Amorphous and perovskite Li3xLa(2/3)?xTiO3 (thin) films via chemical solution deposition: solid electrolytes for all-solid-state Li-ion batteries

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• 作者：E. J. van den Ham ; N. Peys ; C. De Dobbelaere…
• 关键词：Solid ; electrolyte ; Thin films ; Aqueous CSD ; Li ; ion conductivity ; Half ; cell
• 刊名：Journal of Sol-Gel Science and Technology
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：73
• 期：3
• 页码：536-543
• 全文大小：894 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Ceramics,Glass,Composites,Natural Materials
  Inorganic Chemistry
  Optical and Electronic Materials
  Nanotechnology
  
• 出版者：Springer Netherlands
• ISSN：1573-4846

文摘

Thin films of amorphous and crystalline perovskite Li3xLa(2/3)?xTiO3 (LLT) (x?=?0.117) are prepared by means of aqueous chemical solution deposition onto rutile TiO2 thin films as an anode, yielding an electrochemical half-cell. The Li-ion conductivity of the pin-hole free, amorphous LLT thin film (90?nm thick) is 3.8?×?10??S?cm? on Pt and 1.3?×?10??S?cm? on rutile TiO2, while measuring perpendicular to the thin film direction with impedance spectroscopy. Grazing angle attenuated total reflectance-Fourier transform infrared spectroscopy shows that all organic precursor molecules have been decomposed at 500?°C. In addition, in situ (heating) X-ray diffraction analysis shows that phase pure crystalline perovskite LLT (x?=?0.117) is formed on top of the rutile TiO2 anode at 700?°C. Furthermore, thickness control is possible by varying the precursor solution concentration and the number of deposition cycles. The current study presents a promising synthesis route to develop all-solid-state battery devices based on multi-metal oxide materials using aqueous precursor chemistry.