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Silicon (Si) is considered to be one of the alternative anode candidates for lithium-ion batteries due to the high theoretical capacity. Enhancing the columbic efficiency, cycle stability, alleviating the pulverization and decreasing the manufacturing cost are the major challenges that procrastinate the commercialization of Si anode. Inspirited by spiderweb structure, the Si nanoparticles (SiNPs)...
A composite coating of N-doped graphene quantum dots (N-GQDs)/polymethyltrimethoxysilane (PMTMS) is prepared on the surface of AZ91D magnesium alloy via electrodeposition and subsequent silane treatment. The microstructure of the N-GQDs/PMTMS composite coating is characterized by field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron...
Pressure sensor has attracted great attention due to its wide applications in electronic skin, health monitor, and wearable devices. However, there is still an urgent challenge in sensing the weak force, especially in the micro-contact cases. Herein, a novel cold direct pen writing method has been developed for fabricating reduced graphene oxide microfoam (rGOMF) as a pressure sensing element. The...
The inclusion of conducting nanomaterials in superhydrophobic surfaces can widen their potential applications in terms of Joule heating, electromagnetic interference shielding, oil/water separation, and self-cleaning. Here, we demonstrate the fabrication of multifunctional superhydrophobic surfaces using dispersant-free conducting inks containing highly oxidized long multiwalled carbon nanotubes (Ox-LMWCNTs)...
Lithium metal has long been seen as a promising battery anode due to its high specific capacity and low anode potential. However, serious safety hazards and poor electrochemical performance caused by uncontrollable dendritic growth hinder its practical application. Here, a stable lithium@nanofiber roll composite electrode is developed by utilizing the carbon diffusion effect. By combining carbon with...
Modulus distribution in carbon fiber (CF) monofilament plays a key role in bridging the microscopic heterogeneous structures to the macroscopic mechanical properties, and is critical to understand its performance. Here, we present a quantitative measurement of the modulus distributions for a series of commercially available polyacrylonitrile (PAN)-based CFs (T300, T700S, T800H, T1000G and M40J from...
Despite the significant progress in thermoelectric composites in the last five years, examining the existing main body of publications shows the scarcity of composite systems and limited preparation strategies. Metal-organic frameworks (MOFs) have been extensively studied and have wide applications, however, MOF-related thermoelectric composites have been seldom reported mainly due to their poor electrical...
This article interrogates the mechanism for the incorporation of single-wall carbon nanotubes in the photo-initiated thiol-ene polymerization process and its application in holographic patterning. We find that single-wall carbon nanotube is able to turn on the allylic homopolymerization, which is not involved in the conventional thiol-ene photopolymerization process because of the autoinhibition of...
Three-dimensional (3D) porous materials gain considerable attention in electronics and biomedical/environmental engineering owing to their high porosity, large surface area, and controllable morphological and mechanical properties. In this work, reversibly compressible feather-like lightweight 3D chitosan/graphene oxide (CS/GO) composite foams were prepared with varying the composition ratios of CS...
Intercalated γ-Bi 2 MoO 6 /graphene nanosheet composites (BMO/GNCs) were prepared by vacuum-assistant and solvothermal technique. In BMO/GNCs, BMO nanoparticles (NPs) were uniformly distributed on the surface and interlayer of graphene nanosheets (GNs), simultaneously along with a large number of defects and interface on GNs and BMO NPs. As synthesized with solvothermal temperature at 160 °C and graphite...
Despite the exceptional thermal and mechanical functionalities of diamond, its superlative properties are highly subject to the presence of point defects, dislocations, and interfaces. In this study, polycrystalline diamond is ion implanted with C 3+ , N 3+ , and O 3+ ions at an energy of 16.5 MeV, producing an amorphous layer at the projected range and a damaged crystalline region between the surface...
Fabricating microwave absorbers (MA) with strong attenuation capability and lightweight is still a challenge problem, which limit their further applications in our daily life. Herein, magnetic vortex core-shell Fe 3 O 4 @C nanorings (FNR-C) with excellent microwave absorption property have been successfully prepared by a facile strategy. Electron holography analysis is carried out to detect the magnetic...
Microwave absorbing materials with lightweight, strong absorption, broad bandwidth and thin matching thickness have gained considerable attentions in recent years. Herein, C-doped SiC ceramic nanocomposites with heterostructure were successfully fabricated via solvothermal method using renewable glucose as the carbon source. Such nanocomposites show different permittivity dependent on glucose contents...
It is highly desirable to develop low-cost and high-efficient non-precious electrocatalysts for oxygen reduction reaction (ORR) in attempt to replace the expensive Pt based catalysts for fuel cells and metal-air batteries. Herein, a novel, facile and cost-effective strategy is reported to in situ synthesize isolated single iron (Fe) atoms anchored on nitrogen doped carbon (Fe-ISA/NC) with renewable...
Microstructure is playing a more and more important role in upgrading the performance of microwave absorption materials (MAMs) nowadays. Herein, we demonstrate the successful synthesis of multi-chamber carbon microspheres (MCCMs) with abundant interior cavities. The reflection loss (RL) characteristics of MCCMs and the effect of microstructure on electromagnetic properties have been discussed thoroughly...
Polydiacetylene (PDA) films are shown enabling the combination of graphene transfer and photodetector fabrication into one step. Under the assistance of PDA, centimeter pieces of graphene can be acquired with free of broken or fractures. The constructed PDA/graphene hybrid films demonstrate ultrahigh, gate-tunable responsivity (R) and detectivity (D*) from UV to visible wavelengths, for instance,...
The enhancement of oxygen reduction reaction (ORR) catalytic activity of non-precious metal catalysts is extremely desirable but still full of challenges. Here, a novel hybrid, core-shell Co/CoNx@C nanoparticles enfolded by Co-N doped carbon nanosheets was successfully prepared by a facile two-step method, including the formation of well-curved porous carbon nanosheets by a facile sintering of trisodium...
Exploring highly efficient non-Pt oxygen reduction reaction (ORR) electrocatalysts is an inevitable trend in the progress of various sustainable energy storage and conversion technologies. Herein, we prepare three kinds of hierarchical porous carbons, derived from hypercrosslinked polyaniline (HCP-An), polypyrrole (HCP-Py) and polymethylbenzene (HCP-MB) through a facile Friedel-Crafts reaction, among...
In the past decades, nanotechnology has stimulated a huge amount of interest and is now used in numerous fields. Carbon nanomaterials, like graphene, carbon nanotubes, and fullerenes, have attracted great attention for their widespread applications in diverse fields because of their excellent mechanical, optical, and thermal properties. With substantial production and use, potential human exposure...
The efficiency of many cerium-based redox flow batteries is limited by the sluggish kinetics of the cerium redox reactions and it is thus of great importance to develop electrode materials with high catalytic activity. Herein, an available activation approach for markedly boosting the electrochemical performance of commercially available graphite felts by employing surface-functionalization is developed...
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