Zinc morphology in zinc–nickel flow assisted batteries and impact on performance

The zinc morphology on repeated charging and discharging in flow-assisted zinc–nickel oxide cells was studied. The results show that higher charge rates cause more dendritic growth of zinc deposition on charging and tend to cause deterioration of battery cells. However, when the electrolyte velocity...

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Bibliographic Details
Published in:Journal of power sources 2011-02, Vol.196 (4), p.2340-2345
Main Authors: Ito, Yasumasa, Nyce, Michael, Plivelich, Robert, Klein, Martin, Steingart, Daniel, Banerjee, Sanjoy
Format: Article
Language:English
Subjects:
Batteries
Charge
Charging
Coulombic efficiency
Discharge
Distortion
Electric batteries
Electrolytic cells
Energy efficiency
Flow battery
Morphology
Zinc
Zinc morphology
Zinc–nickel oxide battery
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Summary:The zinc morphology on repeated charging and discharging in flow-assisted zinc–nickel oxide cells was studied. The results show that higher charge rates cause more dendritic growth of zinc deposition on charging and tend to cause deterioration of battery cells. However, when the electrolyte velocity is higher than 15 cm s −1, the direction of dendrites was distorted toward the flow direction and the internal short circuit was suppressed. Good cycle life was obtained – 1500 cycles at 100% depth of discharge and C/2 charge and discharge rate. Also, the battery was scaled up to a 100 Wh prismatic cell, and more than 200 cycles were obtained.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2010.09.065