Rechargeable lithium‐ion batteries (LIBs) are today's best performing and most promising energy storage devices. Silicon‐based anode materials with ultrahigh specific capacity expected to help LIBs play a more significant role in practical applications. However, the irreversible volume expansion of silicon during charge discharge, which makes material devastatingly shattered, unstable solid electrolyte intermediate film have greatly affected LIB cycle stability slowed commercialization...

The desirable sowing period for winter wheat is very short in the rice-wheat rotation areas. There are also lots of straw left harvested land. Deep rotary tillage can cover rice under surface to increase soil organic matter. Clarifying effect blade on and straw, as well analyzing movement patterns forces soil, essential investigate deep process order solve problems energy consumption poor burial machinery. In this study, we built interaction model blade-soil-straw through discrete element...

The ever evolving technology of the Internet Things(IoT) requires ubiquitous connectivity to billions heterogeneous devices such as sensors, cameras, RFID devices, etc. However, due heterogeneity and access protocols, IoT networks are becoming enormous complex, which makes management extremely difficult. Based on Machine-to-Machine(M2M) technics programmability feature network, brought by Software Defined Network(SDN), in a network can be treated objects, thus decoupling control plane from...

It is urgent to develop a rapid, reliable, and in-site determination method detect or monitor trace amounts of toxic substances in the field. Here, we report an alternative surface-enhanced Raman scattering (SERS) coupled with portable device on plasmonic three-dimension (3D) hot spot sensing surface. Plasmonic Ag nanoparticles (AgNPs) were uniformly deposited 3D TiO2 nanopore arrays as sensitive SERS substrate, further coated graphene oxide (GO). We demonstrate plasmon-induced enhancement...

Ni–W/Cr2O3 nanocomposite coatings were synthesized from aqueous sulphate-citrate electrolyte containing Cr2O3 nanoparticles on a steel surface using conventional electrodeposition technique. This study was aimed at investigating the influence of nanoparticle content microstructure, corrosion resistance, and mechanical properties electrodeposited coatings. Ni–W binary alloy deposited optimized before addition to produce high-quality The microstructure chemical composition evaluated scanning...

A facile and mild solution method has been discovered for the synthesis of complex PbTe hopper crystals in large quantities, which are highly similar to cubic halite skeletal formed from extreme supersaturation salt lakes existing nature. This route may provide a new approach growing other semiconductor structures high hierarchy.

Abstract It is highly desirable to readily detect the residues of toxic organics in field with a portable device. Herein, we report photo‐induced enhanced Raman spectroscopy (PIERS) technique combined approach analytes at trace levels. A new type TiO 2 −Ag nanopore array as powerful PIERS substrate was fabricated by depositing Ag nanoparticles on nanopores. This semiconductor‐metal three‐dimensional hybrid nanostructure achieved an 8‐fold enhancement over normal SERS due light‐induced charge...

In order to improve the wear and seawater corrosion resistance of metals, Ni–Co–P alloy coatings were fabricated on 45 steel substrates with jet electrodeposition in different voltages temperatures plating solution. The cross-section morphology, chemical composition, crystalline structure, microhardness, wear, samples analyzed characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), microhardness tester, friction electrochemical...

Type 45 steel substrate surfaces were coated with Ni–Co–P alloy coatings using jet electrodeposition in varying reciprocating sweep speed and gap to improve the wear seawater polarization resistance of surface. The properties deposited analyzed characterized. results showed that morphologies cross-section, thickness, chemical composition affected by variation. At a 175 mm·s−1 coupled 2.0 mm, content Co element deposit attained highest value 47.66 wt.%. Reciprocating variation exhibited no...

Series of anode materials (Ag modified Li4TiO512) were acquired through two types solid state calcination (doping and coating). The samples characterized by XRD their grain sizes examined laser particle-size analyzer the morphology them obtained SEM. At 0.5 C discharging rate, first specific discharge capacities Ag doped Li4Ti5O12 (the amounts dopants 0.1, 0.25, 1 wt% weight Li4Ti5O12) found to be 136.8, 135.5, 140.4 155.6 mAh/g respectively. However, corresponding values coated coating...

High velocity arc spraying was used to prepare FeCrAl/Al composite coating on Q235 steel substrate by simultaneously FeCrAl wire as the anode and Al cathode. The sprayed with varying voltage current obtain optimum characteristics. also prepared for comparison purposes. surface microstructure of coatings characterized scanning electron microscope (SEM) X-ray diffraction (XRD). average microhardness analyzed compared. Corrosion resistance investigated means electrochemical tests. image results...

Lithium‐rich manganese‐based (LRM) cathode materials have recently gained increasing attention for their remarkable reversible capacity of up to 378 mAh g −1 . However, the development these is hindered by several challenges, including oxygen deficiency, migration transition metal ions, and structural changes from lamellar spinel phases. As a result, limitations result in low initial Coulomb efficiency, capacity/voltage decay, inadequate cycle life. To address issues, modification layered...

Abstract A potential anode material for lithium‐ion batteries (LIBs), Co 3 O 4 has been widely considered by many scholars because of its excellent properties in terms electrochemical characteristics and theoretical specific capacity. However, according to the existing research results, we found that improvement performance encountered a bottleneck intrinsic conductivity is not high enough, more importantly, volume expansion too significant during charge discharge process, which leads...

The layered LiNi1/3CO1/3Mn1/3-xMg(x)O2 (x = 0, 0.01, 0.03, 0.05) cathode materials were prepared by solid state reaction, then copper oxide was coated on the product. structures, morphologies and electrochemical properties of LiNi1/3Co1/3Mn1/3-xMg(x)O2 CuO-coated characterized X-ray diffractometry (XRD), scanning electron microscopy (SEM), tests. results showed that electrochemistry cycle performance magnesium doped LiNi1/3Co1/3Mn1/3O2 improved. optimal doping content Mg x 0.03 in samples to...