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Persistent and stable nitrogen-centered organic radicals, including non-heterocyclic/heterocyclic nitrogen-centered radicals and nitrogen-centered radical complexes, have attracted much attention due to their special multiple physical properties. Up to now, numerous nitrogen-centered radical materials have been developed and applied as functional materials in magnetic, electronic, optical, and biologic fields. This review aims to discuss their structural features, physical properties, and recent progress in materials applications. Finally, an outlook providing inspiration for the future development is given. [ABSTRACT FROM AUTHOR]

Flexible strain sensors have enormous potential in wearable devices, robots, and health monitoring equipment. However, the poor stretchability of strain sensors based on semiconductors and the low sensitivity of resistance change‐based hydrogel strain sensors hinders the comprehensive application. Herein, a flexible piezoionic SnSe‐hydrogel composite with an optimized structure and improved performance is designed. The piezoionic output rises nonlinearly as the applied force increases, with the piezoionic coefficient up to 1780 nV Pa−1 and −7.21 nA Pa−1. The composite can realize the continuous positioning in 1D space based on the piezoionic effect. It also demonstrates self‐powered characteristics, an ultrafast response speed of 6–8 ms, and a high gauge factor of 95.89. The sensor is exemplified to monitor fist clenching and finger bending, which has the potential to discriminate different joint movements. Meanwhile, the device can light up a light–emitting diode under pressure and bending. The as‐prepared piezoionic SnSe‐hydrogel device, having both high stretchability and sensitivity, may shed light on developing high‐performance flexible strain sensors and generators. [ABSTRACT FROM AUTHOR]

Polymer matrix is felicitously applied into the active layer and transporting layer of perovskite solar cells (PSCs) to enable a stretchable function. However, the chaotic deposition of polymer chains is the main cause for the inferior photoelectric performance. When the stretchable PSCs are in a working state, the stress cannot be removed effectively due to the random polymer chain deposition. The stress accumulation will cause irreversible damage to the stretchable PSCs. Herein, the structural bionics and patterned‐meniscus coating technology are combined to print the polymer chain‐oriented deposition in the stretchable PSCs. Based on this approach, the conducting polymer electrode is printed with both significant mechanical stability and conductivity. More importantly, the oriented polyurethane with self‐healing property can enhance the crystal quality of perovskite films and repair perovskite cracks caused by stress destruction. Thus, the corresponding stretchable PSCs achieve a stabilized power conversion efficiency (PCE) of 20.04% (1.0 cm2) and 16.47% (9 cm2) with minor efficiency discrepancy. Notably, the stretchable PSCs can maintain 86% of the primitive PCE after 1000 cycles of bending with a stretch ratio of 30%. This directional growth of polymer chain strategy provides guidance for printing prominent‐performance stretchable PSCs. [ABSTRACT FROM AUTHOR]

Meniscus‐coating as a high‐throughput preparation process has significant advantages in the manufacture of large‐area perovskite solar cells (PSCs). However, the gradient crystallization during printing significantly affects the vertical uniformity of perovskite films, which greatly affects the carrier transport of perovskite films and the stability of PSCs. Here, a perovskite ink compatible with printing technology is reported to realize uniform printing of perovskite film on a 3D scale. The siloxane 3D network hinders the solute migration caused by capillary force and acts as a skeleton to promote the uniform crystallization of perovskite films. Consequently, the corresponding fully printed PSCs have reduced efficiency loss (from 37.4% to 17.0%). In addition, based on the improvement of crystal quality and reduction of defects in perovskite films, the siloxane‐optimized PSCs achieved a championship efficiency of 22.0%, which is one of the highest performance for fully printed devices. The optimized device retains 80% of the initial PCE after 800 h AM 1.5G one‐sun illumination, and only decreases 20% after 160 h of ultraviolet light (365 nm, 20 mW cm−2) irradiation. [ABSTRACT FROM AUTHOR]

