Metallic Sb-stabilized porous silicon with stable SEI and high electron/ion conductivity boosting lithium-ion storage performance

Jia-Guo Deng ¹Hao-Qin Feng ¹Yu-Long Xu ¹Si-Guang Guo ¹Jian-Ping Li ¹Kai-Fu Huo ²Ji-Jiang Fu ¹Biao Gao ¹Pual-K.Chu³

扫码查看

作者信息

1. The State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology,Wuhan University of Science and Technology,Wuhan 430081,China
2. Wuhan National Laboratory for Optoelectronics(WNLO),School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China
3. Department of Physics,Department of Materials Science &Engineering,and Department of Biomedical Engineering,City University of Hong Kong,Hong Kong 999077,China
折叠

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 conductiv-ity 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 liga-ments 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.

Key words

Silicon/Anodes/Lithium-ion batteries/Antimony/Solid electrolyte interphase

引用本文复制引用

基金项目

National Natural Science Foundation of China(51974208)

National Natural Science Foundation of China(U2003130)

National Natural Science Foundation of China(52002297)

National Natural Science Foundation of China(U2004120)

Basic Research Program of Shenzhen Municipal Science and Technology Innovation Committee(JCYJ20210324141613032)

Outstanding Youth Foundation of Natural Science Foundation of Natural Science Foundation of Hubei Province(2020CFA099)

Innovation Group of Key Research and Development Program of Hubei Province(2021BAA208)

Innovation Group of Key Research and Development Program of Hubei Province(2022BCA061)

Knowledge Innovation Project of Wuhan City(2022010801010303)

National Key R&D Program of China(2022YFB2404800)

Key R&D Projects of Hubei Province(2022BCA061)

Key R&D Projects of Hubei Province(2021 BAA 176)

City University of Hong Kong Strategic Research Grant(SRG)()

Hong Kong,China(7005505)

City University of Hong Kong Donation Research Grant(DON-RMG 9229021)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量3

段落导航