Yolk-Shell-Structured Bismuth@N-Doped Carbon Anode for Lithium-Ion Battery with High Volumetric Capacity

ACS Applied Materials & Interfaces
Wanwan HongXiaobo Ji

Abstract

As an anode for lithium-ion batteries, metallic bismuth (Bi) can provide a superb volumetric capacity of 3800 mA h cm-3, showing perspective value for application. It is a pity that the severe volume swelling during the lithiation process leads to the dramatic deterioration of the cycling performances. To overcome this issue, Bi nanorods encapsulated in N-doped carbon nanotubes (yolk-shell Bi@C-N) are elaborately designed through in situ thermal reduction of Bi2S3@polypyrrole nanorods. In comparison with the commercial Bi, the lithium storage capacities of Bi@C-N are significantly enhanced, and it presents a stable volumetric capacity of 1700 mA h cm-3 over 500 cycles at a high current density of 1.0 A g-1, nearly 2.2 times that of graphite. The N-doped carbon nanotube and the cavity between the carbon wall and Bi jointly contribute to this superior performance. Especially, the failure mechanism of Bi nanorods and the protective effect of the carbon shell are revealed by ex situ TEM, which illuminates the decreasing tendency in the initial 10-20 cycles and the subsequent stable trend of cyclic performance.

References

May 8, 2003·Journal of the American Chemical Society·Kyu T LeeSeung M Oh
Dec 3, 2010·Nature Chemistry·Ram Mohan
Feb 6, 2013·Organic & Biomolecular Chemistry·Thierry Ollevier
Jul 19, 2014·Science·Muhammet UyanikKazuaki Ishihara
Sep 4, 2015·Journal of Nanoscience and Nanotechnology·Xin HuXiaocai Liang

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Citations

Jun 25, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Siying WenJingli Xu
Mar 29, 2020·Journal of Molecular Modeling·Kaimin FanQingqiang Sun
May 30, 2019·ACS Applied Materials & Interfaces·Sailan SuBingan Lu
Nov 18, 2020·ACS Applied Materials & Interfaces·Y X RenT S Zhao

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