Xerogels vanadium pentoxide

Figure 8. (a) Structure of the two-layer structure found in xerogel, and (b) comparison of the electrochemical behavior of the crystalline, xerogel,ct>-phase, and aerogeh forms of vanadium pentoxide. 

Spectroelectrochemical analysis of charge-insertion nanostructured materials already offers important insight into these systems. These methods were recently exploited to characterize the electrochemical processes of nanostructured manganese oxide ambi-gel and xerogel films. " 6-229 Spectroelectrochemical measurements were used to corroborate electronic state changes with the observed electrochemical response for the insertion of small cations (Li+, Mg2+) and the unexpected insertion of a bulky organic cation (tetrabutylammonium). Vanadium pentoxide exhibits two distinct electrochromic features that can be assigned to the transition at either sto-... 

Vanadium pentoxide xerogels are very reactive layered host materials which can be intercalated by various means such as cation-exchange, acid-base chemistry, or redox reactions. Vanadium pentoxide xerogel was prepared by polymerization of HVO3 after a few days of reaction at room temperature. The resultant xerogel... 

Figure 6.9 Lamellar arrangement of PE0/V20s.nH20 composite. (Reprinted with permission from Chemistry of Materials, Intercalation of poly(ethylene oxide) in vanadium pentoxide (V2O5) xerogel by Y. J. Liu, D. C. DeCroot, J. L. Schindler et al., 3, 6. Copyright (1991) American Chemical Society)...

M.G. Kanatzidis, C.-G. Wu, H.O. Marcy, D.C. DeGroot, and C.R. Kannewurfi, Conductive polymer/oxide bronze nanocomposites. Intercalated polythiophene in vanadium pentoxide (V205) xerogels, Chem. Mater., 2, 222-224 (1990). 

Kanatzidis, M.G. Wu, C.-G. Marcy, H.O. DeGroot, D.C. Kannewurf, C.R. Conductive polymCT-oxide bronze nanocomposites intercalated polythiophene in V2O5 xerogels. CherrL Mater. 1990, 2, 222-224. Intercalation of polyfethylene oxide) in vanadium pentoxide xerogel. Chem. Mater. 1991, 3, 992-994. Synthesis, structure, and reactions of polyfethylene oxide)/V205 intercalative nanocomposites. Chem. Mater. 1996, 8, 525-535. 

The V2O5 System. Vanadium pentoxide films obtained by the sol-gel process have recently received a strong interest for their applications as reversible cathodes for Li batteries (Livage, 1991). Layered structures ofVaOs-l.bHaO xerogel have been shown to be efficient in reversible electrochemical storage of Li+ ions (Araki, 1983), via the reaction ... 

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