The Influence of the Coordination on the Kinetic Behavior of the Anion Intercalation/De-Intercalation into the Graphite Electrode

Abstract

The effect of Li-salt concentration on the anion intercalation/de-intercalation reaction is studied. In LiN(CF3SO2)2 –or LiClO4/propylene carbonate cases, the interfacial activation energy for (E a) does not show the concentration dependency in the case of dilute solutions, while higher E a is obtained in the concentrated solutions. The result means that the activation barrier changes from the electrode side to the solution side by increasing the salt concentration. In addition, E a for the concentrated solutions continuously increase with the Li-salt concentration, although the activation barrier by the cleavage of the ion pair should be independent from the salt concentration. From the results, it is concluded that the charge of anion will not be shielded enough and the interaction from the wide range will influence the activation barrier.