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


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


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1

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

2

Institute of Nanoscience and Nanotechnology, Department of Physics, Central China Normal University, Wuhan 430079, China

3

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

Abstract 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





Autor: Wenhua Zuo 1,2,†, Pan Xu 1,2,†, Yuanyuan Li 3,* and Jinping Liu 1,2,*

Fuente: http://mdpi.com/



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