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Nanoporous Materials
In article number 2300697, Li Sheng, Hong Xu, Cheng Wang, Xiangming He, and co‐workers provide a method (i.e. electrospinning) to convert sulfonated polymers into high‐performance lithium battery separators. The nanofibrous Nafion separator swelled in liquid electrolytes has in situ generated nanochannels, efficiently accelerating lithium ion transport.
Sulfonated polymers have long been used as proton‐conducting materials in fuel cells, and their ionic transport features are highly attractive for electrolytes in lithium‐ion/metal batteries (LIBs/LMBs). However, most studies are still based on a preconceived notion of using them directly as polymeric ionic carriers, which precludes exploring them as nanoporous media to construct efficient lithium...
Electrocatalysts based on Fe and other transition metals are regarded as most promising candidates for accelerating the oxygen evolution reaction (OER), whereas whether Fe is the catalytic active site for OER is still under debate. Here, unary Fe‐ and binary FeNi‐ based catalysts, FeOOH and FeNi(OH)x, are produced by self‐reconstruction. The former is a dual‐phased FeOOH, possessing abundant oxygen...
Perovskite‐based photodetectors exhibit potential applications in communication, neuromorphic chips, and biomedical imaging due to their outstanding photoelectric properties and facile manufacturability. However, few of perovskite‐based photodetectors focus on ultraviolet‐visible‐short‐wavelength infrared (UV–Vis–SWIR) broadband photodetection because of the relatively large bandgap. Moreover, such...
Individual Perovskite Nanoplate Photodetectors
In article number 2301386, Lu Zhu, Shenghuang Lin, Haoran Mu, Zhanfeng Huang, and co‐workers design and fabricate an individual monocrystalline MAPbBr3 nanoplate‐based photodetector that simultaneously achieves efficient ultraviolet‐visible‐short‐wavelength infrared broadband photodetection and fast‐response. They find that perovskites with relatively...
Radiative cooling shows great promise in eco‐friendly space cooling due to its zero‐energy consumption. For subambient cooling in hot humid subtropical/tropical climates, achieving ultrahigh solar reflectance (≥96%), durable ultraviolet (UV) resistance, and surface superhydrophobicity simultaneously is critical, which, however, is challenging for most state‐of‐the‐art scalable polymer‐based coolers...
Inverted perovskite solar cells (IPSCs) have witnessed an impressive development in recent years. However, their efficiency is still significantly behind theoretical limits, and device instabilities hinder their commercialization. Two main obstacles to further enhancing their performance via one‐step deposition are: 1) the unsatisfactory film quality of perovskite and 2) the poor surface contact....
Uranium is a key element in the preparation of nuclear fuel. An electrochemical uranium extraction technique is proposed to achieve high efficiency uranium extraction performance through HER catalyst. However, it is still a challenge to design and develop a high‐performance hydrogen evolution reaction (HER) catalyst for rapid extraction and recovery of uranium from seawater. Herein, a bi‐functional...
Textiles with radiative cooling/warming capabilities provide a green and effective solution to personal thermal comfort in different climate scenarios. However, developing multiple‐mode textiles for wearing in changing climates with large temperature variation remains a challenge. Here a Janus textile is reported, comprising a polyethersulfone (PES)‐Al2O3 cooling layer optically coupled with a Ti3...
How to control the stability of oil‐in‐water (O/W) emulsions is one of the main topics for scientists working in colloidal systems. Recently, carbon dots (CDs) have received great interest as smart materials because of their excellent physicochemical properties and versatile applications. Herein, for the first time, advanced and switchable O/W emulsions are presented that are stabilized by the synergistic...
Silica nanoparticles (SiNPs) are one of the most common inorganic nanomaterials. Autophagy is the predominant biological response to nanoparticles and transcription factor EB (TFEB) is a master regulator of the autophagy–lysosome pathway. Previous studies show that SiNPs induce autophagosome accumulation, yet the precise underlying mechanisms remain uncertain. The present study investigates the role...
Aqueous zinc ion batteries (ZIBs) are regarded as one of the most ideally suited candidates for large‐scale energy storage applications owning to their obvious advantages, that is, low cost, high safety, high ionic conductivity, abundant raw material resources, and eco‐friendliness. Much effort has been devoted to the exploration of cathode materials design, cathode storage mechanisms, anode protection...
Although asymmetric supercapacitors (ASCs) can achieve high energy density, the lifespan and power density are severely suppressed due to the low conductivity of using pseudocapacitive or battery‐type electrode materials. Recently, nonporous conductive coordination polymers (c‐CPs) have sparked interests in supercapacitors. However, their performance is expected to be limited by the nonporous features,...
Doped Quantum Layers
In article number 2200454, Yuyu Bu, Xiaohui Guo, and co‐workers fabricate a photogenerated hole transfer tunnel in a photoanode system via doped quantum layers.
Surface passivation of the photoelectrode by wide bandgap semiconductor quantum layer is an important strategy to improve work stability and surface state inhibition. However, an inevitable energy barrier is generated during the quantum tunneling process of the photocarriers. To overcome this shortage, a tandem photo‐generated hole transfer route is fabricated on BiVO4 photoanode by doped dual‐quantum...
The charged species inside biofluids (blood, interstitial fluid, sweat, saliva, urine, etc.) can reflect the human body's physiological conditions and thus be adopted to diagnose various diseases early. Among all personalized health management applications, ion‐selective organic electrochemical transistors (IS‐OECTs) have shown tremendous potential in point‐of‐care testing of biofluids due to low...
Diabetic wound healing remains challenging owing to the risk for bacterial infection, hypoxia, excessive glucose levels, and oxidative stress. Glucose‐activated cascade reactions can consume glucose and eradicate bacteria, avoiding the direct use of hydrogen peroxide (H2O2) and wound pH restriction on peroxidase‐like activity. However, the anoxic microenvironment in diabetic wounds impedes the cascade...
Here, a universal template‐activation strategy is proposed to prepare two different types of porous carbonaceous materials for potassium ion hybrid capacitor (PIHC) anode and cathode, which is realized by only changing the type of cation (Na+ and K+) in the polysilicic acid‐organic mixed hydrogel precursor originating from adding organic acid into Na2SiO3 and K2SiO3 solution, respectively. TG‐IR data...
Developing novel, efficient, and low‐cost 3D FeNi‐based oxygen evolution reaction (OER) catalysts with the special hydrophilic channel is still a challenge for improving hydrogen production efficiency. Herein, a novel 3D ethoxy substituted FeNi oxalate (ENWs‐FeNi‐C2O4) nanowires network catalyst with hydrophilic channels is reported firstly, which shows an outstanding OER activity with a low overpotential...
The oxygen evolution reaction (OER) plays a key role in many electrochemical energy conversion systems, but it is a kinetically sluggish reaction and requires a large overpotential to deliver appreciable current, especially for the non‐noble metal electrocatalysts. In this study, the authors report a surface phase engineering strategy to improve the OER performance of transition metal nitrides (TMNs)...
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