Metallic Sb-stabilized porous silicon with stable SEI and high electron/ion conductivity boosting lithium-ion storage performance
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Pages (from-to) | 4234-4242 |
Journal / Publication | Rare Metals |
Volume | 43 |
Issue number | 9 |
Online published | 24 May 2024 |
Publication status | Published - Sept 2024 |
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Abstract
Silicon (Si) has mild discharge potential and high theoretical capacity, making it a highly desirable material for lithium-ion batteries (LIBs). Nevertheless, the excessive volume expansion, poor ion/electron conductivity and unstable solid electrolyte interface (SEI) hinder practical application to LIBs. Herein, the metallic antimony (Sb) stabilized porous Si (Si–Sb) composite was prepared by magnesiothermic reduction of Sb2O3 and Mg2Si and chemical etching to remove the by-product of MgO. The highly conductive Sb nanodots embedded in the Si ligaments promote not only the formation of conductive and stable LiF-rich SEI, but also the electron/ion transport ability of Si. Owing to the outstanding bulk/interface stability, excellent conductivity, as well as ideal porous structure, the Si–Sb electrode demonstrates a capacity of 820 mAh·g−1 after undergoing 320 turns at 1000 mA·g−1. Additionally, it exhibits a stable capacity of 675 mAh·g−1 when tested at a higher current density of 5000 mA·g−1. The results reveal a viable solution to solve three problems at the same time, namely the poor conductivity, inferior SEI and excessive volume expansion of Si, boding well for the design of Si-based materials for high-energy LIBs. Graphical abstract: (Figure presented.) © Youke Publishing Co., Ltd 2024.
Research Area(s)
- Anodes, Antimony, Lithium-ion batteries, Silicon, Solid electrolyte interphase
Citation Format(s)
Metallic Sb-stabilized porous silicon with stable SEI and high electron/ion conductivity boosting lithium-ion storage performance. / Deng, Jia-Guo; Feng, Hao-Qin; Xu, Yu-Long et al.
In: Rare Metals, Vol. 43, No. 9, 09.2024, p. 4234-4242.
In: Rare Metals, Vol. 43, No. 9, 09.2024, p. 4234-4242.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review