article published yes Jing Li author Guifang Zeng author Sharona Horta author 03a7e858-01b1-11ec-8b71-99ae6c4a05bc Paulina R. Martínez-Alanis author Jordi Jacas Biendicho author Maria Ibáñez author 43C61214-F248-11E8-B48F-1D18A9856A870000-0001-5013-2843 Bingang Xu author Lijie Ci author Andreu Cabot author Qing Sun author MaIb department The SiOx anode exhibits a high specific capacity and commendable durability for lithium-ion batteries (LIBs). However, its practical application is hindered by significant volumetric fluctuations during lithiation/delithiation, alongside a metastable nature, which induces mechanical instability and irreversible lithium consumption, ultimately impairing long-term capacity retention in full-battery cell configurations. In this study, we present a phase-engineering approach designed to improve the structural stability of SiOx anodes for LIB applications. By incorporating lithium fluoride, amorphous SiOx undergoes partial transformation into a quartz-like phase, which enhances mechanical integrity and mitigates irreversible lithium loss. This modified anode demonstrates significantly improved stability and prolonged cycle lifespan. Through a combination of multiscale simulations and in situ characterizations, we elucidate the stabilization mechanisms conferred by the quartz phase, providing critical insights into the role of SiOx’s crystal structure in influencing degradation pathways. This work introduces an accessible and efficient method for controlling the crystallinity of SiOx, offering a practical solution to enhance the durability of high-energy-density LIBs. American Chemical Society2025 eng 1936-0851 1936-086X 40237414 00146860670000110.1021/acsnano.5c03074 191616096-16109 Li J, Zeng G, Horta S, Martínez-Alanis PR, Jacas Biendicho J, Ibáñez M, Xu B, Ci L, Cabot A, Sun Q. 2025. Crystallographic engineering in micron-sized SiOx anode material toward stable high-energy-density Lithium-Ion batteries. ACS Nano. 19(16), 16096–16109. Li J, Zeng G, Horta S, et al. Crystallographic engineering in micron-sized SiOx anode material toward stable high-energy-density Lithium-Ion batteries. <i>ACS Nano</i>. 2025;19(16):16096-16109. doi:<a href="https://doi.org/10.1021/acsnano.5c03074">10.1021/acsnano.5c03074</a> J. Li, G. Zeng, S. Horta, P.R. Martínez-Alanis, J. Jacas Biendicho, M. Ibáñez, B. Xu, L. Ci, A. Cabot, Q. Sun, ACS Nano 19 (2025) 16096–16109. J. Li <i>et al.</i>, “Crystallographic engineering in micron-sized SiOx anode material toward stable high-energy-density Lithium-Ion batteries,” <i>ACS Nano</i>, vol. 19, no. 16. American Chemical Society, pp. 16096–16109, 2025. Li, Jing, et al. “Crystallographic Engineering in Micron-Sized SiOx Anode Material toward Stable High-Energy-Density Lithium-Ion Batteries.” <i>ACS Nano</i>, vol. 19, no. 16, American Chemical Society, 2025, pp. 16096–109, doi:<a href="https://doi.org/10.1021/acsnano.5c03074">10.1021/acsnano.5c03074</a>. Li, Jing, Guifang Zeng, Sharona Horta, Paulina R. Martínez-Alanis, Jordi Jacas Biendicho, Maria Ibáñez, Bingang Xu, Lijie Ci, Andreu Cabot, and Qing Sun. “Crystallographic Engineering in Micron-Sized SiOx Anode Material toward Stable High-Energy-Density Lithium-Ion Batteries.” <i>ACS Nano</i>. American Chemical Society, 2025. <a href="https://doi.org/10.1021/acsnano.5c03074">https://doi.org/10.1021/acsnano.5c03074</a>. Li, J., Zeng, G., Horta, S., Martínez-Alanis, P. R., Jacas Biendicho, J., Ibáñez, M., … Sun, Q. (2025). Crystallographic engineering in micron-sized SiOx anode material toward stable high-energy-density Lithium-Ion batteries. <i>ACS Nano</i>. American Chemical Society. <a href="https://doi.org/10.1021/acsnano.5c03074">https://doi.org/10.1021/acsnano.5c03074</a> 196292025-04-27T22:02:14Z2025-09-30T12:19:51Z