterostructures.

Язык: Английский

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

Energy storage materials, Год журнала: 2022, Номер 53, С. 827 - 872

Опубликована: Окт. 6, 2022

Язык: Английский

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A General Strategy for Engineering Single-Metal Sites on 3D Porous N, P Co-Doped Ti₃C₂T_X MXene

ACS Nano, Год журнала: 2022, Номер 16(3), С. 4116 - 4125

Опубликована: Фев. 21, 2022

Two-dimensional (2D) MXenes have been developed to stabilize single atoms via various methods, such as vacancy reduction and heteroatom-mediated interactions. However, anchoring on 3D porous further increase catalytic active sites thus construct electrocatalysts with high activity stability remains unexplored. Here, we reported a general synthetic strategy for engineering single-metal N, P codoped Ti3C2TX nanosheets. Through "gelation-and-pyrolysis" process, series of atomically dispersed metal catalysts (Pt, Ir, Ru, Pd, Au) supported by nanosheets structure can be obtained serve efficient the electrochemical hydrogen evolution reaction (HER). As result favorable electronic geometric N(O), P-coordinated optimizing intermediates adsorption exposing surface facilitating charge/mass transfer, as-synthesized Pt SA-PNPM catalyst shows ∼20-fold higher than commercial Pt/C HER over wide pH range.

Язык: Английский

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MXene-Based Aerogel Anchored with Antimony Single Atoms and Quantum Dots for High-Performance Potassium-Ion Batteries

Nano Letters, Год журнала: 2022, Номер 22(3), С. 1225 - 1232

Опубликована: Янв. 19, 2022

Rationally electronic structure engineering of nanocomposite electrodes shows great promise for enhancing the electrochemical performance rechargeable batteries. Herein, we report antimony single atoms and quantum dots (∼5 nm) codecorated Ti3C2Tx MXene-based aerogels (Sb SQ@MA) high-performance potassium-ion batteries (PIBs). We found that atomically dispersed Sb could modify Sb/Ti3C2Tx composite, improve charge transfer kinetics, enhance potassium storage capability at heterointerfaces. Additionally, aerogel with rich surface functional groups defects provides abundant anchoring sites endows composite reinforced structural stability highly efficient electron transfer. The high loading (∼60.3 wt %) short ionic transport pathways is desired reservoirs. These features synergistically rate cycling SQ@MA in PIBs. This work has demonstrated an enlightening technique to tailor interface activity heterostructured applications.

Язык: Английский

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Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Март 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.

Язык: Английский

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Phase Engineering of Defective Copper Selenide toward Robust Lithium–Sulfur Batteries

ACS Nano, Год журнала: 2022, Номер 16(7), С. 11102 - 11114

Опубликована: Июнь 27, 2022

The shuttling of soluble lithium polysulfides (LiPS) and the sluggish Li-S conversion kinetics are two main barriers toward practical application lithium-sulfur batteries (LSBs). Herein, we propose addition copper selenide nanoparticles at cathode to trap LiPS accelerate reaction kinetics. Using both computational experimental results, demonstrate crystal phase concentration vacancies control electronic structure selenide, its affinity chemisorption, electrical conductivity. adjustment defect density also allows for tuning electrochemically active sites catalytic polysulfide. optimized S/Cu1.8Se efficiently promotes stabilizes sulfur electrochemistry, thus improving significantly LSB performance, including an outstanding cyclability over 1000 cycles 3 C with a capacity fading rate just 0.029% per cycle, superb capability up 5 C, high areal 6.07 mAh cm-2 under loading. Overall, present work proposes engineering strategy fast durable demonstrating great potential in developing LSBs.

Язык: Английский

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Effect of Heterostructure‐Modified Separator in Lithium–Sulfur Batteries

Small, Год журнала: 2023, Номер 19(42)

Опубликована: Июнь 9, 2023

Lithium-sulfur (Li-S) batteries with high energy density and low cost are the most promising competitor in next generation of new reserve devices. However, there still many problems that hinder its commercialization, mainly including shuttle soluble polysulfides, slow reaction kinetics, growth Li dendrites. In order to solve above issues, various explorations have been carried out for configurations, such as electrodes, separators, electrolytes. Among them, separator contact both anode cathode is a particularly special position. Reasonable design-modified material can key problems. Heterostructure engineering modification method combine characteristics different materials generate synergistic effect at heterogeneous interface conducive Li-S electrochemical behavior. This review not only elaborates role heterostructure-modified separators dealing problems, but also analyzes improvement wettability thermal stability by heterostructure materials, systematically clarifies advantages, summarizes some related progress recent years. Finally, future development direction heterostructure-based given.

Язык: Английский

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