title: ZnO particles of wurtzite structure as a component in ZnO/carbon nanotube composite.
abstract: Composites based on carbon nanotubes and ZnO particles with needle shapes were prepared for applications in energy storage. Depending on the temperature (85 or 25 °C) at which the reaction between NaOH and ZnCl(2) was carried out, particles with two different morphologies: needle-shaped (NS) and double-pyramid-shaped (DPS), respectively, are obtained. Scanning electron microscopy, photoluminescence, UV-Vis absorption spectroscopy, x-ray diffraction and Raman light scattering studies reveal that the NS and DPS particles belong to ZnO with wurtzite (WZ) structure and ε-Zn (OH)(2) as precursors of ZnO, respectively. Using the ZnO/carbon nanotube composite as a negative electrode and an electrolytic solution containing LiPF(6), the charge-discharge characteristics of rechargeable lithium ions cells were determined. Additional information concerning the electrochemical reactions at the interface of the two electrodes was obtained by cyclic voltammetry.
authors.affiliation: National Institute of Materials Physics, Laboratory of Optics and Spectroscopy, PO Box MG-7, RO-77125 Bucharest, Romania.
authors.forename: M
authors.initials: M
authors.lastname: Baibarac
authors.forename: I
authors.initials: I
authors.lastname: Baltog
authors.forename: T
authors.initials: T
authors.lastname: Velula
authors.forename: I
authors.initials: I
authors.lastname: Pasuk
authors.forename: S
authors.initials: S
authors.lastname: Lefrant
authors.forename: N
authors.initials: N
authors.lastname: Gautier