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在无形的LiPON薄膜中识别位,通过观察核间的近距离

Racha Bayzou¹, Julien Trébosc², Annie-Kim Landry³

¹Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, 59000 Lille, France.

Journal of magnetic resonance (San Diego, Calif. : 1997)

|August 16, 2023

概括

核磁共振 (NMR) 揭示了氧化 (LiPON) 薄膜中的原子结构. 这项研究澄清了位和离子结构,这对于理解固态电池中的LiPON电解质至关重要.

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:

无形酸氧化 (LiPON) 是薄膜固态微电池的关键电解质.
了解LiPON的原子层结构对于优化离子导电性至关重要.
之前的研究在解决LiPON的无形结构和P-31 NMR光谱方面遇到了挑战.

研究的目的:

用先进的NMR技术阐明LiPON薄膜的原子层结构.
在LiPON结构中识别 (P) 位点的特定局部环境.
为提高电池性能,将原子结构与离子导电性相关联.

主要方法:

使用了固态核磁共振 (NMR) 光谱,包括魔法角旋转 (MAS).
在双共振中使用人口转移 (TRAPDOR) 来探测P-14N附近.
应用了1D P-31双量子 (DQ) 过和2D P-31同核相关性谱,以及DQ-DRENAR实验,以调查P-31的近距离.

主要成果:

核间近距离的NMR观测成功地在LiPON薄膜中确定了不同的P位.
对P-31NMR光谱的定量分析显示了PO4{3-) орто酸盐离子的普遍存在.
发现原子主要被纳入[O3PNPO3](5-) 二次离子中,少量PO3N(4-) 和[O3POPO3](4-) 离子.

结论:

这项研究提供了对LiPON薄膜的详细原子层结构理解.
这些发现支持最近对P-31 NMR信号的赋值,并澄清了N结合的作用.
这种结构洞察对于开发基于LiPON的先进固态电解质至关重要.

关键词:

(31) P NMR 是一种NMR.(31) P-(14) N近距离的距离 (31) P-(31) P 接近的距离利邦 (LiPON) 是一种薄膜是一种薄膜.固态NMR是一种固态NMR.

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