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Hierarchical hollow structure with unique interfacial properties holds great potential for microwave absorption (MA). Ti3C2Tx MXene has been a hot topic due to rich interface structure, abundant defects, and functional groups. However, its overhigh permittivity and poor aggregation‐resistance limit the further application. Herein, a hierarchical MXene‐based hollow microsphere is prepared via a facile...
Chronic wound healing is an important and basic issue in medical and healthcare fields. Recently, stimuli‐responsive hydrogel systems have emerged as promising drug delivery carriers for wound management. However, given to the limited therapeutic outcomes, new hydrogel systems for efficient wound treatment are urgently needed. Here, the development of a 2D MXene‐based hydrogel system for highly efficient...
The commercialization of MXenes as anodes for lithium‐ion batteries is largely impeded by low initial coulombic efficiency (ICE) and unfavorable cycling stability, which are closely associated with defects such as Ti vacancies (VTi) in Ti3C2 MXenes. Herein, an effective strategy is developed to deactivate VTi defects by in situ growing Al2O3 nanoclusters on MXenes to alleviate the irreversible electrolyte...
Reversible electrochemical intercalation of cations into the interlayer space of 2D materials induces tunable physical and chemical properties in them. In MXenes, a large class of recently developed 2D carbides and nitrides, low intercalation energy, high storage capacitance, and reversible intercalation of various cations have led to their improved performance in sensing and energy storage applications...
For quick disinfection treatment, phototherapy, including photothermal therapy and photodynamic therapy, has emerged as a promising alternative to conventional methods. However, the bactericidal effect of phototherapy, which only works upon light, is short‐lived. The remaining bacteria in situ may repopulate when the irradiation of light is withdrawn. To address this refractory concern, an antibacterial...
It is extremely important to develop a high energy density power source with rapid charge–discharge rate to meet people's growing needs. Hence, the development of advanced electrode materials is the top priority. Herein, a simple yet elaborate vacuum‐assisted room‐temperature phase transfer method is reported to transform MXene nanosheets from water into organic solution. Subsequently, an in‐situ...
Atomically dispersed metal sites (ADMSs) attract immense attention because they can be used in the fields of energy and environmental protection as they are characterized by high atomic utilization efficiency and exhibit high activity. Various supports for anchoring isolated metal atoms are developed to construct ADMSs characterized by highly stable and well‐defined structures. This can be achieved...
As nanomaterials are becoming a key component in various electronics, 2D nanomaterials are emerging and attracting tremendous attention in the scientific community due to their unique physical, chemical, and structural properties. In recent years, a new family of 2D carbides and nitrides, known as MXenes, has become the center of attention for many electrochemical energy storage and conversion systems...
Layered MXene films have shown enormous potential for wide applications due to their high electrical conductivity and unique laminated microstructure. However, the intrinsic susceptibility to oxidation and the mechanical fragility of MXene films are the two major bottlenecks that prevent their widespread industrial applications. Here, a facile yet efficient assembly strategy is proposed to address...
Electromagnetic Interference Shielding
In article number 2200829, Dong Yang and co‐workers develop a gelation‐assisted assembly strategy to produce large‐area, environmentally‐stable MXene films with excellent trade‐off between mechanical and electrical performances, which endow resultant MXene films with outstanding electromagnetic interference shielding effectiveness with long‐term durability.
Rechargeable zinc‐ion batteries (ZIBs) with exceptional theoretical capacity have garnered significant interest in large‐scale electrochemical energy storage devices due to their low cost, abundant material, inherent safety, high specific energy, and ecofriendly nature. Metal carbides/nitrides, known as MXenes, have emerged as a large family of 2D transition metal carbides or carbonitrides with excellent...
With the rapid advancements of portable and wearable equipment, high‐efficiency electromagnetic interference (EMI) shielding materials are highly entailed to eliminate radiated electromagnetic pollution. Herein, by assembling hexagonal SrFe12O19 flakes into a Ti3C2Tx MXene/MWCNT substrate, a magnetized Ti3C2Tx‐based film is successfully fabricated by a facile filtration approach. Carbon nanotubes...
MXenes, as a 2D planar structure nanomaterial, were first reported in 2011. Due to their large specific surface area, high ductility, high electrical conductivity, strong hydrophilic surface, and high mechanical flexibility, MXenes have been extensively explored in the development of various functional materials with desired performances. This review is aimed to summarize the current progress in synthesis,...
Interface engineering is one of the promising strategies for the long‐term stabilization of perovskite solar cells (PSCs), preventing chemical decomposition induced by external agents and promoting fast charge transfer. Recently, MXenes–2D structured transition metal carbides and nitrides with various functionalization (O, ‐F, ‐OH) have demonstrated high potential for mastering the work function...
Catalysis is regarded as an effective strategy to fundamentally increase sulfur utilization, accelerating the kinetics of the transformation between lithium polysulfides (LiPSs) and lithium sulfide (Li2S) on a substrate. However, the intermodulation of catalysts and sulfur species is elusive, which is limited to the comprehensive analysis of electrochemical performance in the dynamic reaction process...
Owing to their rich surface chemistry, high conductivity, tunable bandgap, and thermal stability, structured 2D transition‐metal carbides, nitrides, and carbonitrides (MXenes) with modulated atomic environments have emerged as efficient electrochemical energy conversion systems in the past decade. Herein, the most recent advances in the engineering of tunable structured MXenes as a powerful new platform...
Room‐temperature sodium‐sulfur (RT‐Na‐S) batteries are attracting increased attention due to their high theoretical energy density and low‐cost. However, the traditional RT‐Na‐S batteries assembled with glass fiber (GF) separators are still hindered by the polysulfide shuttle effect and sodium dendrite growth, limiting the battery's capacity and cycling stability. Here, a facile and effective method...
MXene Synthesis
In article number 2203767, Chong‐Min Koo and co‐workers show that a high temperature non‐aqueous synthesis of Ti3C2Tx can significantly enhance the reaction rate and yield of delaminated MXene flakes with high quality. Additionally, Ti3C2Tx prepared by this method is covered with more F‐terminations and exhibits high tensile strength. These findings offer new opportunities towards...
2D transition metal carbides or nitrides (MXenes) have attracted considerable attention from materials scientists and engineers owing to their physicochemical properties. Currently, MXenes are synthesized from MAX‐phase precursors using aqueous HF. Here, in order to enhance the production of MXenes, an anhydrous etching solution is proposed, consisting of dimethylsulfoxide as solvent with its high...
The low utilization rate of active materials, shuttle effect of lithium polysulfides (LiPSs), and slow reaction kinetics lead to the extremely low efficiency and poor high current cycle stability of lithium sulfur batteries (Li–S batteries). In this paper, a self‐supporting multicomponent hierarchical network aerogel is proposed as the modified cathode (S/GO@MX@VS4). It consists of graphene (GO) and...
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