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We report on three different in situ and ex situ concentration measurement methods in symmetric lithium/polymer‐electrolyte/lithium cells. We examine our results on the basis of a simple calculation of ionic concentration within the electrolyte; in the case where no dendrite is observed, this calculation accounts quantitatively for all experimental results. In the case of dendritic growth, we can measure the concentration distribution around the dendrites; this permits correlation of the active parts of the electrodes and of the growing dendrites with local ionic depletion in the vicinity of these active parts. © 1999 The Electrochemical Society. All rights reserved.
Brissot et al. (Wed,) studied this question.