Combined Method for Reducing Irreversible Capacity of the Negative Graphite Electrode in Lithium-Ion Battery

摘要

A method for the complete removal of the irreversible capacity of the negative electrode of lithiumion batteries is suggested. The method consists of bringing the graphite electrode in contact with metallic lithium in the electrolyte. The distinguishing feature of the modified method is that all operations (assembling and filling cells, storing electrodes) are performed in a carbon dioxide atmosphere. Performing all these operations in a carbon dioxide atmosphere improves the reproducibility of the method. The balance between the weight of lithium and graphite, which is optimum for the complete removal of the irreversible capacity, is calculated. It is shown that applying the combined method does not lead to a decrease in the reversible capacity of the negative electrode.