Abstract
Vanadium oxide gels can be made from vanadate aqueous solutions or from vanadium alkoxides. The condensation of vanadic acid gives long ribbon-like oxide particles which macroscopically orient in the same direction in aqueous sols when their concentration is larger than 0.12 mol·l−1. These anisotropic sols and gels should be considered as lyotropic nematic liquid crystals. Thick films in which ribbons align along the same direction can be deposited. These oriented coatings exhibit improved electrochemical properties as reversible cathodes for lithium batteries. Amorphous oxo-polymers are formed via the controlled hydrolysis of vanadium alkoxides. They allow the deposition of optically transparent thin films that exhibit interesting electrochromic properties and turn reversibly from yellow to green upon electrochemical reduction. Moreover these alkoxide derived films can be easily reduced into vanadium dioxide. These VO2 thin films exhibit thermochromic properties and could be used as optical switches in the infrared. The transition temperature of these VO2 films can be modified by doping the vanadium oxide with other cations.
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References
J. Livage, Chem. Mater.3, 578 (1991).
F.J. Morin, Phys. Rev. Lett.3, 34 (1959).
P. Aldebert, N. Baffier, N. Gharbi, and J. Livage, Mat. Res. Bull.16, 669 (1981).
J.K. Bailey, G.A. Pozarnsky, and M.L. McCartney, J. Mater. Res.7, 2530, (1992).
J.J. Legendre and J. Livage, J. Colloid and Interface Sci.94, 75 (1983).
N. Gharbi, C. Sanchez, J. Livage, J. Lemerle, L. Nejem, and J. Lefebvre, Inorg. Chem.21, 2758 (1982).
H. Zocher, Z. Anorg. Allg. Chem.147, 91 (1925).
P. Davidson, A. Garreau, and J. Livage, Liquid Crystals16, 905 (1994).
P. Davidson, C. Bourgaux, L. Schoutteten, P. Sergot, C. Williams, and J. Livage, J. de Phys.10, 1577 (1995).
P.G. de Gennes and J. Prost, inThe Physics of Liquid Crystals, 2nd ed. (Clarendon Press, 1993), p. 163.
C. Viney and W.S. Putnam, Polymer36, 1731 (1995).
F. Livolant, J. de Physique48, 1051 (1987).
K. West, B. Zachau-Christiansen, M.J.L. Ostergard, and T. Jacobsen, J. Power Sources20, 165 (1987).
R. Baddour, J.P. Pereira-Ramos, R. Messina, and J. Perichon, J. Electroanal. Chem.,277, 359 (1990).
R. Baddour, J.P. Pereira-Ramos, R. Messina, and J. Perichon, J. Electroanal. Chem.,314, 81 (1991).
B. Araki, C. Mailhe, N. Baffier, J. Livage, and J. Vedel, Solid State Ionics9–10, 439 (1983).
M. Nabavi, C. Sanchez, and J. Livage, Eur. J. Solid State Inorg. Chem.28, 1173 (1991).
M. Nabavi, S. Doeuff, C. Sanchez, and J. Livage, Materials Science and EngineeringB3, 203 (1989).
K. Nagase, S. Izaki, Y. Shimizu, N. Miura, and N. Yamazoe, J. Mater. Chem.4, 1581 (1994).
J.B. Goodenough, J. Solid State Chem.3, 490 (1971).
J.B. McChesney and H.J. Guggenheim, J. Phys. Chem. Solids30, 225 (1969).
R.S. Potember and K.R. Speck, Sol-Gel Optics, SPIE1328, 364 (1990).
C.B. Greenberg, Thin Solid Films110, 73 (1983).
G. Guzman, R. Morineau, and J. Livage, Mater. Res. Bull.29, 509 (1994).
G.A. Nyberg and R.A. Buhrman, Thin Solid Films147, 111 (1987).
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Livage, J., Guzman, G., Beteille, F. et al. Optical properties of sol-gel derived vanadium oxide films. J Sol-Gel Sci Technol 8, 857–865 (1997). https://doi.org/10.1007/BF02436951
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DOI: https://doi.org/10.1007/BF02436951