运输研究用化物合的阿吉罗石作为固态电池的电解质
Dominika A Buchberger1, Piotr Garbacz1, Krzysztof Słupczyński1
1Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
ACS applied materials & interfaces
|November 3, 2023
概括
对固态电池的Li6PS5Cl进行调查,发现了激活能量差异. 样品的准备和电解质的厚度对于精确的离子导电性和电池中更快的离子扩散至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 固态化学 固态化学
背景情况:
- 与传统的离子电池相比,全固态电池 (ASSB) 提供了更高的安全性和能量密度.
- 由于其高离子导电性,Li6PS5Cl是ASSB的有前途的固体电解质材料.
- 精确确定激活能量和离子导电性对于优化ASSB性能至关重要.
研究的目的:
- 使用补充技术研究Li6PS5Cl的激活能量和离子导电性.
- 为了比较从固态核磁共振 (NMR) 和电化学阻抗光谱 (EIS) 获得的激活能量值.
- 为了评估样品制备和厚度对离子运输特性的影响.
主要方法:
- 固态核磁共振 (NMR) 光谱 (温度依赖的核放松率).
- 电化学阻抗光谱学 (EIS) (取决于温度的测量).
- 密度函数理论 (DFT) 用于离子跳跃的理论建模.
主要成果:
- 来自NMR放松率的激活能量低于来自EIS测量的激活能量.
- 在Li6PS5Cl中的离子导电性取决于晶体大小和单元细胞参数.
- 薄膜样本显示激活能量与NMR一致,与厚颗粒不同,表明较厚的电解质中的限制过程.
- DFT计算支持了关于离子跳跃的实验发现.
结论:
- 样品制备方法对固体电解质中激活能量和离子导电性测量的准确性产生重大影响.
- 固态电解质厚度是实现ASSB中更快的离子扩散的关键设计参数.
- 了解这些因素对于开发下一代固态电池至关重要.
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