Lithium Instertion in poly (ethylene oxide )/MoO3 Xerogel Nanocomposite Films

The nanocomposite films were prepared by direct intercalation of poly (ethylene oxide) and PEO into MoO3 xerogel via sol-gel route,The electrochromic behavior and the chemical conditionws of Li^ ions were investigated by cyclic voltammograms,UV-visible spectral transmittance and XPS,The tesults show that the cycling efficiency and the reversibility of insertion/extraciton of Li^ ions in (PEO)1 MoO3 .nH2O nanocomposite film were improved.The intercalation of PEO into MoO3 xerogel modulated the wavelength range of electrochromism and enhanced the electrochromic efficiney,Two different chemical conditions of Li^ ions existing in the interlayer and interstitial positions of MoO3 lattice were observed in MoO3 XEROGEL AND (PEO)1 MoO3.nH2O naocomposite films.     

Nanocomposite Films of V_2O_5-MoO_3 Xerogel with Poly Ethylene Oxide Intercalation

1　IntroductionItiswell establishedthatsomeinorganiclayeredcompoundssuchasMoO3 ,V2 O5canbeintercalatedbyavarietyofalkaliions (Li+ ,Na+ ,etc .) ,atomsandlargermoleculestoformintercalationhost guestcompounds ,whichareexpectedtobeusedaspotentialcathodicmate rialsinsecondaryLibatteriesandelectrochromicdevice s[1] .Thepolymer layeredoxidenanocompositeshaveat tractedmuchattentionduetotheirspecialstructureaswellassuperiorelectrical,electrochemicalandopticalproperties .Recently ,nanocompositesof (P…     

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

1　IntroductionSomeinorganiclayeredcompounds ,suchasMoO3 andV2 O5,belongtoarapidlygrowingfieldofcontempo raryresearchinterest,becausetheycanbeintercalatedbyavarietyofalkaliions (Li+ ,Na+ ,etc .) ,atomsorlargermoleculestoformintercalationhost guestcompounds ,whichareexpectedtobepromisingcandidatematerialsforcathodesofsecondaryLibatteriesandelectrochromicdevices[1] .Polymer layeredoxidenanocompositesareat tractingmuchattentionduetotheirspecialstructureaswellassuperiorelectrical,electrochemical…     

Preparation of Poly (ethylene oxide)(PEO)Modified Tungsten Oxide Hybrid Films via Sol-Gel Processing

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｏｌ ｇｅｌｍｅｔｈｏｄｈａｓａｔｔｒａｃｔｅｄｓｐｅｃｉａｌｉｎｔｅｒｅｓｔｒｅ ｃｅｎｔｌｙｉｎｔｈｅｐｒｅｐａｒａｔｉｏｎｔｅｃｈｎｏｌｏｇｙｏｆｎｅｗｍａｔｅｒｉａｌｓｐｒｅ ｐａｒｅｄｂｙｃｏｍｂｉｎｉｎｇｏｒｇａｎｉｃａｎｄｉｎｏｒｇａｎｉｃｍａｔｅｒｉａｌｓ[1,2 ] .Ｔｈｅｓｏｌ ｇｅｌｐｒｏｃｅｓｓｉｓｂａｓｉｃａｌｌｙａｈｙｄｒｏｌｙｓｉｓａｎｄｃｏｎｄｅｎｓａ ｔｉｏｎｐｏｌｙｍｅｒｉｚａｔｉｏｎｒｅａｃｔｉｏｎｏｆｍｏｌｅｃｕｌａｒｐｒｅｃｕｒｓ…     

Electrochemical Properties of Poly(ethylene oxide )(PEO) Doped TiO_2-PEO Films Prepared by Sol-gel Dip Coating Technique

PEO modified Ti02 -PEO organic-inorganic hybrid thin films were prepared via, sol-gel dipping process on glass substrate pre-coated with ITO. The preparation parameters were studied. Electrochemical and optical properties of the films were characterized by cyclic voltammetric response and visible transmittance. X-ray diffraction (XRD) was used to determined the crystalline structure of the gel. The results show the sols added with PEO have acceptable stable periods for practical use. The PEO modified optical transitivity of the hybrid films has heavy effects on the crystallization of TiO2 during structural evolution because of the interaction between PEO and Ti02 . PEO-TiO2 films have better electrochemical activity than the TiO2 equivalent behaved as higher Li insertion/extraction current density and cyclic reversibility.     

Nanocomposite films of V<Subscript>2</Subscript>O<Subscript>5</Subscript>−MoO<Subscript>3</Subscript> xerogel with poly ethylene oxide intercalation

Poly ethylene oxide (PEO)_x−V₂O₅−V₂O₅−MoO₃ (x=0, 0.5, 1) films were prepared by the sol-gel method. The synthesis and structure of the films were investigated by XRD, TG-DTA, FTIR, etc. The results show that V₂O₅−MoO₃ xerogel has a layered structure and its interlayer space increased from 1.3181 nm at x=0 to 1. 7898 nm at x=1 after the nanocomposite films were dried, and PEO in the interlayer changes the interface structure by forming hydrogen bonds with V=0 bands. CV measurement indicates that the intercalation of PEO improves insertion/extration properties of Li⁺ ions in the interlayer. ZHENG Jin-xia: Born in 1976 Funded by the National Natural Science Foundation of China (No. 50172036) and Natural Science Foundation of Hubei Province(No. 2001ABB083)