Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 161, Issue 14, Pages A2080-A2086Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0311414jes
Keywords
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Funding
- Advanced Energy Storage Research Programme, Institute of Materials Research and Engineering (IMRE) of the Agency for Science, Technology and Research (A*STAR), Singapore [IMRE/12-2P0503, IMRE/12-2P0504]
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Near-neutral electrolytes based on zinc chloride and ammonium chloride are examined for rechargeable zinc-air battery application. The effects of pH value, salt concentration, and polyethylene glycol and thiourea additives are investigated and a chloride electrolyte is developed. The reversible zinc deposition and zinc stripping processes are studied by cyclic voltammetry with rotating-disc electrode technique. The zinc anode and air cathode behaviors in near-neutral chloride electrolyte are characterized by quasi steady-state polarization and impedance spectroscopy. Prototyped zinc-air battery with near-neutral chloride electrolytes can sustain more than 1000 hours and hundreds of discharge-charge cycles with minimized zinc dendrite formation and no carbonate formation problem, under discharge-charge capacity ranging from 20 to 120 mAh. The near-neutral chloride electrolyte provides a safer and more robust alternative to traditional alkaline electrolyte for rechargeable zinc-air batteries. (C) The Author(s) 2014. Published by ECS. All rights reserved.
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