Electrochemical Studies of Lithium Intercalation into Graphite Film Electrode for Li⁺-ion Batteries

To study the electrochemical kinetic properties of the Li/Graphite system, cycle voltammerty (CV), ac-impedance and chronoamperometry (CA) techniques have been used. The results showed that the diffusion of lithium ions in Li_xC₆ is the rate-determining step. The chemical diffusion coefficients of lithium (D_Li) have been estimated for different x values. As for the same material, the value of D_Li was calculated in order to compare the differences among the three techniques.