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A LiF-Pie-Structured Interphase for Silicon Anodes
DOI:10.1007/s40820-025-01832-y.png)
摘要
En 中文
硅(Si)因其高理论容量和丰富储量,是一种有前景的可充电电池负极材料,但其实际应用受到多孔固态电解质界面(SEI)持续生长的限制,导致容量衰减。在此,提出了一种LiF-Pie结构的SEI,其中LiF纳米微区被封装在有机交联硅烷基质的内层中。一系列先进技术,如冷冻电子显微镜、飞行时间二次离子质谱和基质辅助激光解吸/电离飞行时间质谱,为界面的形成机制、纳米结构和化学组成提供了详细的见解。通过这种SEI,LiCoO2||Si在100 mA g−1下循环300次后的容量保持率从49.6%显著提高到88.9%。这些发现提供了一种具有增强的(电)化学和机械稳定性的理想界面设计原则,这对于维持Si负极功能至关重要,从而显著提升了Si基负极的可靠性和实际应用。
Keyword:
Si anodes
Solid electrolyte interface
Electrolyte additive
期刊
IF:
36.3
论文数:
2.6K
被引数:
3.6W
机构
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