Dependence of reversible capacity in the lithium rechargeable batteries on the crystal structure of the carbon electrode

Summary form only given. We report the results of dependence of the capacities in the lithium rechargeable batteries on the crystal structure of the carbon electrode. It was found that when the crystal size (Lc) of the carbon electrode is increased, both reversible and irreversible capacities are decreased in the first cycle. Further, the irreversible capacity is not only dependent on the crystal size, but also on the electrolyte decomposition reaction, and the reactions between lithium and functional groups in the carbon electrode in all range of applied potentials. It has been suggested that there are two kinds of Li ions in the carbon electrode, namely, Li ion located on the edge and the surface of the crystal layers in the carbon electrode, and Li ion located between the crystal layers. The relationship between the reversible capacity and the crystal size will be explained. New model will be presented.