Preparation method and application method of anode lithium supplement additive

The invention discloses a method for reconstructing a crystal structure of an organic positive electrode lithium supplement additive. The method comprises the following steps: dissolving the organic positive electrode lithium supplement additive in water to prepare a saturated aqueous solution; adding an organic solvent into the saturated aqueous solution to form turbid liquid; and separating and drying solids in the turbid liquid to obtain the organic positive electrode lithium supplement additive with a reconstructed crystal structure. According to the method, the grain size of the organic positive electrode lithium supplement additive can be reduced, and the distribution is uniform, so that the decomposition potential of the positive electrode lithium supplement additive is reduced, and the first-week charging capacity exertion rate is improved. 本申请公开一种有机正极补锂添加剂晶体结构重构的方法，包括以下步骤：将有机正极补锂添加剂溶解于水中配制成饱和水溶液；在所述饱和水溶液中加入有机溶剂形成悬浊液；对所述悬浊液中的固体进行分离、烘干，得到晶体结构重构后的有机正极补锂添加剂。所述方法可以使有机正极补锂添加剂晶粒尺寸降低，且分布均匀，从而降低正极补锂添加剂的分解电位，提