Preparation and Characterization of Superionic Conductive Li₂O-Al₂O₃-La₂O₃-TiO₂-P₂O₅ Glass-Ceramics

Abstract:

Li₂O-Al₂O₃(La₂O₃)-TiO₂-P₂O₅ glass-ceramics were fabricated through heat-treatment of the original glass. The differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical workstation were employed to study the structural, morphology and electrical properties of the samples heat-treated at different temperatures. The results showed that: the glass-ceramics consist of the dominating LiTi₂(PO₄)₃ phases, trifle AlPO₄, TiO₂ and unknown phases. With the heat-treatment temperature increasing from 700 °C to 1100 °C, the structure of glass-ceramic become denser and grain grew, lithium ion conductivity increased quickly and subsequent cut down gradually. While the specimen was obtained by crystallization at 900 °C for 12 h, the total conductivity of glass-ceramic material come up to the maximum (5.85 ×10^-4 S•cm^-1) at 25 °C. This inorganic solid electrolyte has a potential application in lithium batteries or other devices.

• Periodical: Key Engineering Materials (Volume 509)
• Pages: 314-320
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.509.314
• Online since: April 2012
• Authors: Hong Ping Chen, Hai Zheng Tao, Qi De Wu, Xiu Jian Zhao
• Keywords: Glass-Ceramic, Nasicon, Solid Electrolyte

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