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Iron trifluoride (FeF3) is attracting tremendous interest due to its lower cost and the possibility to enable higher energy density in lithium‐ion batteries. However, its cycle performance deteriorates rapidly in less than 50 cycles at elevated temperatures due to cracking of the unstable cathode solid electrolyte interface (CEI) followed by active materials dissolution in liquid electrolyte. Herein,...
Organic frameworks‐based batteries with excellent physicochemical stability and long‐term high capacity will definitely reduce the cost, carbon emissions, and metal consumption and contamination. Here, an ultra‐stable and ultra‐thin perylene‐dicyandiamide‐based hydrogen organic framework (HOF) nanosheet (P‐DCD) of ≈3.5 nm in thickness is developed. When applied in the cathode, the P‐DCD exhibits exceptional...
Short‐wavelength infrared photodetectors play a significant role in various fields such as autonomous driving, military security, and biological medicine. However, state‐of‐the‐art short‐wavelength infrared photodetectors, such as InGaAs, require high‐temperature fabrication and heterogenous integration with complementary metal‐oxide‐semiconductor (CMOS) readout circuits (ROIC), resulting in a high...
The rise of flexible electronics calls for efficient microbatteries (MBs) with requirements in energy/power density, stability, and flexibility simultaneously. However, the ever‐reported flexible MBs only display progress around certain aspects of energy loading, reaction rate, and electrochemical stability, and it remains challenging to develop a micro‐power source with excellent comprehensive performance...
Passivation of the sulfur electrode by insulating lithium sulfide (Li2S) restricts the reversibility and sulfur utilization of lithium–sulfur (Li–S) batteries. Although electrolytes with high donor number (DN) solvents induce tri‐sulfur radical intermediate thus 3D nucleation of Li2S with fast kinetics can be achieved, their catastrophic reactivities with Li metal hinder practical applications. Here,...
Carbonized Polymer Dots
In article number 2106863, Yeqing Chen, Ping Liang, Jun Lin, and co‐workers synthesize transition metal Mn ions doped in the form of covalent Mn–O bonds. The Mn–O bridge accelerates the electron flow between adjacent sp2 domains and enhances the electron transport in the Mn–carbonized polymer dots, thus improving the photoluminescence quantum yield and catalytic performance...
Carbonized polymer dots (CPDs) have received tremendous attention during the last decade due to their excellent fluorescent properties and catalytic performance. Doping CPDs with transition metal atoms accelerates the local electron flow in CPDs and improves the fluorescent properties and catalytic performance of the CPDs. However, the binding sites and the formation mechanisms of the transition‐metal‐atom‐doped...
The formation of solid‐electrolyte interphase (SEI) in “water‐in‐salt” electrolyte (WiSE) expands the electrochemical stability window of aqueous electrolytes beyond 3.0 V. However, the parasitic hydrogen evolution reaction that drives anode corrosion, cracking, and the subsequent reformation of SEI still occurs, compromising long‐term cycling performance of the batteries. To improve cycling stability,...
Interfacial engineering and heterostructures designing are two efficient routes to improve photoelectric characteristics of a photodetector. Herein, a Ti3C2 MXene/Si heterojunction photodetector with ultrahigh specific detectivity (2.03 × 1013 Jones) and remarkable responsivity (402 mA W−1) at zero external bias without decline as with increasing the light power is reported. This is achieved by chemically...
Molecular tunnel junctions are organic devices miniaturized to the molecular scale. They serve as a versatile toolbox that can systematically examine charge transport behaviors at the atomic level. The electrical conductance of the molecular wire that bridges the two electrodes in a junction is significantly influenced by its chemical structure, and an intrinsically poor conductance is a major barrier...
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