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As potential alternatives to graphite, silicon (Si) and silicon oxides (SiOx) received a lot of attention as anode materials for lithium-ion batteries owing to their relatively low working potentials, high theoretical specific capacities, and abundant resources. However, the commercialization of Si-based anodes is greatly hindered by their massive volume expansion, low conductivity, unstable solid electrolyte interface (SEI), and low initial Coulombic efficiency (ICE). Continuous endeavors have been devoted to overcoming these challenges to achieve practical usage. This review is centered on the major challenges and latest developments in the modification strategies of Si-based anodes, including structure optimization, surface/interface regulation, novel binders, and innovative design of electrolyte. Finally, outlooks and perspectives of Si-based anodes for future development are presented.

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Publication history

Received: 11 July 2022
Revised: 23 September 2022
Accepted: 06 October 2022
Published: 21 November 2022

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© Tsinghua University Press 2022

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 52122209, 52111530050, and 51772147), Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. SJCX22_0433), and the Research Foundation of State Key Lab (Nos. ZK201906 and ZK201805).

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Email: nanores@tup.tsinghua.edu.cn

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