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Nanomaterials 2015, 5(4), 1756-1765;

Direct Growth of Bismuth Film as Anode for Aqueous Rechargeable Batteries in LiOH, NaOH and KOH Electrolytes

3,* and 1,2,*
School of Chemistry, Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
Institute of Nanoscience and Nanotechnology, Department of Physics, Central China Normal University, Wuhan 430079, China
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
These authors contributed equally to this work.
Authors to whom correspondence should be addressed.
Academic Editor: Andy (Xueliang) Sun
Received: 19 September 2015 / Revised: 3 October 2015 / Accepted: 16 October 2015 / Published: 22 October 2015
(This article belongs to the Special Issue Nanostructured Materials for Li-Ion Batteries and Beyond)
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As promising candidates for next-generation energy storage devices, aqueous rechargeable batteries are safer and cheaper than organic Li ion batteries. But due to the narrow voltage window of aqueous electrolytes, proper anode materials with low redox potential and high capacity are quite rare. In this work, bismuth electrode film was directly grown by a facile hydrothermal route and tested in LiOH, NaOH and KOH electrolytes. With low redox potential (reduction/oxidation potentials at ca. −0.85/−0.52 V vs. SCE, respectively) and high specific capacity (170 mAh·g−1 at current density of 0.5 A·g−1 in KOH electrolyte), Bi was demonstrated as a suitable anode material for aqueous batteries. Furthermore, by electrochemical impedance spectroscopy (EIS) analysis, we found that with smaller Rs and faster ion diffusion coefficient, Bi electrode film in KOH electrolyte exhibited better electrochemical performance than in LiOH and NaOH electrolytes. View Full-Text
Keywords: aqueous rechargeable batteries; Bi; anode; EIS; ion diffusion coefficient aqueous rechargeable batteries; Bi; anode; EIS; ion diffusion coefficient

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zuo, W.; Xu, P.; Li, Y.; Liu, J. Direct Growth of Bismuth Film as Anode for Aqueous Rechargeable Batteries in LiOH, NaOH and KOH Electrolytes. Nanomaterials 2015, 5, 1756-1765.

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