Sol–gel vanadium oxide thin films for a flexible electronically conductive polymeric substrate

In operando XAFS experiments on flexible electrochromic devices based on Fe(II)-metallo-supramolecular polyelectrolytes and vanadium oxide

“…The cyclovoltammetric scans indicate evolution of broad current waves between 0.7 V and 0.0 V, indicating that short-range structural ordering has just started to occur as it has already been found for spin-coated V-oxide sol-gel films [18]. In this potential range, two characteristic current waves developed in case of crystalline V-oxide films, each of them indicating the transformation of half of the mole of V 5 þ to V 4 þ oxidation state [21].…”

“…The V-oxide films were prepared from a 1 M solution of vanadium(V) oxoisopropoxide in isopropanol identical to the one used for low-temperature deposition of films via spin-coating in an earlier work [18]. For this study, the films were deposited by dip-coating on ITO-coated PET film of dimensions 5 Â 5 cm 2 .…”

Electrochromic thin films of sodium intercalated vanadium(V) oxide xerogels: Chemical bath deposition and characterization

“…1b). Since the IR spectroscopy can give valuable information on the change in the valence state of vanadium [41,42] we have further examined the IR spectra of the precipitate and film, both aged at different times, 20 days, 20 months and 3 years, and some of them are included in Fig. 2.…”

“…By IR spectroscopy it was established that the electrochemical reduction of V(V) from V 2 O 5 to V(IV) causes a considerable modification of the spectra as both the terminal V_O and bridging V\ \O\ \V stretching vibrations are mainly affected [41,42]. Therefore, in the presence of more V(IV) species we should expect a red shift of the band at 1012 cm −1 as well as a decrease in the intensity and frequency of the band at 761 cm −1 [41,42].…”

Zirconium dioxide nanofilled poly(vinylidene fluoride-hexafluoropropylene) complexed with lithium trifluoromethanesulfonate as composite polymer electrolyte for electrochromic devices

“…They are generally classified into liquid electrolytes, ceramic electrolytes, solid inorganic electrolytes and polymer electrolytes [7][8][9][10][11]. Based on previous studies, polymer electrolytes have been preferred and were tailored for advanced electrochemical systems especially for lithium-ion batteries and electrochromic applications [12,13]. They are preferred because of their processibility, mechanical strength, stability, flexibility, and wide range of working temperature [1].…”