高的阿吉罗代特固体电解质使稳定的全固态电池成为可能
Shenghao Li1, Jing Lin2, Mareen Schaller3
1Center of Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing &, School of Material Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China.
固体电解质中的配置对离子流动性产生了积极的影响. 这项研究表明,调整 argyrodites 中的复杂成分可以提高先进固态电池的离子导电性.
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:
- 超离子固体电解质 (SE) 对固态电池 (SSB) 的发展至关重要.
- 了解配置 (ΔSconf) 在多元件SE的离子导电性中的作用至关重要,但缺乏.
- argyrodites 是一个有前途的SE材料.
研究的目的:
- 为了研究具有素丰富的 argyrodites的配置和离子导电性之间的相关性.
- 为了合成和表征一系列Li5.5 PS4.5 Clx Br1.5-x化合物.
- 展示这些材料在高性能SSB中的潜力.
主要方法:
- 合成富含素的氧化 (Li5.5 PS4.5 Clx Br1.5-x) 的合成.
- 中子粉衍射和P魔法角旋转核磁共振光谱学用于结构和组成分析.
- 在室温下测量离子导电性.
主要成果:
- 在子子网上对S2-/Cl-/Br占用量的定量分析.
- 阳性相关性观察到阴离子子网乱 (ΔSconf) 和离子动态.
- 在室温下达到了22.7mS cm-1的离子导电率,对于Li5.5 PS4.5 Cl0.8 Br0.7 (ΔSconf =1.98R).
- 在SSB细胞中使用优化SE.90的SSB单晶LiNi0.9Co0.06Mn0.04O2 (s-NCM90)复合阴极的稳定循环证明.
结论:
- 首次实验证据将离子子子网的配置与SEs中的离子流动性联系起来.
- 定制组合复杂性是提高陶离子导体中的离子导电性的可行策略.
- 双替代 argyrodites显示出对高性能电化学储能应用的显著前景.
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