Metal oxides (MOs) have been widely investigated as promising high-capacity anode material for lithium ion batteries, but they usually exhibit poor cycling stability and rate performance due to the huge volume change induced by alloying reaction with lithium. In this article, we present a double protection strategy fabricating two-dimensional (2D) core-shell nanostructure improve electrochemical of metal in storage. The 2D architecture is constructed confining well-defined graphene based...

A lotus-root-like three-dimensional mesoporous silicon is successfully prepared by a magnesiothermic reduction method using SBA-15 silica as both template and precursor. After carbon coating via chemical vapor deposition process, this anode material shows high reversible capacity of ∼1900 mAh g−1 excellent rate performance even up to 15C. Detailed facts importance specialist readers are published ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They...

Hierarchical porous TiO(2)-B with thin nanosheets is successfully synthesized. polymorph ensures fast insertion of Li-ion due to its pseudocapacitive mechanism. The nanosheet walls structure allow exposure electrolytes for facile ionic transport and interfacial reaction. joint advantages endow this material high reversible capacity, excellent cycling performance, superior rate capability.

A microporous carbon coated core/shell Si@C nanocomposite prepared by in situ polymerization exhibits a stable capacity of over 1200 mAh g(-1) with 95.6% retention even after 40 cycles, which makes it promising anode material for lithium ion batteries.

Crumbled graphene sheet-wrapped nano-Fe2O3 (Fe2O3@GS) composites with a three-dimension (3D) hierarchical structure have been made by facile and efficient spray drying route following mild heat reduction in air. In the as-obtained composites, crumpled GS around Fe2O3 particles could not only provide 3D conductive matrix but also buffer volume change of Fe2O3. which evenly distribute act as spacers to avoid close restacking GS. Compared bare Fe2O3, Fe2O3@GS Li ion battery anodes show...

A novel bath lily-like graphene sheet-wrapped nano-Si composite synthesized via a simple spray drying process exhibits high reversible capacity of 1525 mAh g−1 and superior cycling stability, which could be attributed to synergistic effect between highly conductive sheets active nanoparticles in the open nano/micro-structure.

In this work, the preparation of novel macroporous germanium (p-Ge) and its electrochemical characterization as anode material for lithium-ion batteries is presented. Three-dimensional (3D) particles with a hexagonal-like morphology were successfully prepared using magnesiothermic reduction method, in which GeO2 serves not only template, but also source. The obtained demonstrates uniform pores within particles, serve buffer zone to effectively accommodate big volume changes during lithiation...

A graphene-wrapped silver–porous silicon composite has been prepared and used as the anode material in lithium-ion batteries (LIBs). Porous (pSi) through a magnesiothermic reduction of mesoporous silica MCM-41 was surface-modified by Ag nanoparticles formed via thermal decomposition AgNO3 then graphene nanosheets (GNS) generated oxide. The obtained Ag–pSi/GNS exhibits distinctly high reversible specific capacity, long cycling performance super rate capability. An initial capacity 3531 mA h...

Steroid resistant (SR) asthma is characterized by persistent airway inflammation that fails to resolve despite treatment with high doses of corticosteroids. Furthermore, SR patient airways show increased numbers neutrophils, which are less responsive glucocorticoid. The present study seeks determine whether dexamethasone (DEX) has different effect on neutrophils from steroid sensitive (SS) asthmatics compared asthmatics. Adults (n = 38) were classified as or SS based changes in lung FEV1%...

Abstract Subcritical and supercritical water systems, critical in nuclear energy, thermal power, pollutant treatment, operate under extreme conditions that intensify material corrosion. In-situ electrochemical monitoring provides essential real-time data for optimizing operational enhancing corrosion prediction models. This paper evaluates high-temperature techniques, focusing on the performance of reference electrodes research platforms. While hydrogen offer precision, their complexity...

A novel Si-MWNT nanocomposite synthesized via a CVD process shows high reversible capacity of over 1500 mAh g−1 and stable cycling performance, which can be ascribed to the maintenance good conductive network by means direct scattered growth pinning MWNTs on Si particles.

A novel three-dimensional porous Si-MWNT heterostructure was designed to meet the demand of high-capacity and long-life lithium storage. This material presented a stable capacity above 1000 mAh g(-1) for nearly 200 cycles, which benefited from its highly structure combined with robust MWNT connections that accommodated host volume change improved electric conductivity.

Little is yet known whether pathogenesis of COVID-19 different between young and elder patients. Our study aimed to investigate the clinical characteristics provide predictors mortality for adults with severe COVID-19. A total 77 confirmed were recruited retrospectively at Tongji Hospital. Clinical characteristics, laboratory findings, treatment outcomes obtained from electronic medical records. The prognostic effects variables analyzed using logistic regression model. In this retrospective...

A new kind of nanoporous silicon/carbon composite with excellent electrochemical performance was prepared via a mechanochemical reaction between SiCl4 and Li13Si4 under ball milling. The whole process is mild simple, using no corrosive acid. In particular, this method suitable for large-scale synthesis silicon based potential anode material lithium ion batteries. Different structures carbon coating approaches were investigated. Compared nano-Si/SP/C-D np-Si/SP/C-S, the np-Si/SP/C-D exhibited...

A new traffic light detection and recognition algorithm for electronic travel aid was realized. Traffic lights were detected by rectangular circular shapes extraction. Color distributions of the regions in HSI RGB color space, combined with position shape rectangle used to recognize light. Gray level normalization, top hat transformation image interception reduce disturbances environment. The average rate is 97% speed 0.086s per frame. Video analysis improve performance system.

Abstract Background Pentraxin 3 (PTX3) regulates multiple aspects of innate immunity and tissue inflammation. Recently, it has been reported that PTX3 deficiency enhances interleukin (IL)-17A–dominant pulmonary inflammation in an ovalbumin (OVA)-induced mouse asthma model. However, whether treatment would provide protection against allergic airway not clearly elucidated. The goal this study was to further investigate the effect recombinant administration on phenotype asthma. Methods C57BL/6...

The thermal reverse flow reactor is an effective technical equipment for dealing with ventilation air methane, which has been causing a significant greenhouse effect. An experimental study on the oxidation of methane in was conducted. A mixture domestic gas and ambient used to simulate experiments, conversion efficiency analyzed based concentration combustion products determined by chromatography equipment. In addition, effects switching time, inlet concentration, rate, heat extraction were...

The copper-clad magnesium composite wire with a diameter of 3.12 mm and good interface bonding was prepared by cold rotary swaging. effects swaging annealing temperature on microstructure properties the were studied electron backscatter diffraction, transmission microscopy, as well mechanical electrical tests. results show that multi-pass has great effect grain refinement, recovery structural unit reorientation, can also make obtain interfacial quality, improve properties, tensile strength...

Monitoring the surface subsidence in mining areas is conducive to prevention and control of geological disasters, prediction early warning accidents. Hunan Province located South China. The mineral resource reserves are abundant; however, large medium-sized mines account for a low proportion total, concentration distribution low, meaning that traditional monitoring struggles meet needs large-scale province. advantages Interferometric Synthetic Aperture Radar (InSAR) technology deformation...