Journal
ELECTROCHIMICA ACTA
Volume 100, Issue -, Pages 333-341Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.12.131
Keywords
Li metal; Ionic liquid; Dendrite growth process
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The electrodeposition process of Li metal in 1.0 M LiTFSI-ionic liquid (N-methoxymethyl-N-methylpyrrolidinium) bis(trifluoromethane-sulfonyl) imide was observed in situ by optical microscope. Morphological variations of electrodeposited Li dendrite and its growth rate were examined and the ionic mass transfer rate in the vicinity of the electrode surface was discussed. Once the dendrite starts to grow, its length is proportional to the square root of time. This indicates that the Li+ mass transfer rate affects its growth. Dendrite growth process can be classified into two regions depending on its growth rate: the initiation period and the growing period with swinging behavior probably caused by residual stress. (c) 2013 Elsevier Ltd. All rights reserved.
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