纳西康膜具有高离子导电性,通过高温固态反应合成
Mihaela Iordache1, Anisoara Oubraham1, Irina Petreanu1
1National R&D Institute for Cryogenics and Isotopic Technologies-ICSI Ramnicu Valcea, Uzinei No. 4, 240050 Vâlcea, Romania.
Materials (Basel, Switzerland)
|February 24, 2024
概括
将多余的 (Na) 添加到NASICON陶膜中可以提高离子导电性. 10%的Na过剩,在1175°C烧结,为这些先进的离子导体产生了最佳的离子导电性.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 电化学 电化学 电化学
背景情况:
- 离子导体对于储能应用至关重要.
- 优化NASICON结构是改善离子导电性的关键.
- 过量的兴奋剂被探索以提高纳西康的性能.
研究的目的:
- 为了研究过多的对纳西康结构和离子运输的影响.
- 为了合成和描述不同含量的纳西康陶膜.
- 为了评估修改后的纳西康材料的离子导电性.
主要方法:
- 纳西康 (Na3Zr2Si2PO12) 的固态反应 (SSR) 合成,含有0%,5%和10%的过量Na.
- 使用动态光散射 (DLS),扫描电子显微镜 (SEM),X射线衍射 (XRD) 和BET表面积分析进行表征.
- 在室温下通过阻抗光谱测量离子导电性.
主要成果:
- 纳西康膜含有10%多余的Na,具有改善的结构性质.
- 为了提高导电性,在1175°C进行10小时的最佳烧结被确定.
- 优化后的10% Na-excess NASICON 膜实现了 4.72 × 10^-4 S/cm 的离子导电性.
结论:
- 过量的兴奋剂,特别是10%,显著改善了纳西康的离子导电性.
- 优化合成条件对于最大限度地提高纳西康离子导体的性能至关重要.
- 这项研究为开发用于电化学设备的基于NASICON的优质材料提供了途径.
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