A Near-Neutral Chloride Electrolyte for Electrically Rechargeable Zinc-Air Batteries

By F. W. Thomas Goh, Zhaolin Liu, T. S. A. Hor, Jie Zhang, Xiaoming Ge, Y. Zong, A. Yu, W. Khoo. 2014

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Near-neutral electrolytes based on zinc chloride and ammonium chloride are examined for rechargeable zinc-air battery application.TheeffectsofpHvalue,saltconcentration,andpolyethyleneglycolandthioureaadditivesareinvestigatedandachlorideelectrolyteisdeveloped.Thereversiblezincdepositionandzincstrippingprocessesarestudiedbycyclicvoltammetrywithrotating-discelectrodetechnique. The zinc anode and air cathode behaviors in near-neutral chloride electrolyte are characterized by quasi steady-statepolarization and impedance spectroscopy. Prototyped zinc-air battery with near-neutral chloride electrolytes can sustain more than1000 hours and hundreds of discharge-charge cycles with minimized zinc dendrite formation and no carbonate formation problem,underdischarge-chargecapacityrangingfrom20to120mAh.Thenear-neutralchlorideelectrolyteprovidesasaferandmorerobustalternative to traditional alkaline electrolyte for rechargeable zinc-air batteries.© The Author(s) 2014. Published by ECS. This is an open access article distributed under the terms of the Creative CommonsAttribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in anymedium, provided the original work is properly cited. [DOI: 10.1149/2.0311414jes] All rights reserved.Manuscript submitted June 17, 2014; revised manuscript received August 27, 2014. Published October 1, 2014.

Subfields: Catalysis, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/e68bc48e7e691a330e7fae00a8de1dbe73bccacb

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