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For the purpose of obtaining an improved performance of the graphite negative electrode of Li-ion batteries, a novel graphite–tin composite has been synthesized by reduction of tin chloride (SnCl 2 ) with KC 8 in THF medium. This composite contains nano-sized tin particles dispersed on the graphite surface and free tin aggregates. Lithium electrochemical insertion occurs both in graphite...
Carbon spheres (CSs) have been subjected to a high temperature annealing process at 2800°C under an Ar atmosphere. These high temperature annealed carbon spheres (HTACSs) have been characterised by SEM, HRTEM, BET surface area, XRD, Raman, SQUID and TGA techniques. The study indicates that the original spheroidal morphology of CSs have been converted to polyhedral. The graphitic flakes possessing...
A simple and efficient route to decorate carbon nanotubes (CNTs) with nanocrystalline RuO 2 has been developed. In this method, RuCl 3 ·3H 2 O was oxidized into RuO 2 by oxygen in supercritical diethyl amine, and the produced RuO 2 deposited on CNTs, resulting in RuO 2 /CNT nanocomposites. The as-prepared composites were structurally and morphologically...
Carbon nanofibers (CNFs) have been synthesized by co-catalyst deoxidization process by a reaction between C 2 H 5 OC 2 H 5 , Zn and Fe powder at 650°C for 10h. These nanofibers exhibit diameters of ∼80nm and lengths ranging from several micrometers to tens of micrometers. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy indicate...
Electrochemical lithium insertion was carried out in tin–graphite composites obtained by two different preparation processes. In the first graphite was mixed with the products obtained by reduction of SnCl 4 with Na tert-Butanoate (t-BuONa)-activated NaH (two-step synthesis). The second used materials synthesized by reducing SnCl 4 with a graphite and (t-BuONa)-activated NaH suspension...
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