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The Cu-doped LiFePO 4 with/without carbon coating was synthesized by solgel method. The material was characterized by X-ray diffraction, Raman spectroscopy, Scanning Electron Microscopy, Energy Dispersive Spectroscopy and its electrochemical properties were investigated by chargedischarge tests. For the carbon coated sample presents a high uniformity and a particle size around 50100 nm. Electrochemical tests show that the specified capacity was 102 mAh/g measured 0.25 C (1.5 mA) regime discharge rate, voltage range (2.53.7 V). Optimization of this composite would be required, but the Cu doping and carbon coating to LiFePO 4 showed a promising material for use as cathode material in lithium ion battery.

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Doped GaSb (Gallium Antimonide) films on p‐GaSb substrates have been obtained by means of a low‐cost and fast‐growth method: the liquid phase epitaxy (LPE) technique. The growth temperature was 400 °C, and the growth time was varied between1 and 5 min. Characterization of the films was performed by means of high resolution X‐ray Diffraction, low temperature‐photoluminiscence and current‐voltage curve measurements. The X‐ray diffraction pattern confirms a zincblende‐type crystal structure with a high‐thin peak centred at 30.36°. The PL spectra at 27 K allowed to confirm the band‐gap energy to be 0.8 eV and the I‐V curves presented a PN junction behavior which corresponds to the obtained structured. Metal contacts of Au‐Zn and Au‐Ge were placed to perform electrical characterization (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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