Faradaic adsorption of Li ore carbon. A novel concept for the capacity of the anode of the Li-ion secondary batteries

Use of Faradaic adsorption (FAd) of lithium on the carbon surface is a nove l concept proposed by us for providing an additional capacity for the carbo n anode of Li-ion secondary batteries. Since the capacity is, in general, p roportional to the effective specific surface area, implying that an active carbon having a very high specific surface area is expected to provide a v ery large adsorption capacity. Issues in the FAd process have been found in its poor reproducibility and cycleability. In the present paper, the condi tion to obtain a stable high current CV peak was examined in detail. We fou nd that cleaning the surface and maintaining a good electrical contact are the most important key factors, (C) 1999 Elsevier Science S.A. All rights r eserved.