Layered SnSe is an emerging class of black phosphorus, which is non‐toxic, eco‐friendly, and chemically stable. Recently, SnSe nanostructures have triggered more research interest and enabled broad applications beyond demonstrating their great performances on thermoelectricity. However, there are also a great many significant studies of SnSe nanostructures beyond thermoelectricity. SnSe quantum dots, nanosheets, nanowires, and thin films with diverse morphologies have been synthesized using various chemical and physical preparation approaches. SnSe is a multi‐phase semiconductor, and its nanostructures endow unique properties, including small electron effective mass, ultralow thermal conductivity, huge anisotropy, and the largest 2D piezoelectric coefficient ever predicted. The versatility of SnSe nanostructures can enable potential applications ranging from ultrafast photonics, logic devices, photodetectors, solar cells, photocatalysis, energy storage, and biology to more cutting‐edge interdisciplinary subjects. In this review, the recent advances made in SnSe nanostructures are summarized, covering basics, synthesis, properties, and applications, just giving a passing comment on thermoelectricity. An in‐depth perspective on the challenges and prospects of SnSe nanostructures toward broad and practical applications is also given. [ABSTRACT FROM AUTHOR]

There are several attractive opportunities for using magnetic nanomaterials for anticancer applications. Herein, a magnetic nanomaterial platform is successfully developed based on natural Fe3O4 magnetosomes extracted from the bacterium Magnetospirillum magneticum AMB‐1 for anticancer therapy. The authors initially functionalize the magnetosome membranes in situ with gold nanoparticles to construct an attractive core‐satellite structure. Subsequently, the physical properties and application potentials of these structures are characterized as contrast agents for photoacoustic imaging and magnetic resonance imaging and as therapeutic agents with selective magnetic field guidance for diverse antitumor modalities, including starving, chemodynamic, and photothermal therapies. Owing to the high‐performance imaging‐guided synergistic effect, only a single injection and single laser irradiation result in excellent therapeutic efficacy against tumor growth in multiple cell‐derived xenograft tumor models and, most notably, patient‐derived organoid and patient‐derived xenograft tumor models. The demonstrations of the use of natural magnetic nanomaterials to achieve strong and synergistic antitumor performances highlight the promising application potential of this flexible and easy‐to‐prepare platform for developing innovative treatments for diseases in humans. [ABSTRACT FROM AUTHOR]

The efficiency of hydrogen evolution reaction (HER) electrocatalysts under acidic conditions is largely determined by the equilibrium of hydrogen adsorption/desorption on the catalyst surface. A promising strategy for enhancing the performance of multimetal‐supported HER electrocatalysts is the utilization of hydrogen spillover. However, current heterostructured catalysts often present challenges such as high interfacial transport barriers, extended reaction paths, and intricate synthesis processes. Addressing these limitations, a novel orthorhombic SrHf1−xRuxO3−δ perovskite oxide is proposed as an exemplary model for an atomic‐level configuration design strategy. This material exhibits a unique synergistic effect of multiple atomic‐level catalytic sites between Hf/Ru pairs, overcoming the aforementioned challenges. This study presents a new cooperative mechanism for HER, consisting of three steps: proton adsorption on the Hf site, hydrogen migration via a strong O‐bridge site, and H2 detachment from the Ru active site. The high conductivity and unusual charge redistribution within the Hf‐O‐Ru structure further enhance the specific acidic HER activity of SrHf1−xRuxO3−δ. This research paves the way for designing high‐performance HER catalysts for acidic media, leveraging hydrogen spillover and atomic‐scale configurations. The findings have significant implications for the development of efficient, cost‐effective, and environmentally friendly hydrogen production technologies. [ABSTRACT FROM AUTHOR]

Biogenic amines (BAs) are important indicators for the evaluation of food spoilage and disease diagnosis. Thus, the detection of BAs with high practical potential is of great importance. In this work, a new BAs fluorescent probe design strategy is proposed by the intramolecular charge transfer (ICT) enhancement of the fluorescent probes, which is induced by the hydrogen bond interaction between probes and analyte. The probes T1 and T2 with donor–acceptor structure not only present a 140 nm bathochromic‐shifted emission, ultrafast responses (15 s for T1 and 25 s for T2), and high sensitivity (detection limit of 1.3 ppm for T1 and 2.6 ppm for T2) to cadaverine (the typical representative of BAs) but also discriminate a series of BAs and simply reused at least 30 times after air blowing. Further, a quantitative evaluation system is obtained based on T1 and T2 films. Through the Red/Green/Blue analysis with a smartphone, the total volatile basic nitrogen (an international standard to assess food spoilage) value can be output to quantitatively evaluate the freshness of food. The system is fast, visual, accurate, and non‐destructive, enabling consumers and all stakeholders in the food supply chain to monitor food freshness. [ABSTRACT FROM AUTHOR]

