TY - JOUR
T1 - Electrodeposition of preferentially oriented zinc for flow-assisted alkaline batteries
AU - Desai, Divyaraj
AU - Wei, Xia
AU - Steingart, Daniel Artemus
AU - Banerjee, Sanjoy
N1 - Funding Information:
The support of the Department of Energy (ARPA-E grant no DE-AR0000150 ) and the National Science Foundation (NSF grant no 1031820 ) is gratefully acknowledged. The authors would like to express their gratitude to Dr. Damon E. Turney, Dr. Joshua W. Gallaway, Dr. Jorge Morales and Dr. Alexey Bykov, all from City College of New York, for their assistance in preparing this manuscript. The authors would also like to thank Professor Yasumasa Ito, Nagoya University for his many helpful suggestions.
PY - 2014/6/15
Y1 - 2014/6/15
N2 - Preferred orientation of zinc deposits during charging is shown to significantly improve performance and cycle life in flow-assisted alkaline zinc batteries, which has not been demonstrated earlier. The preferred orientation of zinc deposits was investigated using X-ray diffraction (XRD). Compact zinc is found to have (112̄2) preferred orientation on brass, which contributes to ∼60% of the texture. The effect of charging current and zincate concentration on morphology was investigated in a rotating hull cell and correlated with anodic efficiency. Compact zinc deposits are found to have a fine-grained, bright finish and the highest anodic efficiency. Electrochemical impedance spectroscopy (EIS) proves that compact zinc corresponds to the minimum in the half-cell resistance. Morphological control using compact zinc could be accomplished using innovations such as pulse charging or enhanced mass-transfer to improve anode performance without affecting the cathode.
AB - Preferred orientation of zinc deposits during charging is shown to significantly improve performance and cycle life in flow-assisted alkaline zinc batteries, which has not been demonstrated earlier. The preferred orientation of zinc deposits was investigated using X-ray diffraction (XRD). Compact zinc is found to have (112̄2) preferred orientation on brass, which contributes to ∼60% of the texture. The effect of charging current and zincate concentration on morphology was investigated in a rotating hull cell and correlated with anodic efficiency. Compact zinc deposits are found to have a fine-grained, bright finish and the highest anodic efficiency. Electrochemical impedance spectroscopy (EIS) proves that compact zinc corresponds to the minimum in the half-cell resistance. Morphological control using compact zinc could be accomplished using innovations such as pulse charging or enhanced mass-transfer to improve anode performance without affecting the cathode.
KW - Flow battery
KW - Impedance spectroscopy (EIS)
KW - Preferred orientation
KW - X-ray diffraction (XRD)
KW - Zinc morphology
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U2 - 10.1016/j.jpowsour.2014.01.026
DO - 10.1016/j.jpowsour.2014.01.026
M3 - Article
AN - SCOPUS:84893593384
SN - 0378-7753
VL - 256
SP - 145
EP - 152
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -