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The hierarchical Cu2S@NC@MoS3 heterostructures have been firstly constructed by the high‐capacity MoS3 and high‐conductive N‐doped carbon to co‐decorate the Cu2S hollow nanospheres. During the heterostructure, the middle N‐doped carbon layer as the linker facilitates the uniform deposition of MoS3 and enhances the structural stability and electronic conductivity. The popular hollow/porous structures...
Solution‐processed perovskite‐based light‐emitting diodes (PeLEDs) are promising candidates for low‐cost, large‐area displays, while severe deterioration of the perovskite light‐emitting layer occurs during deposition of electron transport layers from solution in an issue. Herein, core/shell ZnO/ZnS nanoparticles as a solution‐processed electron transport layer in PeLED based on quasi‐2D PEA2Csn−1...
Overcoming throughput challenges in current graphene defect healing processes, such as conventional thermal annealing, is crucial for realizing post‐silicon device fabrication. Herein, a new time‐ and energy‐efficient method for defect healing in graphene is reported, utilizing polymer‐assisted rapid thermal annealing (RTA). In this method, a nitrogen‐rich, polymeric “nanobandage” is coated directly...
Triple‐conducting (H+/O2−/e−) cathodes are a vital constituent of practical protonic ceramic fuel cells. However, seeking new candidates has remained a grand challenge on account of the limited material system. Though triple conduction can be achieved by mechanically mixing powders uniformly consisting of oxygen ion–electron and proton conductors, the catalytic activity and durability are still restricted...
Aluminum‐Ion Batteries
In article number 2203236, Hongsen Li and co‐workers develop a Sn‐based alloy (Co3Sn2) as a type of aluminum‐ion battery positive electrode, revealing a bimetallic activated center alloying reaction aluminum storage mechanism. Both Co and Sn act as activation centers and alloy with Al to generate AxSn and AlyCo, respectively, which is fundamentally different from what occurs...
Aluminum is the most abundant metal element in the Earth's crust, thus developing the rechargeable aluminum‐ion batteries (AIBs) provides an ideal opportunity to realize cells with pleasing energy‐to‐price ratios. However, the further development of AIBs is plagued by the scarcity of suitable positive electrode materials. Here, for the first time, a tin‐based alloy positive electrode material for...
Carbon dot (CD) based long‐lived afterglow emission materials have attracted attention in recent years, but demonstration of white‐light room‐temperature afterglow remains challenging, due to the difficulty of simultaneous generation of multiple long‐lived excited states with distinct chromatic emission. In this work, a white‐light room‐temperature long‐lived afterglow emission from a CD powder with...
The diversity by nano/microstructural material or device constructing can provide the exciting opportunity for sensitivity and selectivity to achieve facile and efficient multianalyte recognition for clinical diagnosis, environment monitoring, etc., in complex system analysis. Colloidal poly(styrene–methyl methacrylate–acrylic acid) (poly(St–MMA–AA)) nanoparticle‐assembled photonic crystals (PCs)...
To address the dendrite growth and interface instability of high‐capacity Li metal anode, heterogeneous seed‐decorated 3D host materials are expected to suppress the growth of Li dendrites. The physical stability and chemical reactivity of these nanoseeds are the decisive conditions for long cycling lithium metal batteries. Herein, carbon nanofibers decorated with uniform CrO0.78N0.48 nanoparticles...
Color‐saturated red light‐emitting diodes (LEDs) with emission wavelengths at around 620–640 nm are an essential part of high‐definition displays. Metal halide perovskites with very narrow emission linewidth are promising emitters, and rapid progress has been made in perovskite‐based LEDs (PeLEDs); however, the efficiency of the current color—pure red PeLEDs—still far lags behind those of other‐colored...
Sodium‐ion batteries have huge potential in large‐scale energy storage applications. Layered Fe‐based oxides are one of the desirable cathode materials due to abundance in the earth crust and high activity in electrochemical processes. However, Fe‐ion migration to Na layers is one of the major hurdles leading to irreversible structural degradation. Herein, it is revealed that distinct Fe‐ion migration...
Near‐infrared (NIR) emissive materials are highly attractive for fluorescence bio‐imaging application. In article number 1905050, Songnan Qu and co‐workers develop NIR absorbing/emissive carbon dots via microwave assisted exfoliation. More importantly, a unique thermally activated up‐conversion NIR emission is observed under 808 nm continuous‐wave laser excitation.
Upconversion near‐infrared (NIR) fluorescent carbon dots (CDs) are important for imaging applications. Herein, thermally activated upconversion photoluminescence (UCPL) in the NIR region, with an emission peak at 784 nm, which appears under 808 nm continuous‐wave laser excitation, are realized in the NIR absorbing/emissive CDs (NIR‐CDs). The NIR‐CDs are synthesized by microwave‐assisted exfoliation...
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