Layered transition metal oxide (NaxTMO2), being one of the most promising cathode candidates for sodium‐ion batteries (SIBs), have attracted intensive interest because of their nontoxicity, high theoretical capacities, and easy manufacturability. However, their physical and electrochemical properties of water sensitivity, sluggish Na+ transport kinetics, and irreversible multiple‐phase translations hinder the practical application. Here, a concept of surface lattice‐matched engineering is proposed based on in situ spinel interfacial reconstruction to design a spinel coating P2/P3 heterostructure cathode material with enhanced air stability, rate, and cycle performance. The novel structure and its formation process are verified by transmission electron microscopy and in situ high‐temperature X‐ray diffraction. The electrode exhibits an excellent rate performance with the highly reversible phase transformation demonstrated by in situ charging/discharging X‐ray diffraction. Additionally, even after a rigorous water sensitivity test, the electrode materials still retain almost the same superior electrochemical performance as the fresh sample. The results show that the surface spinel phase can play a vital role in preventing the ingress of water molecules, improving transport kinetics, and enhancing structural integrity for NaxTMO2 cathodes. The concept of surface lattice‐matched engineering based on in situ spinel interfacial reconstruction will be helpful for designing new ultra‐stable cathode materials for high‐performance SIBs. [ABSTRACT FROM AUTHOR]

Donor‐acceptor (D–A•) type luminescent organic radicals have received widespread attention as efficient doublet emitters. However, their generally low photoluminescence quantum efficiency (PLQE) and limited photostability restrict their various applications. Since unraveling the relationship between structure and properties of D–A• type luminescent radicals remains a challenge, here, a series of tri(2,4,6‐trichlorophenyl)methyl (TTM) radical derivatives, which differ by the location of their ring fusion sites and nature of their heteroatoms, is synthesized. The PLQE of isomers varies by ten times as a function of ring fusion sites. In particular, the PLQE of a radical undergoing ring fusion at the carbazole 3,4‐position is as high as 98.0%. Quantum‐chemical calculations show that in the case of overlapping holes and electrons, by increasing the effective distance between the D and A moieties, the radiative transition rates of the radicals increase. Also, decreasing the electronic coupling between the charge‐transfer and local‐excited states and avoiding large geometrical distortions between the ground state (D0)_and the first excited state (D1) can significantly reduce the nonradiative transition rates. This work offers a design strategy to obtain efficient and stable luminescent radicals by modifying the sites of ring fusion, which allows control of the radiative and nonradiative transition rates. [ABSTRACT FROM AUTHOR]

High‐specific energy sulfur‐based cathodes have attracted considerable interest in lithium batteries. Organosulfur cathodes offer inherent advantages of high element abundance and an extended cycling life, aligning with the evolving requirements of future energy storage devices. Over the past decade, research efforts have been devoted to optimizing electrochemical performance through the rich and tunable molecular structures of organosulfur compounds. To further advance the fundamental research and practical application of lithium‐organosulfur batteries, a systematical analysis of the correlation between the molecular structures and electrochemical mechanisms of organosulfur cathodes is imperative. This involves deriving the key parameters at the cell level and investigating the feasibility. In this review, the thermodynamics, reaction processes, and electrochemical kinetics of organosulfur cathodes, grounded in fundamental theories of electrochemistry and materials science are discussed. Expanding the insights, comparisons among elemental sulfur, organosulfur, and n‐type organic cathodes (e.g., carbonyl cathodes) are drawn. The gap between fundamentals and practical applications targeting 500 Wh kg−1 lithium organosulfur batteries is highlighted through energy density calculations and identification of key factors affecting pouch cells. Finally, potential strategies and prospects for the overall design of advanced lithium‐organosulfur batteries are proposed, considering both theoretical foundations and practical implementations. [ABSTRACT FROM AUTHOR]

