Abstract: The present invention relates to charging and discharging methods of a lithium ion battery with a high capacity retention rate, which comprise the following steps: (1) when a number of turns is n, the negative and positive electrodes of the lithium ion battery are only charged; after the charging is finished, a third electrode and a fourth electrode are discharged with controlled current, wherein the controlled current is 0.

Abstract: Disclosed are a lithium metal negative electrode, a preparation method therefor, and a lithium battery using the negative electrode. The preparation method for the lithium metal negative electrode is as follows: selecting a lithium salt and an organic solvent and mixing same to formulate an electrolyte, and uniformly mixing the electrolyte and a thickener at a ratio to obtain a viscous liquid A, then adding a lithium powder with a volume equivalent diameter of 1-30 ?m to the viscous liquid A at a ratio, stirring and mixing same until uniform to obtain a pasty lithium paste, and uniformly applying the lithium paste on a current collector to obtain the lithium metal negative electrode.

Abstract: A solid-liquid battery comprises a positive electrode and a negative electrode, the negative electrode is made of metal lithium, a solid electrolyte is provided between the positive electrode and the negative electrode, an ester electrolyte solution is filled between the solid electrolyte and the positive electrode, and an ether electrolyte solution is filled between the solid electrolyte and the negative electrode.

Abstract: The invention relates to a lithium ion battery with a high capacity retention rate, and a preparation method and charging and discharging methods thereof. The lithium ion battery comprises a positive electrode plate, a negative electrode plate, separators arranged between the positive electrode plate and the negative electrode plate at intervals, and an electrolyte, and further comprises a third electrode and a fourth electrode, which are independent of each other and provided between the positive electrode plate and the negative electrode plate, wherein the third electrode and the fourth electrode are separated by means of a single-layer separator, a metal lithium electrode being used as the third electrode, and an activated carbon electrode being used as the fourth electrode.