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

Qiuping Li; Jiaming Zhang; Yaping Zeng; Zheng Tang; Dan Sun; Zhiguang Peng; Yougen Tang; Huanhuan Li; Haiyan Wang

doi:10.1039/d2cc02932d

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

Chem Commun (Camb). 2022 Aug 16;58(66):9194-9197. doi: 10.1039/d2cc02932d.

Authors

Qiuping Li¹, Jiaming Zhang¹, Yaping Zeng¹, Zheng Tang¹, Dan Sun¹, Zhiguang Peng¹, Yougen Tang^{1

2}, Huanhuan Li³, Haiyan Wang^{1

2}

Affiliations

¹ Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China. wanghy419@csu.edu.cn.
² Shenzhen Research Institute of Central South University, Shenzhen, 518057, P. R. China.
³ School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, P. R. China.

PMID: 35894590
DOI: 10.1039/d2cc02932d

Abstract

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||LiFePO₄ full cell with a low N/P ratio of 2.12 shows a superior capacity retention of >98% over 250 cycles under 1C.