Gel polyelectrolytes based on lithium carboxylates

The passivation phenomena at the lithium-gel polyelectrolyte interface were examined by means of the impedance spectroscopy and the de polarization of cells. Polymeric lithium salts with immobilized carboxylic anions, plastic ized with dimethoxyethylenesulfoxide, were used as the electrolyte. It was found that passivation layers could be formed in these systems both on the surface of the electrode and the polymeric membrane. The generation of mobi le anions and decrease of the lithium transference number accompany the pas sivation. The passivation undergoes strong inhibition in the presence of BF 3. (C) 1999 Published by Elsevier Science BN. All rights reserved.