Published in
Trans Tech Publications, Key Engineering Materials, (301), p. 91-94, 2006
DOI: 10.4028/www.scientific.net/kem.301.91
Trans Tech Publications, Key Engineering Materials, p. 91-94
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Preparation of Lithium Ion Conductive Li<sub>4.2</sub>Al<sub>0.2</sub>Si<sub>0.8</sub>O<sub>4</sub> Thin Films Using Sol-Gel Process
,
Jun Ichi Hamagami,
M. Miyayama,
Takashi Takei,
Kiyoshi Kanamura,
M. Takata,
K. Shinozaki
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Abstract
Thin films of lithium ion conductive ceramic Li4+xAlxSi1-xO4 were fabricated on Au substrate using sol-gel process. The sol of Li-Al-Si-O was spread on Au substrate using a spin coater, and it was gelated at room temperature. The gel was calcinated at 400 °C and heat-treated at high temperatures between 500 °C and 800 °C in air. The addition of poly(vinylpyrrolidone) (PVP) was effective in stabilizing the sol. Furthermore, the morphology of the obtained thin film was changed by the PVP additive. Li4+xAlxSi1-xO4 thin film prepared at 800 °C exhibited a Li+ ion conductivity of 10-8 S cm-1 at room temperature.