Morphology Control of Electrodeposited Zinc from Alkaline Zincate Solutions for Rechargeable Zinc Air Batteries

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Proceedings titleECS Transactions
Conference217th ECS Meeting: Metal/Air and Metal/Water Batteries, Vancouver, B.C., Canada, April 25-30, 2010
Pages3544; # of pages: 10
SubjectAnomalous electrocrystallization; Zn battery; deposit morphology
AbstractAnomalous electrocrystallization of Zn in alkaline electrolytes is one of the hurdles hindering the development and Commercialization of secondary alkaline Zn batteries. The issue stems from the fast electrochemical kinetics of Zn in alkaline electrolytes. Pulse deposition enables the use of high peak current densities and overpotentials, increases the nucleation rate and improves the deposit morphology. The cathodic behavior of Zn and effect of pulse parameters including duty cycle and frequency on the deposit morphology were studied for electrolytes containing 4, 6 and 9 M KOH. It was shown that in order to attain fine-grain, smooth deposits by pulse deposition, application of small duty cycles and high frequencies are essential. Pulse deposition, however, does not improve the morphology in case highly concentrated KOH electrolytes are used.
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AffiliationNRC Institute for Fuel Cell Innovation; National Research Council Canada
Peer reviewedYes
NPARC number16910710
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Record identifier1a4d8817-df47-4c88-9f4a-78f0b70271b0
Record created2011-02-25
Record modified2016-05-09
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