Replacement of graphite with alloying and conversion materials, having high specific capacity, has emerged as versatile route to increasing the energy density Li-ion batteries. A key challenge is large volume change in these which leads an unstable solid electrolyte interphase (SEI). The use sacrificial additives, such fluoroethylene-carbonate (FEC), been established effective strategy for cons...

In this study, at first step nanopowder particles of  α-Fe2O3 (Hematite) and  Co3O4 were synthesized separately thorough simple chemical method from an aqueous solution of iron (III) nitrate nonahydrate (Fe(NO3)3.9H2O) and cobalt (II) hexahydrate (Co(NO3)2.6H2O) as  precursors.  After that, three composites nanopowders Fe2O3 with 8, 16 24 wt.% prepared. Graphite was added to one composition sam...

Graphite-silicon (Gr-Si) blends have become common in commercial Li-ion battery negative electrodes, offering increased capacity over pure graphite. Lithiation/delithiation of the silicon particles results volume changes, which may be associated with hysteresis open circuit potential (OCP). The OCP is a function both concentration and temperature. Entropy change measurement—which probes respons...

Ceramics-coated graphite powders are considered an effective raw material to fabricate the three-dimensional continuous ceramics skeleton reinforced matrix composites which can overcome their inherent poor densification, mechanical and antioxidation properties. However, morphology thickness regulation of ceramic coatings on particles still a great challenge. Herein, SiC-coated (graphite@SiC) we...

This study investigates the impact of carbon on kinetics spark plasma sintering (SPS) nano- and submicron powders WC-10 wt.%Co. Carbon, in form graphite, was introduced into by mixing. The activation energy solid-phase determined for conditions isothermal continuous heating. It has been demonstrated that increasing content leads to a decrease fraction ?-phase particles shift shrinkage curve tow...

The osteogenic differentiation of mesenchymal stem cells (MSCs) was assessed by determining the gene expression levels of proteins; osteocalcin (OSC), osteonectin (OSN) and osteopontin (OSP) based on electrochemical detection protocol combined with genomagnetic assay in parallel to real-time PCR analysis. Genomagnetic assay was performed using streptavidin coated commercial magnetic particles (...

DOI: 10.1002/aenm.201400753 techniques. This is due to the heavy weight of the metal current collectors and the use of binders. [ 1,2 ] To improve the overall specifi c capacity of an electrode, high capacity active materials and light-weight current collectors should be used. With ten times higher theoretical capacity, abundance, non-toxicity, and low cost, Si has attracted extensive attention...

Large-scale production of conical carbon nanostructures is possible through pyrolysis of hydrocarbons in a plasma torch process. The resulting carbon cones occur in five distinctly different forms, and disc-shaped particles are produced as well. The structure and properties of these carbon cones and discs have been relatively little explored until now. Here we characterize the structure of thes...

In this study, the effect of microstructural characteristics on mechanical properties high-chromium white cast iron-matrix composites reinforced by in situ TiC and ex WC was investigated. To end, two different powder mixtures (Ti + Al graphite Fe) were compressed to produce green compacts that inserted into mold, before casting. The microstructure resulting base metal characterized using optica...

In order to compare and evaluate the atomization process occurring in several types of graphite furnaces for atomic absorption spectrometry, the authors estimated temporal variations in the gas temperature by using a two-line method under the assumption of a Bolzmann distribution. The atomization furnaces employed were a graphite tube, a graphite tube coated with pyrolitic carbon, a graphite tu...