Abstract We report on the ion transport properties of Li1+xZr2-xYx(PO4)3 (0.05 ≤ x ≤ 0.2) NASICON type nanocrystalline compounds prepared through a Pechini-type polymerizable complex method. Structural properties were characterized by means of powder X-ray diffraction, Raman spectroscopy and electron microscopy with selected area electron diffraction. Impedance spectroscopy was utilised to investigate the lithium ion transport properties. Y3+ doped LiZr2(PO4)3 compounds showed stabilized rhombohedral structure with enhanced total ionic conductivity at 30 °C from 2.87 × 10−7 S cm−1 to 0.65 × 10−5 S cm−1 for x=0.05 to 0.20 respectively. The activation energies of Li1+xZr2-xYx(PO4)3 show a decreasing trend from 0.45 eV to 0.35 eV with increasing x from 0.05 to 0.20. The total conductivity of these compounds is thermally activated, with activation energies and pre-exponential factors following the Meyer-Neldel rule. The tanδ peak position shifts to the high-frequency side with increasing yttrium content. Scaling in AC conductivity spectra shows that the electrical relaxation mechanisms are independent of temperature.

中文翻译：

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Pechini型可聚合络合物路线获得钇掺杂LiZr 2 (PO 4 ) 3 的离子传导和介电性能

摘要 我们报告了通过 Pechini 型可聚合复合方法制备的 Li1+xZr2-xYx(PO4)3 (0.05 ≤ x ≤ 0.2) NASICON 型纳米晶化合物的离子传输特性。结构特性通过粉末 X 射线衍射、拉曼光谱和具有选区电子衍射的电子显微镜表征。阻抗谱用于研究锂离子传输特性。Y3+ 掺杂的 LiZr2(PO4)3 化合物显示稳定的菱面体结构，在 30°C 下总离子电导率从 2.87 × 10-7 S cm-1 提高到 0.65 × 10-5 S cm-1，x=0.05 至 0.20。Li1+xZr2-xYx(PO4)3 的活化能随着 x 从 0.05 增加到 0.20 显示出从 0.45 eV 到 0.35 eV 的下降趋势。这些化合物的总电导率是热活化的，具有遵循 Meyer-Neldel 规则的活化能和指数前因子。随着钇含量的增加，tanδ 峰值位置向高频侧移动。交流电导率谱的缩放表明电弛豫机制与温度无关。