Synthesis and Characterization of (PEO)_x-(V_(0.85)Mo_(0.15))_2O_5 Nanocomposite Films

摘要

(PEO)_x-(V_(0.85)Mo_(0.15))_2O_5 (x=0,0.5,1.0) nanocomposite films were prepared by a modified sol-gel method. The structure of the films was analyzed by XRD, and the DC electrical conductivity. Cyclic voltammogram and optical spectral transmittance were investigated. The results show that the (V_(0.85)Mo_(0.15))_2O_5 xerogel has a layered structure and its interlayer space increased from 1.3181 nm at x =0 to 1.7897 nm at x= 1.0. The introduction of MoO_3 improved the DC electrical conductivities of the films due to the generation of V~(4+) to maintain the electrical neutrality of the oxides. PEO intercalated in the interlayer of (V_(0.85)Mo_(0.15))_2O_5 oxides has interaction with the oxides, enhancing the amount of Li~+ ions inserted into the interlayer of the oxides. Moreover, the intercalation of PEO into the interlayer of (V_(0.85)Mo_(0.15))_2O_5 oxides improved the cathodic electrochromic property in near ultraviolet region and anodic electrochromic property in visible range.