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Rechargeable Magnesium Batteries
In article number 2202250, Hong‐Yi Li, Xie Zhang, and co‐workers reveal the function of Mg2+ as a key to unlock the nano‐highways for Mg2+ diffusion in lamellar‐structured Cu3V2O7(OH)2·2H2O (CVOH). The Mg2+ self‐induced diffusion highways enable high specific capacity, excellent rate capability, and cycling stability of CVOH as a cathode for rechargeable magnesium...
Macrophages play essential roles in the progression of rheumatoid arthritis (RA), which are polarized into the pro‐inflammatory M1 phenotype with significant oxidative stress and cytokines excretion. Herein, an active targeting nanomedicine based on metal‐organic frameworks (MOFs) to re‐educate the diseased macrophages for RA therapy is reported. The MOFs are prepared via coordination between tannic...
Autophagy
To overcome the autophagy compromised mechanism of protective cellular processes by “eating” damaged organelles or potentially toxic materials in tumor cells, Nan Li and co‐workers show how tellurium double‐headed nanobullets (TeDNBs)‐HO is utilized to induce autophagy dysfunction. On the one hand, TeDNBs‐mediated endoplasmic reticulum stress could excessively induce autophagy; thus, resulting...
WS2 anode materials show huge potential for fast‐charging lithium‐ion batteries (LIBs) due to the naturally good 2D diffusion pathways but suffer from large Li+ diffusion barrier energy and poor intrinsic electrical conductivity. Here, a defect‐rich atomic‐scale laminated structure of WS2 and C (D‐WS2‐C) with O doping and enlarged interlayer distance from 0.62 to 1.06 nm of WS2 is first fabricated,...
In vivo, natural biomaterials are frequently anisotropic, exhibiting directional microstructures and mechanical properties. It remains challenging to develop such anisotropy in synthetic materials. Here, a facile one‐step approach for in situ fabrication of hydrogels with hierarchically anisotropic architectures and direction‐dependent mechanical properties is proposed. The anisotropic hydrogels,...
The rapid transport of alkali ions in electrodes is a long‐time dream for fast‐charging batteries. Though electrode nanostructuring has increased the rate‐capability, its practical use is limited because of the low tap density and severe irreversible reactions. Therefore, development of a strategy to design fast‐charging micron‐sized electrodes without nanostructuring is of significant importance...
The all‐inorganic lead‐free Cu‐based halide perovskites represented by the Cs−Cu−I system, have sparked extensive interest recently due to their impressive photophysical characteristics. However, successive works on their potential application in light emission diodes and photodetectors rely on tiny polycrystals, in which the grain boundaries and defects may lead to the performance degradation of...
In this work, the synthesis and characterization of ultrathin metal oxide, called biotene, using liquid‐phase exfoliation from naturally abundant biotite are demonstrated. The atomically thin biotene is used for energy harvesting using its flexoelectric response under multiple bending. The effective flexoelectric response increases due to the presence of surface charges, and the voltage increases...
Fine‐tuning the crystallinity and self‐aggregation features of donors/acceptor materials toward high‐efficiency organic solar cells (OSCs) is of crucial importance. Here, a convenient yet effective way to simultaneously control the crystallinity and self‐aggregation of the fused ring electron acceptor (FREA) is demonstrated by altering the length of the first‐position branched alkyl chain on the cyclic...
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...
The notorious growth of lithium (Li) dendrites and the instability of the solid electrolyte interface (SEI) during cycling make Li metal anodes unsuitable for use in commercial Li‐ion batteries. Herein, the use of simple sugar coating (α‐d‐glucose) is demonstrated on top of Li metal to halt the growth of Li dendrites and stabilize the SEI. The α‐d‐glucose layer possesses high surface and adhesive...
The treatment of diabetic wounds remains challenging due to the excess levels of oxidative stress, vulnerability to bacterial infection, and persistent inflammation response during healing. The development of hydrogel wound dressings with ideal anti‐inflammation, antioxidant, and anti‐infective properties is an urgent clinical requirement. In the present study, an injectable thermosensitive niobium...
UV Photodetectors
In article number 2201715, Qi Zhang and co‐workers propose the epitaxial growth of 2D all‐inorganic lead‐free Cs3Cu2I5 perovskites down to a thickness of 10 nm. The radiative transition of self‐trapped excitons is responsible for a strong blue emission, associated with a large Stocks shift and microsecond decay time. Their appealing UV sensitivity endows the development of green...
Hydrogen, a new energy carrier that can replace traditional fossil fuels, is seen as one of the most promising clean energy sources. The use of renewable electricity to drive hydrogen production has very broad prospects for addressing energy and environmental problems. Therefore, many researchers favor electrolytic water due to its green and low‐cost advantages. The electrolytic water reaction comprises...
Silicon monoxide (SiO)‐based materials have great potential as high‐capacity anode materials for lithium‐ion batteries. However, they suffer from a low initial coulombic efficiency (ICE) and poor cycle stability, which prevent their successful implementation into commercial lithium‐ion batteries. Despite considerable efforts in recent decades, their low ICE and poor cycle stability cannot be resolved...
The ability to craft high‐efficiency and non‐precious bifunctional oxygen catalysts opens an enticing avenue for the real‐world implementation of metal‐air batteries (MABs). Herein, Co3O4 encapsulated within nitrogen defect‐rich g‐C3N4 (denoted Co3O4@ND‐CN) as a bifunctional oxygen catalyst for MABs is prepared by graphitizing the zeolitic imidazolate framework (ZIF)‐67@ND‐CN. Co3O4@ND‐CN possesses...
Rechargeable lithium metal batteries (LMBs) are deemed as a viable solution to improve the power and/or energy density of the contemporary lithium‐ion batteries (LIBs). However, poor Li‐ion diffusivity within high‐energy cathodes causes sluggish kinetics of the corresponding redox reactions particularly at high C‐rates, thereby largely impeding the performance of rechargeable LMBs. In this work, a...
Herein, a strategy of synergetic dual‐metal‐ion centers to boost transition‐metal‐based metal organic framework (MOF) alloy nanomaterials as active oxygen reduction reaction (ORR) electrocatalysts for efficient hydrogen peroxide (H2O2) generation is proposed. Through a facile one‐pot wet chemical method, a series of MOF alloys with unique Ni–M (M–Co, Cu, Zn) synergetic centers are synthesized, where...
The enormous overpotential caused by sluggish kinetics of the oxygen reduction reaction and the oxygen evolution reaction prevents the practical application of Li–O2 batteries. The recently proposed light‐assisted strategy is an effective way to improve round‐trip efficiency; however, the high‐potential photogenerated holes during the charge would degrade the electrolyte with side reactions and poor...
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