Distinction between energetic inhomogeneity and geometric non-uniformity of ion insertion electrodes based on complex impedance and complex capacitance analysis

Article Abstract:

Electrochemical insertion of Mg ions into Mo6S8 Chevrel phase is a unique, model system for studying the nature of the energetic inhomogeneity of the host sites suitable for ions accommodation. A demonstration that the two energy state model could be successfully used for describing the very specific Mg ions insertion kinetics into the host, in particular, as relates to a drastic increase of Mg ions mobility in the vicinity of the critical potential of 1.25 V.

Israel, Analysis, Observations, Electrochemistry, Capacitance

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Mg-catalyzed autoclave synthesis of aligned silicon carbide nanostructures

Article Abstract:

A novel magnesium-catalyzed co-reduction route is developed for the large-scale synthesis of aligned beta-SiC one-dimensional (1D) nanostructures at relative lower temperature. The as-synthesized beta-SiC nanostructures have displayed strong shape-dependent field emission properties and corresponding to their shapes, these nanorods and nanoneedles have displayed the turn-on fields of 12, 8.4 and 1.8 V/mum, respectively.

Silicon Carbide, Silicon carbides, Chemical properties

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New type of phase transformation in gas hydrate forming system at high pressures. Some experimental and computational investigations of clathrate hydrates formed in the SF6-H2O system

Article Abstract:

A new, previously unknown type of structure transformation in the high-pressure gas hydrates, which is related to the existence of two different isostructural phases of the sulfur hexafluoride clathrate hydrates are presented. Results indicate that the increase of population of small cavities is improbable, therefore, at any pressure value, a part of the cavities remains vacant and the packing density is relatively low.

Sulfur Hexafluoride, Phase transformations (Statistical physics), Phase transitions (Physics), Gas hydrates, Sulphur hexafluoride

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