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Engineering High Reversibility and Fast Kinetics of Bi Nanoflakes by Surface Modulation for Ultrastable Nickel-Bismuth Batteries

Abstract

The exploration of 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 promising anode material, but it suffers from the poor stability. Here, we successfully endow Bi nanoflakes (NFs) with prominent cycling performance by one-step surface oxidation approach to remarkably boost its reversibility and reaction kinetics. As a result, the partially oxidized Bi NFs (BiOx) show 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 20000 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.

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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, Accepted Manuscript
  • 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, Accepted Manuscript , DOI: 10.1039/C8SC04967J

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