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N-Doped carbon coated bismuth nanorods with a hollow structure as an anode for superior-performance potassium-ion batteries

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Abstract

Bismuth (Bi) is a promising anode material for potassium-ion batteries due to its high energy density. However, the large volume change limits its applications. Herein, N-doped carbon coated Bi nanorods with a hollow structure are fabricated and they exhibit excellent long-term cycling performance (88% capacity retention over 1000 cycles) and high-rate ability (297 mA h gāˆ’1 at 20C, 94% capacity of that at 1C). Furthermore, the mechanism was expounded by in situ XRD, indicating a multi-phase reaction for the initial discharge process and three two-phase reactions for the subsequent charge/discharge processes.

Graphical abstract: N-Doped carbon coated bismuth nanorods with a hollow structure as an anode for superior-performance potassium-ion batteries

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Article information


Submitted
20 Nov 2019
Accepted
11 Jan 2020
First published
13 Jan 2020

Nanoscale, 2020, Advance Article
Article type
Communication

N-Doped carbon coated bismuth nanorods with a hollow structure as an anode for superior-performance potassium-ion batteries

H. Li, C. Zhao, Y. Yin, Y. Zou, Y. Xia, Q. An, Z. Jian and W. Chen, Nanoscale, 2020, Advance Article , DOI: 10.1039/C9NR09867D

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