Polarization‐sensitive infrared (IR) photodetection plays an important role in fiber optic communication, environmental monitoring, and remote sensing imaging. Semiconductors with quasi‐1D crystal structures exhibit unique optical and electrical properties due to their 1D carrier transport channels and large surface area‐to‐volume ratio, offering the possibility of high‐performance photodetectors with high photogain (G), polarization sensitivity photodetection. Herein, an ultra‐broadband photodetection (405 nm–10.6 µm) based on a quasi‐1D (TaSe4)2I single‐crystal nanowire is reported. The (TaSe4)2I photodetector exhibits excellent polarization‐sensitive photodetection, with a high dichroic ratio of Imax/Imin = 2.32 under 637 nm illumination. Notably, the (TaSe4)2I nanowire photodetector exhibits a competitive performance in uncooled mid‐wave infrared (MWIR) detection with a high photoresponsivity (R) of 110.5 AW−1 and specific detectivity (D*) of 4.8 × 1010 cmHz1/2W−1. Moreover, in the long‐wave infrared (LWIR) spectral range, an R of 67.6 mAW−1 is demonstrated at room temperature (RT). The (TaSe4)2I nanowire photodetector enables significant advancements for polarization‐sensitive and uncooled MWIR and LWIR photodetection. [ABSTRACT FROM AUTHOR]

Microporous polyethylene (PE) membrane is a representative lithium‐ion battery (LIB) separators but regularly shrinks especially in high‐temperature conditions, and is facilely pierced while growing Li dendrites, leading to severe consequences such as short circuits, thermal runaway, and even explosion. Herein, this article reports a quasi‐continuous strategy that utilizes in situ enamel mineralization engineering followed by thermal treatment to easily develop a large‐area, 3D interlaced hydroxyapatite nanosheets array‐reinforced PE nanocomposite separator with robust mechanical properties and excellent resistance to thermal shrinkage. Specifically, the 120 °C‐heated nanocomposite possesses excellent breaking stress, an ultrahigh toughness of ≈434.4 MJ m−3, and an enhanced friction coefficient of ≈0.69, which are distinctly higher than those of commercial PE separators, respectively, and far exceeding those of reported ceramic modified‐PE separators. The elongation of the resultant nanocomposite can achieve an extraordinary ≈2456.4% without any fracture under a 180 °C‐heating temperature. In situ observation and finite element simulation indicate that the impressive mechanical and thermostable integration profits from the co‐effect of efficient energy dissipation at organic–inorganic interfaces and mechanically interlocked, mutually‐supported hybrid microstructure. The enamel‐inspired separator can be potentially applied in safer high‐temperature LIBs and this strategy provides a valuable guide to develop other high‐performance polymer‐based nanocomposites. [ABSTRACT FROM AUTHOR]

Magnetic field‐enhanced electrocatalytic activity has recently emerged as an effective strategy for electrocatalytic reactions. However, modulating the electrical behavior and spin ordering in real‐time using magnetic field during the electrocatalytic process remains challenging. Herein, based on the coexistence of room‐temperature ferromagnetic and magnetoresistance (MR) properties in La1−xSrxMnO3, it demonstrates that in addition to spin polarization, the negative MR effect contributes significantly to the enhancement of the oxygen evolution reaction (OER) owing to the considerable MR value (−7.32% for La0.8Sr0.2MnO3 at 1.0 T). Accordingly, a lessened OER overpotential of ≈120 mV (at 10 mA cm−2) and a reduced charge‐transfer resistance are observed in La0.8Sr0.2MnO3 under a magnetic field of 1.0 T. Additionally, the power density of self‐assembled Zn–air battery (ZnAB) based on La0.8Sr0.2MnO3 improves by 5.9 times under 1.0 T. Calculation results reveal that spin alignment can induce more unoccupied electronic states near the Fermi level, decrease the energy level of the Mn d‐band center, and significantly reduce the O* formation barrier to enhance the OER activity of Sr‐doped LaMnO3. Thus, the in situ regulation of charge and spin ordering by magnetic field offers a deeper understanding for designing high‐performance ZnABs. [ABSTRACT FROM AUTHOR]

