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Issue 12, 2019
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Engineering high reversibility and fast kinetics of Bi nanoflakes by surface modulation for ultrastable nickel–bismuth batteries

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Abstract

The exploration of a stable and high-rate anode is of pivotal importance for achieving advanced aqueous rechargeable batteries. Owing to the beneficial properties of high conductivity, suitable negative working voltage, and three-electron redox, bismuth (Bi) is considered as a promising anode material, but it suffers from poor stability. Here, we successfully endow Bi nanoflakes (NFs) with prominent cycling performance by a one-step surface oxidation approach to remarkably boost its reversibility. As a result, the partially oxidized Bi NFs (BiOx) show an admirable capacity (0.38 mA h cm−2 at 2 mA cm−2), good rate capability and superior long-term stability (almost no capacity decay after 20 000 cycles). Furthermore, a durable aqueous Ni//Bi battery is constructed based on the optimized BiOx anode, which exhibits excellent durability with 96% capacity retention after 5000 cycles. This study could open a new avenue for the rational design of efficient anodes for eco-friendly and reliable aqueous rechargeable batteries.

Graphical abstract: Engineering high reversibility and fast kinetics of Bi nanoflakes by surface modulation for ultrastable nickel–bismuth batteries

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Publication details

The article was received on 07 Nov 2018, accepted on 11 Feb 2019 and first published on 11 Feb 2019


Article type: Edge Article
DOI: 10.1039/C8SC04967J
Citation: Chem. Sci., 2019,10, 3602-3607
  • Open access: Creative Commons BY-NC license
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    Engineering high reversibility and fast kinetics of Bi nanoflakes by surface modulation for ultrastable nickel–bismuth batteries

    Y. Zeng, M. Wang, W. He, P. Fang, M. Wu, Y. Tong, M. Chen and X. Lu, Chem. Sci., 2019, 10, 3602
    DOI: 10.1039/C8SC04967J

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