@article{Sun2026, 
author = {Lin Sun and Lijun Wang and Tianqi Wang and Yanyan Liu and Yunjing Qiao and Xuetao Lu and Miao Qi and Zhong Jin},
title = {Fluorinated MXene-engineered LiF-rich solid electrolyte interphase and hierarchical confinement strategy enabling high performance micro-sized silicon anodes},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {2},
pages = {94908024},
keywords = {micro-sized silicon, anode, MXene, solid electrolyte interphase (SEI), lithium-ion battery},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94908024},
doi = {10.26599/NR.2025.94908024},
abstract = {Silicon (Si) anodes, despite their exceptional theoretical capacity (~ 4200 mAh·g−1), face critical challenges, including severe volumetric expansion (> 300%) during lithiation and poor intrinsic conductivity, resulting in structural pulverization and unstable solid electrolyte interphase (SEI) formation. This work demonstrates a hierarchical confinement strategy integrating self-assembly and chemical vapor deposition (CVD) to construct microporous silicon-based composite anode material (mpSi-MGC) synergistically encapsulated by few-layer Ti3C2Tx (T = F, O, and OH) MXene, reduced graphene oxide (rGO), and CVD carbon coating. The multi-confinement architecture not only enhances mechanical stability but also optimizes electron (e−)/lithium ions (Li+) transport kinetics. Systematic ex situ analysis reveals that fluorine-functionalized groups in Ti3C2Tx significantly boost Li+ diffusion coefficients by promoting LiF-rich SEI formation, while the exterior CVD-carbon coating further stabilizes the hybrid structure. The optimized mpSi-MGC delivers exceptional Li storage performance: a high reversible initial capacity of 1800 mAh·g−1 at 0.2 A·g−1, remarkable cyclability with 992 mAh·g−1 retained after 200 cycles at 1.0 A·g−1, and superior rate capability (818 mAh·g−1 at 3 A·g−1). This multi-scale confinement design effectively mitigates volume expansion in micron-sized Si while enhancing e−/Li+ conductivity, offering a promising paradigm for developing high-energy-density lithium-ion batteries (LIBs) through rational structural engineering and interfacial optimization.}
}