The commonly used "catalyst on carbon" architecture as a sulfur host is difficult to jointly achieve high gravimetric and volumetric energy densities for lithium–sulfur (Li–S) batteries due to the contradiction between low tap density/poor catalytic activity of carbon and the easy agglomeration of metal‐based compounds without carbon. Here, a non‐carbon‐dominated catalytic architecture using macroporous nickel/cobalt phosphide (NiCoP) is reported as the sulfur host for Li–S batteries. The macroporous framework, which accommodates a large amount of sulfur, can accelerate the electrochemical reaction kinetics by accelerated e− transport, Li+ diffusion, and superior adsorption and catalytic activity of inherent Ni2P/CoP heterostructures. The high tap density (0.45 g cm−3) and mechanically hard features contribute to the excellent structural and physicochemical stability of the NiCoP@S electrode after the pressing and rolling process. These features enable the Li–S coin cell to exhibit excellent electrochemical performance under conditions of high sulfur loading (10.2 mg cm−2) and lean electrolyte (electrolyte/sulfur of 2 µL mg−1). Inspiringly, the assembled pouch cell can simultaneously deliver a gravimetric energy density of 345.2 Wh kg−1 and an impressive volumetric energy density of 952.7 Wh L−1 based on the entire device configuration. [ABSTRACT FROM AUTHOR]

Vanadium‐based intercalation materials have attracted considerable attention for aqueous zinc‐ion batteries (ZIBs). However, the sluggish interlaminar diffusion of zinc ions due to the strong electrostatic interaction, severely restricts their practical application. Herein, oxygen vacancy‐enriched V2O5 structures (Zn0.125V2O5·0.95H2O nanoflowers, Ov‐ZVO) with expanded interlamellar space and excellent structural stability are prepared for superior ZIBs. In situ electron paramagnetic resonance (EPR) and X‐ray diffraction (XRD) characterization revealed that numerous oxygen vacancies are generated at a relatively low reaction temperature because of partially escaped lattice water. In situ spectroscopy and density functional theory (DFT) calculations unraveled that the existence of oxygen vacancies lowered Zn2+ diffusion barriers in Ov‐ZVO and weakened the interaction between Zn and O atoms, thus contributing to excellent electrochemical performance. The Zn||Ov‐ZVO battery displayed a remarkable capacity of 402 mAh g−1 at 0.1 A g−1 and impressive energy output of 193 Wh kg−1 at 2673 W kg−1. As a proof of concept, the Zn||Ov‐ZVO pouch cell can reach a high capacity of 350 mAh g−1 at 0.5 A g−1, demonstrating its enormous potential for practical application. This study provides fundamental insights into formation of oxygen‐vacant nanostructures and generated oxygen vacancies improving electrochemical performance, directing new pathways toward defect‐functionalized advanced materials. [ABSTRACT FROM AUTHOR]

K‐metal batteries have become one of the promising candidates for the large‐scale energy storage owing to the virtually inexhaustible and widely potassium resources. The uneven K+ deposition and dendrite growth on the anode causes the batteries prematurely failure to limit the further application. An integrated K‐metal anode is constructed by cold‐rolling K metal with a potassiphilic porous interconnected mediator. Based on the experimental results and theoretical calculations, it demonstrates that the potassiphilic porous interconnected mediator boosts the mass transportation of K‐metal anode by the K affinity enhancement, which decreases the concentration polarization and makes a dendrite‐free K‐metal anode interface. The interconnected porous structure mitigates the internal stress generated during repetitive deposition/stripping, enabling minimized the generation of electrode collapse. As a result, a durable K‐metal anode with excellent cycling ability of exceed 1, 000 h at 1 mA cm−2/1 mAh cm−2 and lower polarization voltage in carbonate electrolyte is obtained. This proposed integrated anode with fast K+ kinetics fabricated by a repeated cold rolling and folding process provides a new avenue for constructing a high‐performance dendrites‐free anode for K‐metal batteries. [ABSTRACT FROM AUTHOR]

