High Li⁺ conduction in NASICON-type Li_1+xY_xZr_2?x(PO₄)₃ at room temperature

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• 作者：Yutao Li ; Meijing Liu ; Kai Liu ; Chang- An Wang
• 关键词：Li solid electrolyte ; NASICON ; Li-ion battery ; Ionic conductivity
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：15 October, 2013
• 年：2013
• 卷：240
• 期：Complete
• 页码：50-53
• 全文大小：882 K

文摘

The NASICON oxides with general formula Li_1+xY_xZr_2?x(PO₄)₃ (0.1?¡Ü?x?¡Ü?0.2) are prepared by conventional solid-state reaction. The samples are characterized by XRD, SEM, electrochemical impedance spectroscopy and ⁷Li MAS NMR measurements. The structures are refined by the Rietveld method from powder X-ray diffraction data. With the introduction of Y³⁺, the volume of the large M1 cavity is reduced and the rhombohedral NASICON phase is stabilized at room temperature. The bulk and total Li⁺ conductivities of Li_1.15Y_0.15Zr_1.85(PO₄)₃ sintered by SPS are 1.4?¡Á?10^?4 and 0.71?¡Á?10^?4?S?cm^?1 at 25?¡ãC, respectively; the activation energy is about 0.39?eV in the temperature range 300-473?K.