Ultrasmall SnS Quantum Dots Anchored onto Nitrogen-Enriched Carbon Nanospheres as an Advanced Anode Material for Sodium-Ion Batteries.

Structural pulverization of metal chalcogenides such as Sn-based compounds is a serious issue for development of high-performance anode materials and results in serious capacity fading during continuous charge and discharge cycles. In this work, we synthesize ultrasmall SnS quantum dots (QDs) anchored onto nitrogen-enriched carbon (NC) nanospheres through facile hydrothermal and carbonization processes to prepare a progressive anode material for sodium-ion batteries. The optimized SnS QDs@NC electrode delivered an initial discharge capacity of 281 mAh g at 100 mA g and exhibited excellent cycling stability with a capacity retention of 75% after 500 cycles at a high current density of 1000 mA g.

Predictors of Sleep Quality Among Young Adults in Korea: Gender Differences.

This study was performed to identify the factors influencing gender differences in sleep quality between men and women. A cross-sectional survey was conducted using a convenience sample of 300 young adults from three Korean universities. Participants were 20-40 years of age, used smartphones, and took no sleep medication.

Preparation of NiO-YSZ Composite Powder Through 2-Step Hydrothermal Synthesis and Its Application to Solid Oxide Fuel Cell Anode Functional Layer.

NiO-YSZ composite powders were prepared by 2-step hydrothermal synthesis and applied as an anode functional layer to improve the performance of SOFCs. The precursor solution containing yttrium chloride, zirconium oxychloride, and nickel nitrate was hydrothermally treated at 100-130 degrees C for 36 h and then calcined at 900 degrees C for 4 h. The results of X-ray diffraction, Field-Emission Scanning Electron Microscope and Transmission Electron Microscope showed that the NiO (50-100 nm) and YSZ (200-300 nm) were successfully synthesized and these two phases were well separated with the weak agglomeration.

Influence of citric acid molar ratio on the sintering behavior of nanocrystalline BaCe0.8Sm0.2O(3-delta).

The samarium-doped barium cerate (BaCe0.8Sm0.2O(3-delta), BCS) nano crystalline powders were synthesized via citric-nitrate method.

Morphological and structural properties of electrospun Sm0.5Sr0.5CoO3-delta nanofibers.

Strontium-doped samarium cobaltite (Sm0.5Sr0.5CoO3-delta, SSC) fibers were successfully fabricated by electrospinning of a precursor gel derived from polyvinyl alcohol (PVA) and aqueous metal nitrate.

Characterization of La(0.8)Sr(0.2)MnO(3 +/-delta) nanopowders synthesized by aerosol flame synthesis for SOFC cathode.

Lanthanum strontium manganite (La(0.8)Sr(0.2)MnO(3 +/- delta), LSM) powders with a high specific surface area (55.