Complete Prevention of Dendrite Formation in Zn Metal Anodes by Means of Pulsed Charging Protocols

ACS Applied Materials & Interfaces
Grecia GarciaWolfgang Schuhmann

Abstract

Zn metal as anode in rechargeable batteries, such as Zn/air or Zn/Ni, suffers from poor cyclability. The formation of Zn dendrites upon cycling is the key limiting step. We report a systematic study of the influence of pulsed electroplating protocols on the formation of Zn dendrites and in turn on strategies to completely prevent Zn dendrite formation. Because of the large number of variables in electroplating protocols, a scanning droplet cell technique was adapted as a high-throughput methodology in which a descriptor of the surface roughness can be in situ derived by means of electrochemical impedance spectroscopy. Upon optimizing the electroplating protocol by controlling nucleation, zincate ion depletion, and zincate ion diffusion, scanning electron microscopy and atomic force microscopy confirmed the growth of uniform and homogenous Zn deposits with a complete prevention of dendrite growth. The implementation of pulsed electroplating as the charging protocol for commercially available Ni-Zn batteries leads to substantially prolonged cyclability demonstrating the benefits of pulsed charging in Zn metal-based batteries.

References

Feb 8, 2008·Nature·M Armand, J-M Tarascon
Aug 21, 2013·Chemical Society Reviews·Hansu KimHun-Joon Sohn
Jun 14, 2014·Chemical Society Reviews·Yanguang Li, Hongjie Dai
Jul 1, 2016·Advanced Materials·Giuseppe Antonio EliaRobert Hahn

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Citations

Nov 28, 2018·ChemSusChem·William ManalastasMadhavi Srinivasan
Dec 12, 2018·Advanced Materials·Jing FuZhongwei Chen
Jun 27, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·David Muñoz-TorreroEdgar Ventosa
Aug 15, 2020·Frontiers in Chemistry·Leibin GuoYuanhui Cheng
Oct 7, 2020·Science Robotics·Mingqiang WangNicholas A Kotov
Oct 27, 2020·Advanced Materials·Qi YangChunyi Zhi
Jan 31, 2019·ACS Applied Materials & Interfaces·Kyle S NagyDonald J Siegel
Jan 14, 2021·The Journal of Physical Chemistry Letters·Ming LiRuth Knibbe

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