Journal
ELECTROCHIMICA ACTA
Volume 51, Issue 25, Pages 5334-5340Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2006.02.004
Keywords
lithium-polymer battery; lithium dendrite; thermo-fusible effect; impedance spectroscopy; in situ microscopy
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We report on experimental and theoretical studies of dendritic growth in Li/polymer/Li symmetric cells. Potential evolution with time, impedance and in situ microscopy experiments enable to characterise the onset and evolution of dendrites. In particular we observe that dendrites may burn when a high enough current goes through them, a thermo-fusible effect predicted in a previous paper and confirmed by SEM experiments. We present a calculation that gives a quantitative description of this effect: our results enable to understand a series of experimental data published in the literature concerning impedance variations observed while cycling lithium-polymer cells. (c) 2006 Elsevier Ltd. All rights reserved.
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