Lithiophilic Sn-Co nano-seeds sealed in a hollow carbon shell to stabilize lithium metal anodes

A lithiophilic Sn-Co nano-seed sealed in a nitrogen-doped carbon shell is designed to stabilize lithium metal anodes, in which lithiophilic alloys can regulate lithium deposition behavior and the hollow carbon shell is beneficial to prevent agglomeration. The modified lithium anode can be stable for...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2022-08, Vol.58 (66), p.9194-9197
Main Authors: Li, Qiuping, Zhang, Jiaming, Zeng, Yaping, Tang, Zheng, Sun, Dan, Peng, Zhiguang, Tang, Yougen, Li, Huanhuan, Wang, Haiyan
Format: Article
Language:English
Subjects:
Anodes
Carbon
Lithium
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Summary:A lithiophilic Sn-Co nano-seed sealed in a nitrogen-doped carbon shell is designed to stabilize lithium metal anodes, in which lithiophilic alloys can regulate lithium deposition behavior and the hollow carbon shell is beneficial to prevent agglomeration. The modified lithium anode can be stable for 1350 h and 400 h under 1 mA cm −2 and 5 mA cm −2 in symmetric cells. The Sn-Co@C@Li||LiFePO 4 full cell with a low N/P ratio of 2.12 shows a superior capacity retention of >98% over 250 cycles under 1C. A yolk-shell nanostructure with lithiophilic Sn-Co nano-seeds and a N-doped carbon shell is proposed to stabilize lithium nucleation and deposition.
ISSN:1359-7345
1364-548X
DOI:10.1039/d2cc02932d