一种用于硅阳极的liff饼结构界面相。

IF 36.3 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-07-07 DOI:10.1007/s40820-025-01832-y

Weiping Li, Shiwei Xu, Cong Zhong, Qiu Fang, Suting Weng, Yinzi Ma, Bo Wang, Yejing Li, Zhaoxiang Wang, Xuefeng Wang

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引用次数: 0

摘要

硅（Si）具有较高的理论容量和丰度，是一种很有前途的可充电电池负极材料，但由于多孔固体-电解质界面（SEI）的不断增长，导致容量衰减，阻碍了其实际应用。本文提出了一种LiF- pie结构的SEI，将LiF纳米结构域封装在有机交联硅烷基体的内层中。低温电子显微镜、飞行时间二次离子质谱、基质辅助激光解吸/电离飞行时间质谱等一系列先进技术为界面的形成机制、纳米结构和化学组成提供了详细的见解。使用这种SEI，在100 mA g-1下循环300次后，LiCoO2||Si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理想的界面设计原则，具有增强的（电）化学和机械稳定性，这对于维持Si阳极的功能至关重要，从而显著提高了Si基阳极的可靠性和实际应用。

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A LiF-Pie-Structured Interphase for Silicon Anodes

Article Highlights

A novel hierarchical solid electrolyte interface (SEI) structure is developed, featuring a lithium fluoride (LiF)-rich inner layer and a silane-based cross-linked matrix.
A comprehensive suite of advanced characterization techniques provides multi-scale insights into the structural and chemical composition of the LiF-Pie SEI.
The proposed SEI design significantly enhances cycling stability, achieving a capacity retention of LiCoO₂||Si increase from 49.6% to 88.9% after 300 cycles at a current density of 100 mA g⁻¹.

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.