Electrochemical stability of copper in lithium-ion battery electrolytes

The electrochemical stability of copper substrate was studied in three diff erent lithium-ion battery electrolytes. Cyclic voltammetry was used to stud y the oxidation-reduction behavior of copper in these electrolyte solutions . The reduction of electrolyte and its effect on the oxidation of copper wa s also studied. Bulk electrolysis was used to quantitatively study the diss olution of copper in dry electrolytes and in electrolytes doped with impuri ties of H2O or HE The stability of copper was closely related to the compos ition of the electrolytes. Impurities dramatically increased the oxidation tendency of copper. (C) 2000 The Electrochemical Society. S0013-4651(00)03- 057-3. All rights reserved.