Silver Nanocoating of LiNiCoMnO Cathode Material for Lithium-Ion Batteries.

Surface coating has become an effective approach to improve the electrochemical performance of Ni-rich cathode materials. In this study, we investigated the nature of an Ag coating layer and its effect on electrochemical properties of the LiNiCoMnO (NCM811) cathode material, which was synthesized using 3 mol.% of silver nanoparticles by a facile, cost-effective, scalable and convenient method.

Effect of Cationic (Na) and Anionic (F) Co-Doping on the Structural and Electrochemical Properties of LiNiMnCoO Cathode Material for Lithium-Ion Batteries.

Elemental doping for substituting lithium or oxygen sites has become a simple and effective technique to improve the electrochemical performance of layered cathode materials. Compared with single-element doping, this work presents an unprecedented contribution to the study of the effect of Na/F co-doping on the structure and electrochemical performance of LiNiMnCoO. The co-doped LiNaNiMnCoOF (z = 0.

Nanostructured Molybdenum-Oxide Anodes for Lithium-Ion Batteries: An Outstanding Increase in Capacity.

This work aimed at synthesizing MoO and MoO by a facile and cost-effective method using extract of orange peel as a biological chelating and reducing agent for ammonium molybdate. Calcination of the precursor in air at 450 °C yielded the stochiometric MoO phase, while calcination in vacuum produced the reduced form MoO as evidenced by X-ray powder diffraction, Raman scattering spectroscopy, and X-ray photoelectron spectroscopy results. Scanning and transmission electron microscopy images showed different morphologies and sizes of MoO particles.

Amorphous MoO-Type/Carbon Nanocomposite with Enhanced Electrochemical Capability for Lithium-Ion Batteries.

An amorphous MoO/carbon nanocomposite (m ≈ 5) is fabricated from a citrate-gel precursor heated at moderate temperature (500 °C) in inert (argon) atmosphere. The as-prepared MoO-type/C material is compared to α-MoO synthesized from the same precursor in air. The morphology and microstructure of the as-prepared samples are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman scattering (RS) spectroscopy.

Silver/quartz nanocomposite as an adsorbent for removal of mercury (II) ions from aqueous solutions.

Silver nanoparticles (AgNPs) and silver/quartz nanocomposite (Ag/Q)NPs)) were synthesized by sol-gel method using table sugar as chelating agent. The synthesized nanosized materials were used for mercury ions adsorption from aqueous solutions The materials were characterized by X-ray diffraction (XRD), Transmission Electron microscope (TEM), and surface area (BET). Adsorption of Hg (10 mg/l) is strongly dependent on time, initial metal concentration, dose of adsorbent and pH value.