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Surficial structure regulation of SiOx material by high-energy ball milling and wet-alkali chemical reaction for lithium-ion batteries.

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Bibliographic Details
Title:	Surficial structure regulation of SiOx material by high-energy ball milling and wet-alkali chemical reaction for lithium-ion batteries.
Authors:	Mu, Xue¹ (AUTHOR), Fu, Chuankai¹ (AUTHOR), Mu, Tiansheng¹ (AUTHOR), Li, Renlong¹ (AUTHOR), Gao, Yunzhi¹ (AUTHOR), Du, Chunyu¹ (AUTHOR), Yin, Geping¹ (AUTHOR), Zuo, Pengjian¹ (AUTHOR) zuopj@hit.edu.cn
Source:	Journal of Power Sources. Nov2023, Vol. 584, pN.PAG-N.PAG. 1p.
Subjects:	Lithium-ion batteries, Ball mills, Chemical milling, Chemical reactions, Amorphous silicon, Surface recombination, Surface chemistry, Electric batteries
Abstract:	The inhomogeneous nature of SiO x anode material on the atomic scale directly affects its electrochemical performance. A large irreversible capacity loss at the first cycle severely hinders the applications of SiO x materials in lithium ion batteries. The modification of SiO x by means of high-energy ball-milling and wet alkali chemical reaction can tune the ordering of amorphous silicon and silicon dioxide in SiO x materials, which is beneficial to the activation of nano silicon region and the surficial composition optimization of the lithiated products of SiO x during the first discharge process, and the formed Li 2 SiO 3 phase and the increased O/Si ratio in the surface of SiO x contribute to the improved cyclic performance. This surface regulation approach is quite simple, efficient and suitable for large-scale applications of high-performance SiO x anode material. [Display omitted] • The SiO x was modified via high-energy ball milling and wet-alkali chemical reaction. • The Li + ions as network modifier contributes the surface structural recombination of SiO x. • The changes in SiO x surface chemistry optimize the lithiated products of SiO x. • The increased O/Si ratio of SiO x improves the cycling performance. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	The inhomogeneous nature of SiO x anode material on the atomic scale directly affects its electrochemical performance. A large irreversible capacity loss at the first cycle severely hinders the applications of SiO x materials in lithium ion batteries. The modification of SiO x by means of high-energy ball-milling and wet alkali chemical reaction can tune the ordering of amorphous silicon and silicon dioxide in SiO x materials, which is beneficial to the activation of nano silicon region and the surficial composition optimization of the lithiated products of SiO x during the first discharge process, and the formed Li 2 SiO 3 phase and the increased O/Si ratio in the surface of SiO x contribute to the improved cyclic performance. This surface regulation approach is quite simple, efficient and suitable for large-scale applications of high-performance SiO x anode material. [Display omitted] • The SiO x was modified via high-energy ball milling and wet-alkali chemical reaction. • The Li + ions as network modifier contributes the surface structural recombination of SiO x. • The changes in SiO x surface chemistry optimize the lithiated products of SiO x. • The increased O/Si ratio of SiO x improves the cycling performance. [ABSTRACT FROM AUTHOR]
ISSN:	03787753
DOI:	10.1016/j.jpowsour.2023.233608