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Abstract <p>The effect of 1–4 wt % boron oxide, which is considered to be a good sintering additive, on the morphology and ionic conductivity of Li<sub>1.2</sub>Al<sub>0.2</sub>Zr<sub>0.1</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> with a NASICON structure has been studied. The resulting materials have been investigated by X-ray powder diffraction, scanning electron microscopy; Raman, IR, and impedance spectroscopy; solid state <sup>27</sup>Al, <sup>7</sup>Li, <sup>31</sup>P, and <sup>11</sup>B MAS NMR. It has been shown that the introduction of B<sub>2</sub>O<sub>3</sub> at the stage of synthesis of Li<sub>1.2</sub>Al<sub>0.2</sub>Zr<sub>0.1</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> leads to materials doped with boron ions. The sample containing 2% boron oxide exhibits the highest conductivity (2.9 × 10<sup>–4</sup> S/cm) at 25°C. At the same time, adding B<sub>2</sub>O<sub>3</sub> to Li<sub>1.2</sub>Al<sub>0.2</sub>Zr<sub>0.1</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub>, where boron oxide is localized mainly at the interfaces, leads to the release of LiTiPO<sub>5</sub> impurity and does not have a significant effect on the conductivity of the resulting samples.</p>

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Effect of Boron Oxide on the Ionic Conductivity of the Li1.2Al0.2Zr0.1Ti1.7(PO4)3 Ceramics with a NASICON Structure

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • A. B. Pyrkova,
  • I. A. Stenina,
  • A. B. Yaroslavtsev

摘要

Abstract

The effect of 1–4 wt % boron oxide, which is considered to be a good sintering additive, on the morphology and ionic conductivity of Li1.2Al0.2Zr0.1Ti1.7(PO4)3 with a NASICON structure has been studied. The resulting materials have been investigated by X-ray powder diffraction, scanning electron microscopy; Raman, IR, and impedance spectroscopy; solid state 27Al, 7Li, 31P, and 11B MAS NMR. It has been shown that the introduction of B2O3 at the stage of synthesis of Li1.2Al0.2Zr0.1Ti1.7(PO4)3 leads to materials doped with boron ions. The sample containing 2% boron oxide exhibits the highest conductivity (2.9 × 10–4 S/cm) at 25°C. At the same time, adding B2O3 to Li1.2Al0.2Zr0.1Ti1.7(PO4)3, where boron oxide is localized mainly at the interfaces, leads to the release of LiTiPO5 impurity and does not have a significant effect on the conductivity of the resulting samples.