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Ionic Liquid‐Assisted Fast Synthesis of Carbon Dots with Strong Fluorescence and Their Tunable Multicolor Emission

Fast fabrication of tunable multicolor fluorescent carbon dots (CDs) with ultrahigh photoluminescent quantum yield by using ionic liquid under mild conditions is reported. Density functional theory calculation reveals that the size and graphite nitrogen ratios of CDs have an effect on bandgap reduction, resulting in a redshift of the emission. The synthesized...

A Solid‐Phase Conversion Sulfur Cathode with Full Capacity Utilization and Superior Cycle Stability for Lithium‐Sulfur Batteries

A solid-phase conversion sulfur cathode with full capacity utilization and superior cycling performance in VC-ether cosolvent electrolyte is successfully developed by encapsulating sulfur in the mesoporous channels of CMK-3 carbon to form a coaxially assembled sulfur/carbon (CA-S/C) composite. This composite exhibits an ultrahigh reversible capacity...

A Multifunctional Silicon‐Doped Polyether Network for Double Stable Interfaces in Quasi‐Solid‐State Lithium Metal Batteries

A silicon-doped polyether as a multifunctional unit of quasi-solid-state electrolyte for Li-metal batteries is reported, which can form the stable solidelectrolyte-interface layers with rich LixSiOy on the anode and cathode, as well as improve the battery safety. Abstract Polymer-based quasi-solid-state electrolyte (QSE) is an effective means...

Constructing High Efficiency CoZnxMn2–xO4 Electrocatalyst by Regulating the Electronic Structure and Surface Reconstruction

In this work, several vacancy-dependent CoZnxMn2–xO4 catalysts are prepared by tailoring the concentration of Zn ions. The in situ activation can accelerate the surface reconstruction. The excellent electrocatalytic performance can be attributed to the formations of active species and abundant oxygen vacancies, which are comparable to noble IrO2 and...

A Shape‐Programmable Hierarchical Fibrous Membrane Composite System to Promote Wound Healing in Diabetic Patients

Chronic wound healing is impaired in people suffering from diabetes mellitus. Here, a hierarchically structured, shape-programmable dressing is developed, which elicits accelerated wound healing of chronic diabetic wound tissue. Given the scope for improving the lives of people suffering from diabetes, it is believed that this work could better instruct...

A Robust Approach to In Situ Exsolve Highly Dispersed and Stable Electrocatalysts

A robust and general approach for in situ highly dispersed nanoparticles exsolution from the interstitial space of a NiOOH framework at room temperature with ≈20 min is presented. Cu NPs catalyst prepared by the approach delivers an exceptional CO faradaic efficiency of 95.6% for the electrochemical reduction of CO2 with a notable durability. ...

Ion Migration in Organic–Inorganic Hybrid Perovskite Solar Cells: Current Understanding and Perspectives

The origin of ion migration in organic–inorganic hybrid perovskites (OIHPs) is first reviewed. The ions that may migrate in OHIPs and migrating channels are further discussed in detail. The effects of ion migration on OHIPs are explored and some recently emerged regulation strategies are summarized. A perspective on further inhibition of ion migration...

Heterostructure of RuO2‐RuP2/Ru Derived from HMT‐based Coordination Polymers as Superior pH‐Universal Electrocatalyst for Hydrogen Evolution Reaction

The heterostructure of RuO2-RuP2/Ru nanoparticles embedded on the N, P dualdoped carbon matrix is prepared with a sacrificial precursor. Taking advantage of the combined action between the precursors and phosphate, the RuO2-Ru2P/Ru heterostructure is synchronously generated and served as active sites for HER. The Ru-HMT-MP-7 achieves a superior activity...

Smart Film Actuators for Biomedical Applications

In this review, the authors summarize the latest achievements of smart film actuators applied in biomedical fields. They start by introducing the fabrication techniques of smart film actuators, then shift to their topology design, material selections and distinct actuating mechanisms. After that, they categorize their biomedical applications in practical...

Water‐Processable and Multiscale‐Designed Vanadium Oxide Cathodes with Predominant Zn2+ Intercalation Pseudocapacitance toward High Gravimetric/Areal/Volumetric Capacity

Water-processable and binder-free cathode based on high packing-density sheet-shaped composites of carbon nanotubes network, surface poly(3,4-ethylenedioxythiophene) bridging coating, and ultrasmall PVO nanoflakes is developed. The containing multiscale material/electrode design formula conduces to predominant Zn2+ intercalation pseudocapacitance for...

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