Although there is extensive attention to the eminent perovskite solar cells, the deep‐level defects such as Pb‐Pb dimers in the solution‐processed polycrystalline perovskites inevitably result in photovoltaic output losses and subsequent degradation. Recently, it is reported that an electron‐donating group can passivate Pb dimer defects efficiently. However, the mechanism for the causation of metallic lead (Pb0) from the iodide vacancy (VI) is unclear. Herein, a chain reaction mechanism is proposed for the possible transformation process from VI to Pb0 with the Pb dimer intermediates. In this regard, a host‐guest strategy is adopted by using 4‐tert‐Butyl‐1‐(ethoxycarbonyl‐ methoxy) thiacalix[4]arene (tBuTCA) to complex with the cations and out‐of‐cage (Lead(II) iodide) PbI2. Moreover, a host‐guest complexation can be formed due to the Pb2+‐π interactions. Continuously, the negative charge compensation for iodine vacancy can hinder the formation of Pb‐Pb dimer, thus significantly suppressing non‐radiative recombination. Consequently, the resulting solar cells show more than 24% power conversion efficiencies and maintain over 96% of their initial performance without encapsulation for 486 h under an ambient environment. This work highlights the significance of supramolecular engineering in constructing a high‐quality perovskite for efficient and stable perovskite solar cells. [ABSTRACT FROM AUTHOR]

Dielectric capacitors with high power densities are crucial for pulsed electronic devices and clean energy technologies. However, their breakdown strengths (Eb) strongly limit their power densities. Herein, by modifying the interfacial polarization by adjusting the difference in activation energies (Δϕ) between the grain and grain boundary phases, the significant enhancement of Eb in the (1‐x)(0.94Na0.5Bi0.5TiO3‐0.06BaTiO3)‐xCa0.7La0.2TiO3 (NBT‐BT‐xCLT, x = 0, 0.18, 0.23, 0.28, 0.33, 0.38, and 0.43) ceramics is achieved. The results indicate that adding CLT introduces a super‐paraelectric state, refines grain size, and, most importantly, decreases the Δϕ value. When Δϕ is tuned close to zero in the specific NBT‐BT‐0.38CLT sample, a significant boost in Eb value of 64 kV mm−1 is obtained. As a result, the recoverable energy storage density of the ceramics reaches an unprecedented giant value of 15.1 J cm−3 together with a high efficiency of 82.4%, as well as ultrafast discharge rate of 32 ns, and high thermal and frequency stability. The results demonstrate that interfacial polarization engineering holds huge promise for the development of dielectrics with high‐energy‐storage performance. [ABSTRACT FROM AUTHOR]

High‐performance n‐type solid‐state ionic thermoelectrics (SS i‐TEs) for low‐grade heat harvesting are highly desired and challenging. Here, the design and synthesis of an efficient n‐type mixed conductor via ion pair modulation is demonstrated, which consists of biguanide hydrochloride (MfmCl) and a poly(3,4‐ethylenedioxythiophene) (PEDOT): poly(styrenesulfonate) (PSS) polymeric complex in a solid film. Theoretical calculations and nano/microstructure characterization reveal that the binding preference of ion pairs offers energetically favorable ion exchange in the matrix, which induces not only tightly bound Mfm PSS species but also favorable anion diffusion channels. Consequently, an enhanced ionic conductivity of 1.40 S m−1 with a record highest negative thermopower of −46.97 mV K−1 is achieved for the n‐type mixed conductor thus far. [ABSTRACT FROM AUTHOR]

