Preparation and Characterization of La<sub>0.67–x </sub>Li<sub>3x </sub>TiO<sub>3</sub> Solid-State Electrolyte Used for Electrochromic Mirrors
- 1 Hanoi Pedagogical University 2, Phuc Yen, Vietnam
- 2 University of Engineering and Technology, Vietnam National University, Hanoi, Vietnam
- 3 Department of Science and Technology of Tuyen Quang Province, Tuyen Quang City, Vietnam
Abstract
With the aim of producing all-solid-state electrochromic mirrors, La 0.67 – x Li 3x TiO 3 (LLTO) and the WO 3 were prepared by electron beam deposition. The LLTO (with x = 0.11) powder was synthesized by thermally ball-grinding method and the Li + ionic conductivity of the LLTO ceramic targets was found to be of ca. 3.25 × 10 – 3 S/cm. Using LLTO targets for e-beam evaporation, 300 nm-thick films with the Li + ionic conductivity of 5.50 × 10 – 5 S/cm were deposited. Combining LLTO films with WO 3 /ITO and LiMn 2 O 4 layers, all-solid-state electrochromic mirrors with a laminar structure of Al/LiMn 2 O 4 /LLTO/WO 3 /ITO were prepared. The reversible reflectance of the mirrors was well controlled by applying polarized potentials onto the ITO electrode. The obtained results suggest useful applications for electrochromic windows working as a smart reflectance mirror that can be used for auto rear-view mirrors.
- Granqvist, C.G. (1995) Handbook of Inorganic Electrochromic Materials. Elsevier, Amsterdam.
- Granqvist, C.G., Azens, A., Heszler, P., Kish, L.B. and &OUML;sterlund, L. (2007) Nanomaterials for Benign Indoor Environments: Electrochromics for “Smart Windows”, Sensors for Air Quality, and Photo-Catalysts for Aircleaning. Solar Energy Materials and Solar Cells, 91, 355-365. http://dx.doi.org/10.1016/j.solmat.2006.10.011
- Inaguma, Y., Liquan, C., Itoh, C., Nakamura, T., Uchida, T., Ikuta, H. and Wakihara, M. (1993) High Ionic Conductivity in Lithium Lanthanum Titanate. Solid State Communi- cations, 86, 689-693. http://dx.doi.org/10.1016/0038-1098(93)90841-A
- Inaguma, Y., Chen, L., Itoh, M. and Nakamura, T. (1994) Candidate Compounds with Perovskite Structure for High Lithium Ionic Conductivity. Solid State Ionics, 70/71, 196-202. http://dx.doi.org/10.1016/0167-2738(94)90309-3
- Dokko, K., Akutagawa, K., Isshiki, Y., Hoshina, K. and Kanamura, K. (2005) Preparation of Three Dimensionally Ordered Macroporous Li0.35La0.55TiO3 by Colloidal Crystal Templating Process. Solid State Ionics, 176, 2345-2348. http://dx.doi.org/10.1016/j.ssi.2005.05.018
- Ibarra, J., Varez, A., Leon, C., Santamaria, J., Martinez, T.L.M. and Sanz, J. (2000) Influence of Composition on the Structure and Conductivity of the Fast Ionic Conductors La2/3-xLi3xTiO3 (0.03 ≤ x ≤ 0.167). Solid State Ionics, 134, 219-228. http://dx.doi.org/10.1016/S0167-2738(00)00761-X
- Li, C.L., Zhang, B. and Fu, Z.W. (2006) Physical and Electrochemical Characterization of Amorphous Lithium Lanthanum Titanate Solid Electrolyte Thin-Film Fabricated by E-Beam Evaporation. Thin Solid Films, 515, 1886-1892. http://dx.doi.org/10.1016/j.tsf.2006.07.026
- Trong, L.D., Thao, T.T. and Dinh, N.N. (2015) Characterization of the Li-Ionic Conductivity of La(2/3-x)Li3xTiO3 Ceramics Used for All-Solid-State Batteries. Solid State Ionics, 278, 228-232. http://dx.doi.org/10.1016/j.ssi.2015.05.027
- Dinh, N.N., Bich, V.T., Hoang, N.H. and Minh, L.Q. (1988) Photochromic Properties of Tungsten Trioxide Films Made by Electron Beam Deposition. Physica Status Solidi (a), 108, K157-K162.
- Cullity, B.D. (1978) Elements of X-Ray Diffraction. 2nd Edition, Addison-Wesley Publishing Company, Inc., Reading, MA, 102.
- Ahn, J.K. and Yoon, S.G. (2005) Characteristics of Amorphous Lithium Lanthanum Titanate Electrolyte Thin Films Grown by PLD for Use in Rechargeable Lithium Microbatteries. Electrochemical and Solid-State Letters, 8, A75-A78. http://dx.doi.org/10.1149/1.1843571