Concentration measurements in lithium/polymer-electrolyte/lithium cells during cycling

摘要

We report on in situ and ex situ concentration measurements in lithium/polymer-electrolyte/lithium cells during cycling. We have used three different methods which give complementary results, in good agreement with theoretical prediction s and previous concentration measurements by Raman confocal microspectroscopy. Our methods allow to obtain concentration maps in the electrolyte, in particular, when dendrites are observed: from these measurements, we can correlate the onset of dendritic growth with local concentration gradients.