Surface Lattice-Matched Engineering Based on In Situ Spinel Interfacial Reconstruction for Stable Heterostructured Sodium Layered Oxide Cathodes (Adv. Funct. Keywords: air stability; heterostructures; layered oxide cathodes; sodium-ion batteries; spinel engineering EN air stability heterostructures layered oxide cathodes sodium-ion batteries spinel engineering 1 1 1 04/06/23 20230404 NES 230404 B Layered Oxide Cathodes b In article number 2213215, Yao Xiao, Shu-Lei Chou, Jia-Zhao Wang, Yan-Fang Zhu, and co-workers propose a concept of surface lattice-matched engineering based on in-situ spinel interfacial reconstruction to design a spinel coating P2/P3 heterostructure cathode material with enhanced air stability, rate, and cycle performance. Air stability, heterostructures, layered oxide cathodes, sodium-ion batteries, spinel engineering. [Extracted from the article]

Developing a high‐rate and stable battery‐type anode to match the capacitor‐type cathode is a critical issue for potassium ion capacitors (PICs). Surface‐redox pseudocapacitive materials can meet this demand due to their fast surface Faradaic reaction kinetics and superior structure stability during charging–discharging. Herein, a free‐standing anode by growing VN particle‐composed nanosheets on carbon fibers (VN@CFs) is developed. The VN@CFs is endowed with high reversible capacity of 245.8 mA h g–1 at 0.05 A g–1, high rate performance of 102.7 mA h g–1 at 6.0 A g–1, and long‐term stability. Based on the in situ XRD, ex situ XPS and TEM characterizations, and density functional theory calculations, it is proved that the potassium storage of VN derives from a surface‐redox pseudocapacitive mechanism between VN and K+, rather than an intercalation or conversion reaction. As expected, the as‐assembled PICs based on the VN@CFs anode show an ultrahigh power output of 10.9 kW kg–1 when keeping an energy density of 49.2 Wh kg–1 and excellent capacity retention of 86.8% after 15000 cycles. [ABSTRACT FROM AUTHOR]

Metal phosphorous tri‐chalcogenides are a category of new ternary 2D layered materials with a wide range of tuneable bandgaps (1.2–3.5 eV). These wide‐bandgap semiconductors exhibit great potential applications in solar‐blind ultraviolet (SBUV) photodetection. However, these 2D solar‐blind photodetectors suffer from low photoresponsivity, slow photoresponse speed, and narrow operation spectral region, thereby limiting their practical applications. Here, an ultra‐broadband photodetection based on a FePSe3/MoS2 heterostructure with coverage ranging from solar‐blind ultraviolet 265 nm to longwave infrared (LWIR) 10.6 µm is reported. Notably, the device exhibits excellent weak light detection capability. A high photoresponsivity of 33 600 A W−1 and an external quantum efficiency of 1.57 × 107% are demonstrated. A noise‐equivalent power as low as 5.7 × 10–16 W Hz−1/2 and a specific detectivity up to 1.51 × 1013 cm Hz1/2 W−1 are realized in the SBUV region. The room temperature LWIR photoresponsivity of 0.12 A W−1 is realized. This work opens a route to design high‐performance SBUV photodetectors and wide spectral photoresponse applications. [ABSTRACT FROM AUTHOR]

Lithium dendrites caused by nonuniform Li+ flux leads to the capacity fade and short‐circuit hazard of lithium metal batteries. The solid electrolyte interface (SEI) is critical to the uniformity of Li+ flux. Here, an ultrafast preparation of uniform and vertical Cu7S4 nano‐flake arrays (Cu7S4 NFAs) on the Cu substrate is reported. These arrays can largely improve the lithiophilicity of the anode and form Li2S‐enriched SEI due to the electrochemical reduction of Cu7S4 NFAs with lithium. A further statistical analysis suggests that the SEI, with a higher content of Li2S, is more effective to inhibit the formation of lithium dendrites and yields less dead lithium. A quite stable coulombic efficiency of 98.6% can be maintained for 400 cycles at 1 mA cm–2. Furthermore, at negative to positive electrode capacity ratio of 1.5 (N/P = 1.5), the full battery of Li@Cu7S4 NFAs||S shows 83% capacity retention after 100 cycles at 1 C, much higher than that of Li@Cu||S (33%). The findings demonstrate that high Li2S content in the SEI is crucial for the dendrite inhibition to achieve better electrochemical performance. [ABSTRACT FROM AUTHOR]