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Journal of Sol-Gel Science and Technology 26, 10711074, 2003 c 2003 Kluwer Academic Publishers. Manufactured in The Netherlands.
 

Summary: Journal of Sol-Gel Science and Technology 26, 10711074, 2003
c 2003 Kluwer Academic Publishers. Manufactured in The Netherlands.
Sol-Gel Synthesis of Vanadate-Based Thin Films
as Counter Electrodes in Electrochromic Devices
RICCARDO CECCATO
AND GIOVANNI CARTURAN
Department of Materials Engineering, University of Trento, Via Mesiano 77, 38050 Trento, Italy
Riccardo.Ceccato@ing.unitn.it
FRANCO DECKER AND FLORINDA ARTUSO
Department of Chemistry and "Istituto Nazionale di Fisica della Materia", University of Rome "La Sapienza",
P.le A. Moro 5, 00185 Rome, Italy
Abstract. V2O5-based thin films were prepared via the sol-gel method in order to obtain semiconductive films
suitable as counter electrodes in electrochemical devices (e.g. electrochromic windows). Different metal precursors
(nickel 2,4-pentanedionate, NiCl2, BiCl3, SbCl3) were added, after dissolution, into the starting vanadium oxo-
triisopropoxide solution in the presence of acetic acid as a chelating agent. Preventing different synthesis conditions
due to the ambient moisture, the hydrolysis reaction was carried out in controlled acidic conditions. Stable sols were
obtained and thin films were dipped on transparent substrates coated with a conductive layer (ITO, SnO2:F). Different
techniques were employed on as-prepared and heat treated (673 K) films, and the corresponding gels in order to
characterize the microstructural, surface and electrochemical features of the samples. Better results were obtained
for Ni/V oxides thin films: unless their charge capacity was not very high (10 mC/cm2

  

Source: Artuso, Florinda - Department of Environment, Global Change and Sustainable Development, ENEA

 

Collections: Energy Storage, Conversion and Utilization