High lithium ion conductivity glass-ceramics in Li₂O–Al₂O₃–TiO₂–P₂O₅ from nanoscaled glassy powders by mechanical

详细信息    查看全文

• 作者：Xiaoxiong Xu ; Zhaoyin Wen ; Xuelin Yang ; Jingchao Zhang and Zhonghua Gu
• 关键词：Li⁺ conductor ; Mechanical milling ; Glass-ceramics ; Li_1.4Al_0.4Ti_1.6(PO₄)₃
• 刊名：Solid State Ionics
• 出版年：2006
• 出版时间：31 October 2006
• 年：2006
• 卷：177
• 期：26-32
• 页码：2611-2615
• 全文大小：484 K

文摘

Mechanical milling (MM) has been used to prepare the nanosized Li_1.4Al_0.4Ti_1.6(PO₄)₃ (denoted LATP) glassy powders, which was converted into glass-ceramics through thermal treating at 700–1000 °C. The XRD, TEM, FESEM and ac impedance techniques were used to characterize the products. The results showed that completely amorphous products were prepared by MM for 40 h, and single-phase LiTi₂(PO₄)₃-type structured glass-ceramics were obtained by further heat treatment. The lithium ion conductivity of the glass-ceramics increased with the growth of the crystalline phase and decrease of the grain size. The highest bulk conductivity (σ_b) of 1.09 × 10^{− 3} S cm^{− 1} with an energy of activation as low as 0.28 eV was obtained at room temperature for the specimen treated at 900 °C for 6 h. The high conductivity, easy fabrication and low cost make the LATP glass-ceramics promising to be used as inorganic solid electrolyte for all-solid-state Li-ion rechargeable batteries.