TY - JOUR
T1 - Tuning the stable interlayer structure of SiOx-based anode materials for high-performance lithium-ion batteries
AU - Zou, Junhui
AU - Huang, Ying
AU - Xie, Yangyang
AU - Du, Xianping
AU - Chen, Chen
AU - Zhou, Jianghong
AU - Bi, Zhao
AU - Xuan, Xiaodie
AU - Guo, Yuchen
AU - Tang, Yi
AU - Zhang, Aibo
AU - Yang, Chenhui
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.
PY - 2025/5
Y1 - 2025/5
N2 - The significant volume expansion effect and unstable solid electrolyte interphase (SEI) film of SiOx-based anode materials hinder their commercial development. Research has indicated that composite coating is a common strategy to address these crucial issues. This paper reports the preparation of SiOx@TiO2@C nanospheres with a unique interlayer structure using a sol–gel method combined with etching. In the preparation process, SiOx nanospheres serve as the core, and the morphology and electrochemical performance of SiOx@TiO2@C are influenced by NaOH etching for different durations. With increasing etching time, SiOx@TiO2@C nanospheres with a suitable interlayer structure and sufficient gaps were obtained. This distinctive interlayer structure can mitigate the volume expansion of SiOx, enhance the structural stability of the electrode material during repeated Li+ insertion/deinsertion processes, and improve cycling stability. When used as an anode material for lithium-ion batteries, the SiOx@TiO2@C with the best clearance exhibits a reversible capacity of 310.0 mAh g-1 (600 cycles at 2.0 A g-1), a high initial Coulombic efficiency (87%), and excellent cycling performance. This work paves the way for the development of SiOx-based anode materials for high-performance lithium-ion batteries.
AB - The significant volume expansion effect and unstable solid electrolyte interphase (SEI) film of SiOx-based anode materials hinder their commercial development. Research has indicated that composite coating is a common strategy to address these crucial issues. This paper reports the preparation of SiOx@TiO2@C nanospheres with a unique interlayer structure using a sol–gel method combined with etching. In the preparation process, SiOx nanospheres serve as the core, and the morphology and electrochemical performance of SiOx@TiO2@C are influenced by NaOH etching for different durations. With increasing etching time, SiOx@TiO2@C nanospheres with a suitable interlayer structure and sufficient gaps were obtained. This distinctive interlayer structure can mitigate the volume expansion of SiOx, enhance the structural stability of the electrode material during repeated Li+ insertion/deinsertion processes, and improve cycling stability. When used as an anode material for lithium-ion batteries, the SiOx@TiO2@C with the best clearance exhibits a reversible capacity of 310.0 mAh g-1 (600 cycles at 2.0 A g-1), a high initial Coulombic efficiency (87%), and excellent cycling performance. This work paves the way for the development of SiOx-based anode materials for high-performance lithium-ion batteries.
UR - http://www.scopus.com/inward/record.url?scp=105005843304&partnerID=8YFLogxK
U2 - 10.1007/s10853-025-10711-1
DO - 10.1007/s10853-025-10711-1
M3 - 文章
AN - SCOPUS:105005843304
SN - 0022-2461
VL - 60
SP - 8449
EP - 8463
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 20
M1 - 142172
ER -