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Updated: Dec 29, 2025
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Published on: November 11, 2013
N-Doped carbon coated bismuth nanorods with a hollow structure as an anode for superior-performance potassium-ion
Hang Li1, Chunxia Zhao1, Yameng Yin1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, 430070, Wuhan, P. R. China. zelangjian@whut.edu.cn.
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 g-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.
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